Which iPhone is best? Or more specifically, which iPhone is best for you? Should you buy one of Apple's latest iPhones - the iPhone 6s or the iPhone 6s Plus - or would an older model, such as the iPhone 6, 6 Plus, or the iPhone 5s, be a better (as well as cheaper) option? Or perhaps it's worth waiting another year for the iPhone 7 or even the rumoured 4in iPhone 6c.

In this article we examine all the options for prospective iPhone buyers: the five models of iPhone currently available, the differences between them in terms of specs, design, features and price, and which one is right for each category of buyer. We also look at older models of iPhone, and advise owners of these iPhones what their best upgrade path is, and also address the question of whether you should buy one of these older iPhones second hand. Finally we talk about storage capacities and colour options.

Whatever you need to know about choosing your next iPhone, we've got the answer here.

Find out what might be coming in 2016: iPhone 7 release date rumours | iPhone 6c release date rumours

Should I buy the iPhone 6s or iPhone 6s Plus?

The latest generation of iPhone, the iPhone 6s and iPhone 6s Plus, went on sale on Friday 25 September.

The iPhone 6s and iPhone 6s Plus offer the following features:

  • 4.7in and 5.5in screens (like iPhone 6 and iPhone 6 Plus)
  • 12Mp camera
  • 5Mp FaceTime camera
  • 3D Touch - essentially a Force Touch display like Apple Watch
  • New Rose Gold colour option
  • Touch ID improvements
  • Faster processor
  • 2GB RAM
  • And more...

Should I buy a new iPhone now or wait for iPhone 7?

A new iPhone launches every year, and next September you can expect the iPhone 7 to launch.

You might already be set on buying the iPhone 6s or iPhone 6s Plus, and satisfied with the features they provide. We don't blame you, we think they will be fantastic smartphones and you'll be happy with either choice.

However, if you can wait another year until the iPhone 7 arrives you might be rewarded with an even better iPhone.

The decision really depends on which iPhone you own currently. If it's more than a year old we'd advise you to upgrade now.

iPhone buying guide: Which iPhone is right for you?

With the iPhone 6s and iPhone 6s Plus having arrived at the end of September 2015, you may be wondering which iPhone to buy. Should you buy the 4.7-inch iPhone 6s? Or might the even bigger 5.5-inch iPhone 6s Plus be more suited to your needs? If your financial resources are somewhat limited, your decision may be based on just how much of a battering your wallet can take. The iPhone 6s Plus costs £80 more than the equivalent iPhone 6s, which in turn costs more than the iPhone 6 and iPhone 6 Plus, and the iPhone 5s. 

You might have an iPhone 5s or iPhone 5c and be wondering whether it's worth updating to the iPhone 6 or iPhone 6 Plus, now that the prices of those phones have dropped, or if you should jump all the way to the newer models. The new models actually only cost £80 more than the equivalent capacity so you may decide to go the whole hog and update to the newer iPhones, which have additional colour options, better cameras, 3D Touch, and a number of other impressive features that more than justify the £80 premium, we think.

If you're really strapped for cash that doesn't mean that you can't own an iPhone; there are various places you can get a second-hand handset, especially now that people are upgrading to the new models. You may be able to get a good deal on one of the older handsets if someone is looking to sell their current iPhone.

We'll evaluate all the iPhone handsets here in this article so you know what you are getting for your cash, including whether they will run the latest iPhone software. The more recent Apple iPhones will have access to most of the new features in iOS 9, but there will also be limited compatibility with some of Apple's older handsets.

Whatever the practical benefits of the new iPhone 6s and iPhone 6s Plus, you will have to weigh up whether those new features, and the pleasure of owning one of the very latest iPhones, are worth the extra expense.

You may have never owned an iPhone and be wondering whether to buy an iPhone or an Android or Windows smartphone. We will look at how the Apple iPhones compare to competitor phones from the likes of Samsung and Nokia. We will also look at how owning other Apple products, such as a Mac or an iPad, might enhance your iPhone experience if you purchase one.

Read on to find out everything you need to know about buying an iPhone.

iPhone buying guide: How to decide which iPhone to buy

Choosing the best iPhone for your needs depends on how you'll use the phone, which functions you'll want to use most often, and how much you are prepared to pay - although the price is relative as you may find a good deal on a network contract that allows you to spread payments in such a way as to allow you to afford the phone of your dreams. 

To help you decide which iPhone to buy, we've summarised the main differences between the various iPhones in the section below, but it's not quite as simple as weighing up the specs. Every Apple fan is different, and every Apple fan has different priorities. Perhaps you need as many gigabytes as you can get, maybe you are a keen iPhone photographer looking for the best iPhone camera, or perhaps you like to play games on your iPhone and need to make sure that the model you choose is up to the task. We aim to help you buy the best iPhone for you.

You can read our current iPhone reviews here:

And we've written a series of comparison reviews, which set various combinations of iPhone against one another, head to head:

For a broader analysis of the current iPhone range and our recommendations of which models are best for various situations or types of customer, read on.

iPhone buying guide: A quick history of the Apple iPhone

Before we start, here's a quick iPhone history to put Apple's smartphone in context.

The first iPhone launched in 2007. Apple actually unveiled it in January 2007, but it didn't launch until the end of June in the US, and November in the UK. The first ever iPhone didn't even offer 3G and it wasn't even the first smartphone, but it did reinvent smartphones and pretty soon after all the other mobile manufacturers started producing iPhone-like handsets with touchscreens and apps just like Apple's iPhone.

Apple has introduced a new iPhone (or two new iPhones) every year since 2007. The company has also updated the iPhone operating system - iOS - every year around the time the new iPhone launches. This means that anyone who owns an iPhone (or iPad) can update their device and enjoy many of the new features offered by the newest handsets.

iPhone buying guide: The full iPhone range (and which iPhone have you got?)

First things first. If you already own an iPhone, which iPhone do you have? This is an important question. If you already own an iPhone it is likely to influence your decision of which iPhone to purchase next. And if you have never owned an iPhone, your needs may be influenced by the Android or Windows smartphone that you have been using.

The iPhone models available currently are as follows:

iPhone 6s

The design of the iPhone 6s is essentially the same as the iPhone 6, but there are a few slight changes as well as a brand new colour option. One significant difference is that the iPhone 6s is made with a more durable Series 7000 Aluminium like the metal used for the Apple Watch in a bid to prevent a repeat of last year's Bendgate debacle. The iPhone 6s is also available in a new Rose Gold colour option, adding to the Gold, Silver and Slate Grey we've seen previously.

The iPhone 6s is slightly thicker than its predecessor, but by such a tiny amount (two tenths of a millimetre to be exact) you'll never notice. It is also 14g heavier.

Apple didn't up the resolution of the iPhone 6s's screen, but this time it offers 3D Touch to introduce a huge range of new features. 3D Touch is a mixture of display tech, hardware and software that works ab bit like Force Touch on the Apple Watch and the new MacBook Trackpad. In addition to tapping, you can 'Peek' and 'Pop' by pressing lightly or pressing harder, using this feature you can preview a new message in Mail, for example. Plus, on the home screen, you'll be able to press on icons to go straight to a particular part of that application, perhaps to take a quick selfie.

There's also a new A9 processor paired with an M9 motion co-processor, plus Apple is said to have upped the RAM to 2GB.

Perhaps one of the biggest updates is to the camera. Apple has introduced a 12Mp camera to the rear and a 5Mp camera to the front as well as improved the pixels. Rather than focusing on packing in loads of new pixels, Apple has instead focused on improving the technology behind it to produce top-quality images. 

The company has also turned the display into a true-tone flash for the front camera, so expect better selfies. In terms of video you can now shoot in 4K, while the front-facing camera can record up to 1080p HD. One final camera feature is the new Live Photos, which let you take snaps that have some movement in them, a little like the magical photos in Harry Potter.

Who is the iPhone 6s best for? If you are a keen iPhone photographer we think that the new camera features alone are likely to sell this phone to you. However, the iPhone 6 Plus offers the same new features, so your decision may be based on price and, more significantly the size and weight of the iPhone 6s. The iPhone 6s is 19.9mm shorter than the 6s Plus and weighs 49g less.

Features offered by the iPhone 6s that aren't in the iPhone 6:

  • Retina HD display with 3D Touch
  • Taptic Engine
  • A9 processor
  • M9 motion coprocessor
  • CDMA EV-DO Rev. A (iPhone 6 = CDMA EV-DO Rev. A and Rev. B (CDMA models only)
  • 4G LTE Advanced3 (iPhone 6 = 4G LTE)
  • 11a/b/g/n/ac WiFi with MIMO (iPhone 6 no MIMO)
  • Second-generation fingerprint sensor
  • 12-megapixel iSight camera with 1.22µ pixels
  • Live Photos
  • Optical image stabilization
  • Improved local tone mapping
  • Improved noise reduction
  • Tap to focus with Focus Pixels
  • Panorama (up to 63 megapixels) (was 43MP)
  • 4K video recording (3840x2160) at 30 fps
  • Slo-mo video support for 1080p at 120 fps and 720p at 240 fps
  • Time-lapse video with stabilization
  • Take 8MP still photos while recording 4K video
  • Playback zoom
  • 5-megapixel FaceTime Camera
  • Retina Flash

iPhone 6s Plus

Apple's new 5.5-inch smartphone offers many of the same features as it's smaller sibling, including a super-fast processor and a new pressure-sensitive screen.

Compared to its predecessor, the 6s Plus is fractionally wider and thicker, and a little heavier too, 20g heavier in fact. The reason it's slighlty thicker and heavier is to accommodate the components needed to power the new 3D Touch screen, a benefit that more than makes up for the fractionally heavier phone.

Previous iPhones were made of 6000-series aluminium alloy, whereas the 6s Plus is made of the stronger (and lighter, and costlier) 7000 series. This should mean that there will be no repeat of the Bendgate fiasco of last year - an issue that appeared to affect some iPhone 6 Plus models.

As we said above, 3D Touch is a new feature that will open up many new features to iPhone 6s and 6s Plus owners. We wonder how steep a learning curve it will be to adopt this new way of manipulating the phone - many Apple Watch users have struggled to grasp the Touch interface of that device.

Like the iPhone 6s, the iPhone 6s Plus gains a better 12Mp camera with improved pixels, and a 5Mp camera on the front for taking selfies. There's also the Retina flash for front facing shots. And like the iPhone 6s you can pretend you are Harry Potter and take Live Photos that show a three second animation when you press them.

Who is the iPhone 6s Plus best for? The iPhone 6s Plus is for people who want the biggest possible iPhone screen. When the iPhone 6s Plus launched in 2014 it was particularly popular with women, perhaps because the phone could be carried around in a bag (while guys usually only have pockets for such things). Alternatively it may be the popularity of social networks like Facebook that lead some women to pick the bigger screen for an even more engrossing experience when using the device.

Similarly gamers opted for the iPhone 6 Plus in 2014, thanks to the bigger screen, but also the higher specs of that model - in particular the Plus series offers better battery life, which may be a benefit to gamers as well as those who like to watch video on the device - another reason why the iPhone 6s Plus may be chosen over the 6s. Finally, the iPhone 6s Plus, like it's predecessor, offers some camera features not offered by the 6s, namely optical image stabilisation. 

As with last year's Plus-sized model, if you have small or even medium-sized hands, you won't be able to reach the entire screen with a single thumb the way you could on a 4- or even (if your hands aren't particularly small) the 4.7-inch screen. You generally have to treat the 6s Plus as a two-handed device, like an iPad mini, but Apple has also added a clever interface feature called Reachability that pulls the screen downwards when you double-tap.

Features offered by the iPhone 6s Plus that aren't in the iPhone 6 Plus:

  • Retina HD display with 3D Touch
  • Taptic Engine
  • A9 processor
  • M9 motion coprocessor
  • CDMA EV-DO Rev. A (iPhone 6 Plus = CDMA EV-DO Rev. A and Rev. B (CDMA models only)
  • 4G LTE Advanced3 (iPhone 6 Plus = 4G LTE)
  • 11a/b/g/n/ac WiFi with MIMO (iPhone 6 Plus no MIMO)
  • Second-generation fingerprint sensor
  • 12-megapixel iSight camera with 1.22µ pixels
  • Live Photos
  • Optical image stabilization
  • Improved local tone mapping
  • Improved noise reduction
  • Tap to focus with Focus Pixels
  • Panorama (up to 63 megapixels) (was 43MP)
  • 4K video recording (3840x2160) at 30 fps
  • Optical image stabilisation for video (not on the iPhone 6s)
  • Slo-mo video support for 1080p at 120 fps and 720p at 240 fps
  • Time-lapse video with stabilization
  • Take 8MP still photos while recording 4K video
  • Playback zoom
  • 5-megapixel FaceTime Camera
  • Retina Flash

iPhone 6 Plus

The iPhone 6 Plus was Apple's first phablet-style phone. Phablet is basically the name used for phones that are so big that they are like small tablets. The iPhone 6 Plus has a 5.5-inch screen so it's not a lot smaller than the iPad mini. In addition to the bigger, better screen the Plus offers a better camera than the iPhone 6. Read our iPhone 6 Plus review.

When the iPhone 6 Plus launched it was available in gold, silver and space grey, now the gold model has been removed from the line up, so if you want a gold (or rose gold) iPhone you would have to consider the iPhone 6s range.

iPhone buying guide: iPhone 6 Plus

Who is the iPhone 6 Plus best for? Those who want a 'phablet' experience - one which is midway between a phone and a small tablet. Big fans of gaming and movies, both of which look great on the 6 Plus's big screen. Some business users may find that the big screen is good for productivity apps.

If you've got an iPhone 6 Plus... Then you already have a great iPhone and you might not feel that there is adequate reason to upgrade to the iPhone 6s Plus. Of course, you may have found the device a bit too big, if that is the case then you might choose to upgrade to the smaller iPhone 6s. Alternatively you might prefer to hang out for another year and upgrade when Apple launches the iPhone 7 and 7 Plus in 2016.

iPhone 6

The iPhone 6 has a bigger screen than the iPhone 5s: 4.7 inches (measured diagonally, corner to corner) compared to the 4 inch iPhone 5s. It's also thinner and lighter than the new iPhone 6s but the gold finish is no longer available - if you want a gold (or rose gold) iPhone you must look to the 6s range.

Like the iPhone 6 Plus it features the A8 processor and an NFC chip for Apple Pay payments. Read our iPhone 6 review and our iPhone 6 vs iPhone 6 Plus comparison review.

iPhone buying guide: iPhone 6

Who is the iPhone 6 best for? Similar to the Plus models this is likely to be a popular with those who would like a bigger screen (for games and films in particular) but want a more portable device. The iPhone 6 is easier to slip into a pocket (and easier to use one-handed) than the iPhone 6 Plus. It's also a bit more affordable (£80 less for each capacity offered).

If you've got an iPhone 6... Again, you may decide to wait another year rather than upgrading what is still a good phone, unless this taste of a larger screen has whetted your appetite for the even bigger iPhone 6s Plus. If you are a very keen iPhone photographer the new camera features may well see this new phone to you. However, many iPhone owners upgrade every other year and it might make sense to hold on to the iPhone 6 until 2016.

iPhone 5s

This is the iPhone Apple introduced in September 2013. It's still available, now as Apple's entry-level iPhone, and has a Touch ID button allowing fingerprint scanning for security, rather than the older style home button with a square in the middle. However Touch ID on the iPhone 5s cannot be used for Apple Pay as the phone lacks the NFC chip. Apple is now only selling only the 16GB and 32GB models in silver and space grey. Read our iPhone 5s review. and our iPhone 5s vs iPhone 6 comparison review.

If you've got an iPhone 5s... The main question is this: should you upgrade to the iPhone 6s or iPhone 6s Plus?

The bigger screen on the iPhone 6s and iPhone 6s Plus (or the 6 and 6 Plus) may be a big temptation for iPhone 5s owners, or it might put those who prefer the 4in screen off. If you are happy to opt for a bigger screen, the big question will be whether to go for the iPhone 6s, with its 4.7in screen, or the iPhone 6s Plus with its 5.5in screen.

If you really don't want a bigger screen there are rumours that Apple is working on a 4in iPhone 6c which may launch in 2016. We certainly hope that Apple is doing this as we feel it is a big mistake to remove the 4in display from the line up. When Apple launched the 4in iPhone it emphasised that the phone was designed to be comfortable to hold one handed, and this is still important to many people.

You may consider updating from the iPhone 5s to the year-old iPhone 6 or 6 Plus. Here is how those phones compare (to see the extra features that you could get if you opted for the newer models see above - those will be in addition to these new features):

Features offered by the iPhone 6 Plus that aren't in the iPhone 5s:

  • Retina HD display
  • 5.5-inch display (compared to 4-inch)
  • 1920-by-1080 pixel resolution at 401ppi (compared to 1136-by-640-pixel resolution at 326 ppi)
  • 1300:1 contrast ratio (compared to 800:1 contrast ratio)
  • Dual-domain pixels for wider viewing angles
  • Display Zoom
  • Reachability
  • A8 & M8 chips (compared to A7 & M7)
  • Autofocus with Focus Pixels
  • Optical image stabilization
  • Improved face detection
  • Panorama, up to 43 megapixels
  • 1080p HD video recording, 30 fps or 60 fps (was 30 fps)
  • Slo-mo video, 120 fps or 240 fps (was 120 fps)
  • Cinematic video stabilization
  • Continuous autofocus video
  • Improved face detection on both cameras
  • ƒ/2.2 aperture for FaceTime camera (compared to ƒ/2.4 aperture)
  • Auto HDR for photos and videos on FaceTime camera (previously Auto HDR only)
  • Burst mode on FaceTime camera
  • Pay with your iPhone using Touch ID in stores and in apps
  • 802.11ac Wi-Fi
  • NFC
  • FaceTime over cellular uses H.264/H.265
  • Voice over LTE (VoLTE)3
  • Up to 24 hours talk time on 3G (was 10)
  • Up to 16 days/384 hours standby time (was 10 days, 250 hours)
  • Up to 12 hours internet on 3G, up to 12 hours on LTE, and up to 11 hours on Wi-Fi (was 8 , 10 and 11)
  • Up to 14 hours video playback (was 10)
  • Up to 80 hours audio playback (was 40)
  • Barometer

Features offered by the iPhone 6 that aren't in the iPhone 5s:

  • Retina HD display
  • 4.7-inch display (compared to 4-inch)
  • 1334-by-750 pixel resolution at 326ppi (compared to 1136-by-640-pixel resolution at 326 ppi)
  • 1400:1 contrast ratio (compared to 800:1 contrast ratio)
  • Dual-domain pixels for wider viewing angles
  • Display Zoom
  • Reachability
  • A8 & M8 chips (compared to A7 & M7)
  • Autofocus with Focus Pixels
  • Improved face detection
  • Panorama, up to 43 megapixels
  • 1080p HD video recording, 30 fps or 60 fps (was 30 fps)
  • Slo-mo video, 120 fps or 240 fps (was 120 fps)
  • Cinematic video stabilization
  • Continuous autofocus video
  • Improved face detection on both cameras
  • ƒ/2.2 aperture for FaceTime camera (compared to ƒ/2.4 aperture)
  • Auto HDR for photos and videos on FaceTime camera (previously Auto HDR only)
  • Burst mode on FaceTime camera
  • Pay with your iPhone using Touch ID in stores and in apps
  • 802.11ac Wi-Fi
  • NFC
  • FaceTime over cellular uses H.264/H.265
  • Voice over LTE (VoLTE)3
  • Up to 14 hours talk time on 3G (was 10)
  • Up to 10 hours internet on 3G, up to 10 hours on LTE, and up to 11 hours on Wi-Fi (was 8 , 10 and 11)
  • Up to 11 hours video playback (was 10)
  • Up to 50 hours audio playback (was 40)
  • Barometer

iPhone 5c (currently not on sale - but likely available second-hand)

The iPhone 5c is no longer being sold by Apple, although you may be able to pick one up on eBay or similar. It features a polycarbonate (plastic) shell that comes in six bright colours. Apple released the iPhone 5c alongside the iPhone 5s in September 2013. On the inside it's pretty similar to the iPhone 5, although the camera is better. It uses a Nano-SIM. Read our comparison review of the iPhone 5s versus the iPhone 5c. Read our iPhone 5c review.

If you've got an iPhone 5c... You may be wondering if you should upgrade to the iPhone 6s or iPhone 6.

If you currently own a iPhone 5c you would see a huge boost if you updated to the iPhone 6 or 6s, because the processors are faster in those models - indeed, the iPhone 5s also has a faster processor. There are a lot of new features offered by the newer phones, but there are also various features that the iPhone 5s has that the iPhone 5c doesn't, like the Touch ID fingerprint scanner and a better camera with better photography features, so you may consider updating to that phone. Apple has dropped the price of the iPhone 5s compared to last year, so you could find it is more affordable now than it was. 

Last year the iPhone 5s cost £459 for the 16GB and £499 for the 32GB. Now the 16GB iPhone 5s costs £379 while the 32GB model costs £419. That's £80 less for the 32GB version and £120 less for the 16GB model (we're glad that Apple isn't offering a 8GB version, as it did with the iPHoen 5c, because we don't think 8GB is adequate storage - but the 16GB is also very minimal storage and will not suit everyone so the 32GB model might be a better choice.

Features offered by the iPhone 6 that aren't in the iPhone 5c (note that even more new features are offered by the 6s, see above for more information)

  • Retina HD display
  • 4.7-inch display (compared to 4-inch)
  • 1334-by-750 pixel resolution at 326ppi (compared to 1136-by-640-pixel resolution at 326 ppi)
  • 1400:1 contrast ratio (compared to 800:1 contrast ratio)
  • Dual-domain pixels for wider viewing angles
  • Display Zoom
  • Reachability
  • A8 & M8 chips (compared to A6)
  • Autofocus with Focus Pixels
  • Improved face detection
  • Panorama, up to 43 megapixels
  • 1080p HD video recording, 30 fps or 60 fps (was 30 fps)
  • True Tone Flash (LED flash)
  • Slo-mo video at 120 fps or 240 fps (5c didn't have slow-mo video)
  • Cinematic video stabilization
  • Continuous autofocus video
  • Improved face detection on both cameras
  • ƒ/2.2 aperture for FaceTime camera (compared to ƒ/2.4 aperture)
  • Auto image stabilization
  • Auto HDR for photos on both cameras (was just HDR)
  • Auto HDR for video on FaceTime camera
  • Burst mode
  • Burst mode on FaceTime camera
  • Pay with your iPhone using Touch ID in stores and in apps
  • 802.11ac Wi-Fi
  • NFC
  • FaceTime over cellular uses H.264/H.265
  • Voice over LTE (VoLTE)3
  • Up to 14 hours talk time on 3G (was 10)
  • Up to 10 hours internet on 3G, up to 10 hours on LTE, and up to 11 hours on Wi-Fi (was 8 , 10 and 10)
  • Up to 11 hours video playback (was 10)
  • Up to 50 hours audio playback (was 40)
  • Barometer

Features offered by the iPhone 5s that aren't in the iPhone 5c

  • A7 & M7 chips (compared to A6)
  • True Tone Flash (LED flash)
  • Slo-mo video at 120 fps
  • Auto HDR for photos on FaceTime camera
  • Burst mode

iPhone 5 (currently not on sale - but likely available second-hand)

The iPhone 5 was launched in September 2012 and was the first Apple iPhone with a 4in screen. It was available in 'Slate' or 'Silver'. The iPhone 5s looks similar to the iPhone 5, but the clearest difference between the two iPhones is the home button which has a white square logo in the centre on the older iPhone. It uses a Nano-SIM. Read our iPhone 5 vs iPhone 5S comparison review our iPhone 5 review, and our iPhone 5c v iPhone 5 comparison review.

Read next: Complete guide to buying an older, second-hand or refurbished iPhone

If you've got an iPhone 5... With a device that's now over three years old, you're probably thinking about upgrading. But if you decide to trade in your iPhone 5 for another iOS device, should you upgrade to the iPhone 6s Plus, iPhone 6s, iPhone 6 Plus, iPhone 6 or iPhone 5s?

For a start, if you're still using an iPhone 5 you may be missing out on 4G, as that model only supports 4G on a few of the UK networks. If you are with one of the networks that isn't supported for 4G, O2, Vodafone, for example, faster mobile broadband on the go is a great reason to upgrade. Find out if your network is supported here.

Since you may have had this phone for three years now it is likely you are coming to the end of your contract, which means it's an excellent time to upgrade.

You don't have to pay a huge amount to upgrade from the iPhone 5 to the iPhone 5s, the iPhone 5s is now Apple's cheapest iPhone costing £379 up front (and probably available for free on contracts). This is a higher entry level price than last year's iPhone 5c, but that phone only offered 8GB storage.

If you prefer the smaller screen size of the iPhone 5s it might be better to update from the 5 to the 5s, but you could go the whole hog and get the iPhone 6s or 6s Plus, or perhaps the slightly cheaper iPhone 6 or 6 Plus will suit you.

iPhone 4s (currently not on sale)

Apple was still offering the iPhone 4s for sale until 2014, but it dropped out of availability when the iPhone 6 series made their debut. There are still a fair few Apple fans on this relatively elderly device.

The iPhone 4s has a smaller screen than even the iPhone 5 (it's just 3.5 inches, compared to the 4-inch screens on the iPhone 5, 5c and 5s, and of course the still-bigger screens on the iPhone 6 series) but has a similar metallic shell. It uses a Micro-SIM and was launched in October 2011. Read our iPhone 4s review and our iPhone 5c vs iPhone 4s review.

If you've got an iPhone 4s... should you update to one of the newer iPhones?

Upgrading from the iPhone 4s is a bit of a no-brainer. It's a 3.5-inch phone for starters, so you're working with less screen than most other smartphone owners: whether you upgrade to the iPhone 5c or 5s for a 4-inch screen, or the new iPhones with their 4.7-inch or 5.5-inch screens, you'll quickly get used to the extra screen space. The iPhone 5 was 18 percent thinner and 20 percent lighter than the 4S, the iPhone 5s even lighter still. The new iPhones are even thinner, although since they have bigger screens you may notice the extra bulk.

For some the huge leap from a 3.5in iPhone to a 4.7in (or even 5.5in) model may be too great. Those people might prefer to opt for the cheaper iPhone 5s.

The only other reason that you may not wish to upgrade from the iPhone 4s is if you own speakers and other iPhone accessories that use the older iPhone port. With the iPhone 5 Apple introduced the smaller Lightning dock, which means your existing accessories will need an adaptor, which costs £25.

However, we find these days that many of the stereo systems use AirPlay rather than plugging in directly, and we don't really miss our old iPhone accessories.

In terms of iOS 9, bear in mind that the iPhone 4s misses out on some of the showier improvements.

iPhone 4 (currently not on sale)

The iPhone 4 looks very similar to the iPhone 4s, and like that model it uses a Micro-SIM. The key difference is the number of megapixels offered by the camera: 5Mp in the iPhone 4 compared to 8Mp in the iPhone 4s. It launched in June 2010. Read our iPhone 4 review.

iPhone buying guide: iPhone 4

If you've got an iPhone 4... If you're still using an iPhone 4 then now is a good time to upgrade. Whichever of the four currently available iPhones you choose will add a bigger screen, thinner chassis and 4G capabilities. The iPhone 4 is well behind both 4S and 5 in its photographic fidelity and has no Siri voice assistant. It's also about a quarter as fast as the iPhone 5 so imagine how much faster the new iPhone 6 will be.

In terms of iOS 9, the iPhone 4 is not supported so you will be left behind in terms of new features and other improvements that will come with the new operating system - including features in OS X that make your Mac, iPhone and iPad work together.

iPhone 3Gs (currently not on sale)

The iPhone 3Gs was the last of Apple's plastic iPhones for several years (the company eventually returned to plastic shells for the iPhone 5c). It had a 3Mp rear-facing camera but no front-facing camera for FaceTime. Like the 3G, this model came in black or white. It launched in June 2009. Read our iPhone 3GS UK review.

If you've got an iPhone 3GS (or an earlier iPhone model)... A lot of people are still happily using an iPhone 3GS. Perhaps they adopted one when a family member updated their iPhone. They have missed out on iOS 7 and more recently missed out again on iOS 8, so for the sake of new software features alone it may be time to update.

There's no need to jump right up to the iPhone 6s in this case, of course. The cheaper iPhone 5s may well suit you, or even the iPhone 5c - you could probably pick one up for a good price on eBay or similar.

Whatever you update to, you will enjoy a Retina display, a marvel of touchscreen technology with pixels so closely packed they can fool the human eye, and a far cry from the 3GS.

iPhone 3G (currently not on sale)

The iPhone 3G had a 2MP camera and no front-facing camera. This model came in black or white. It launched in July 2008. Read our iPhone 3G review.

Original iPhone (currently not on sale)

Launched in June 2007, the original iPhone had a 2Mp camera. The first iPhone was only available in a black plastic finish. Read our iPhone (first-generation) review.

iPhone buying guide: How much should you spend on an iPhone?

We tend to recommend that consumers spend as much money as they can upfront when buying an iPhone. There are a few reasons why. Firstly if you don't get enough GB at the start then you may feel crippled later - there is no way to add more memory at a later date and no SD card slot like you will find on some Android phones. We address the question of how many GB of storage you need further down in this article.

Remember when you look at the price of the iPhone as offered by Apple that this is the price if you buy the iPhone outright. You don't have to fork out a lot upfront if you sign up for a contract with one of the UK networks. Of course this means that you will have a higher monthly bill than you would if you were only paying for the minutes and data, but for most people who don't have thousands in their rainy day account, this may be the best choice.

We think the best idea is to find a happy medium. Look for a good network contract that means you won't be paying a hell of a lot over time. Always times the monthly bill by 24 if it's a two year contract or 12 if it's a one-year contract and add the up front cost to see what kind of a deal you are signing up for. It may look like a good deal, but it is all relative.

The phones that Apple sells currently are priced as follows on Apple's website, although as we keep saying, these are unlocked, non-contract prices, so you can spread payments over two years if you want to sign up with a network.

  • iPhone 5s: 16GB, £379 | 32GB, £419
  • iPhone 6: 16GB, £459 | 64GB, £539
  • iPhone 6 Plus: 16GB, £539 | 64GB, £619
  • iPhone 6s: 16GB, £539 | 64GB, £619 | 128GB, £699
  • iPhone 6s Plus: 16GB, £619 | 64GB, £699 | 128GB, £789

You can read more about the contract pricing of the iPhones here: iPhone 6s Plus UK pricing and iPhone 6s UK pricing.

iPhone buying guide: What is the best screen size for an iPhone?

There are three different screen sizes of iPhone available currently: 4-inch, 4.7-inch and 5.5-inch. That's a far cry from Apple's insistence that it wouldn't make an iPhone with a bigger screen because of "tradeoffs in screen quality", and because it is less comfortable and ergonomic to use a bigger screen. (Apple has previously emphasised the fact that the 4in screen is ideal because you can use it one-handed.)

Both of the new iPhones are the same size as 2014's iPhone 6 and 6 Plus, and bigger than the 4-inch screen on 2013's flagship iPhone, the iPhoen 5s, however, Apple says it has made sure that the new iPhones are still comfortable to use despite the bigger surface area. As with last year's bigger models, Apple has software to help compensate for the larger screen sizes, for example, Apple's engineers have implemented a feature called Reachability. Reachability is activated by a double-touch on the Home button and it shrinks the user interface towards the bottom of the phone and closer to your thumb. This makes it easier to tap objects near the top of the screen while using one hand, although we never found ourselves using it very often on our iPhone 6.

iOS 8 was  designed to take advantage of the larger screens so, for example, the keyboard on the Plus has extra keys, including dedicated virtual buttons for cut, copy and paste. And, also on the Plus, apps like Messaging, Email, and Calendar use a split mode to show you more information. iOS 9 has even more features that take advantage of the larger screen space.

The best screen size is likely to be a very personal thing. Perhaps you have small hands and the 5.5in iPhone 6s Plus or iPhone 6 Plus would dwarf them. Perhaps you tend to use your iPhone most while commuting to and from work and having to use it one-handed means that even with Apple's Reachability features it would be uncomfortable to use a big screened iPhone. Or maybe you have been waiting for the bigger screen since you saw your Android wielding friends with there's and feel that at last you can enjoy the benefits of a bigger screen.

There are various apps that will benefit from the bigger screen. Maybe you primarily use your iPhone for reading articles or watching movies - the bigger screen will be ideal. If you often find yourself tapping out work related documents and emails on your iPhone the extra space - and particularly the extra keys for the keyboard will be handy. On the other hand, if you already own an iPad you may not need a bigger iPhone too.

iPhone buying guide: Which iPhone has the best display?

As we mentioned earlier, the iPhone 6s Plus, like the iPhone 6 Plus before it, has a 1920-x-1080-pixel 5.5-inch LED-backlit display offering 401 pixels per inch.

The iPhone 6s and iPhone 6, on the other hand, offer a 1334-x-750-pixel LED-backlit display. Despite the fact that the display measures 4.7-inch, it works out to 326 pixels per inch, which is actually the same as the iPhone 5 and 5s.

Apple calls these displays on the bigger iPhones Retina HD display even though only the Plus offers a greater number of pixels per inch. in fact it offers two million pixels in total, that's nearly a million more pixels than the iPhone 6 and 6s. However, both the new displays feature an LCD with dual-domain pixels for improved viewing angles and a substantially higher contrast ratio, so the iPhone 6 and 6s screens are still better than the iPhone 5s.

It's the contrast ratio that provides the biggest difference: the iPhone 5s had an 800:1 ratio. While the iPhone 6 and 6s have a 1400:1 ratio, and the larger 6s Plus, and 6 Plus offer 1300:1.

This means the Plus models offer 88% more viewing area and three times the pixels on iPhone 5s.

It sounds impressive, but remember, while the Plus models pack a million more pixels into the display, but there comes a point where we can't actually distinguish any difference - these displays are referred to as Retina Displays because there are only so many pixels your eye can see.

iPhone 6s screen:

  • Retina HD display
  • 4.7-inch display
  • 1334x750-pixel resolution at 326 ppi
  • 1400:1 contrast ratio (typical)
  • 500 cd/m2 max brightness (typical)
  • Full sRGB standard
  • Dual-domain pixels for wider viewing angles

iPhone 6s Plus screen:

  • Retina HD display
  • 5.5-inch display 
  • 1920x1080-pixel resolution at 401 ppi
  • 1300:1 contrast ratio (typical)
  • 500 cd/m2 max brightness (typical)
  • Full sRGB standard
  • Dual-domain pixels for wider viewing angles

iPhone 6 screen:

  • Retina HD display
  • 4.7-inch display
  • 1334-by-750 pixel resolution at 326ppi
  • 1400:1 contrast ratio
  • Dual-domain pixels for wider viewing angles

iPhone 6 Plus screen:

  • Retina HD display
  • 5.5-inch display
  • 1920-by-1080 pixel resolution at 401ppi
  • 1300:1 contrast ratio
  • Dual-domain pixels for wider viewing angles

iPhone buying guide: What storage capacity to go for, how many GB is best

Prior to the launch of the iPhone 6, iPhones tended to come in 16GB and 32GB versions, with a 64GB version available for the top of the range model. Apple has also been known to offer an 8GB on the most affordable iPhone. Read about why it's not a good idea to buy the 16GB version: The problem with Apple's 16GB iPhones and iPads

The current line up is slightly different:

The iPhone 6s and iPhone 6s Plus are available in 16GB, 64GB, and 128GB.

The iPhone 6 and iPhone 6 Plus are available in 16GB, 64GB.

The iPhone 5s comes in 16GB and 32GB.

How do you decide how many gigabytes are necessary?

Apps are getting larger, and photos and videos are addictive to shoot and gobble up and ever-increasing amount of gigabytes. For that reason, as we mention above, we would always recommend going for as many GB as you can afford.

If you already have an iPhone check how much space all your apps and data are eating up on your by looking at Settings > General > Usage.

You don't have to transfer every app to your new iPhone though. We went from a 64GB to a 16GB without too much stress because we culled our apps. You can always download an app again at a later date, Apple knows that you already bought it so you can download it again for free.

Then again maintaining 16GB of space requires a lot of housekeeping, so if you take a lot of photos, or download video from iTunes or iPlayer, expect to fill up the space available quickly.

In the past we'd have recommended opting for 32GB over 16GB - we used to think that 64GB was overkill - but for some even 64GB may still not be enough, and they are the people who will be pleased with the option of a 128GB iPhone.

In 2014-2015 the entry level phone was an 8GB iPhone 5c but we felt that was too small - if you are thinking of purchasing a second hand iPhone 5c we'd recommend looking for one with at least 16GB or 32GB (although these handsets would be a few years old) as we think that it would be very difficult to manage with just 8GB given that iOS would take up a significant part of that space. We think that 8GB isn't really enough storage for the average iPhone user so we'd advise against the 8GB iPhone 5c for that reason.

We are disappointed that Apple is not selling a 32GB version of the iPhone 6 and iPhone 6 Plus - we think the best line up would be 32GB, 64GB, rather than 16GB, 64GB. However, it's likely that Apple is aiming to make the 64GB version an attractive upgrade from the 16GB entry-level model. It only costs £80 more, why wouldn't you spend the extra for all that extra storage.

Which iPhone is lightest? Weight and dimensions of Apple's iPhones

The larger screen obviously means a larger size and a bit more weight, so if you are looking for a lighter phone the 5.5-inch iPhone 6s Plus may not be the one for you. Similarly, if you have small hands you may find that the iPhone 6s Plus is too large to be held comfortably in your hand. The same goes for the iPhone 6 Plus - but that model is lighter than the newer model.

Even the iPhone 6s and 6, though thinner than the iPhone 5s, weigh more than that model. But that's hardly surprising given the fact that there is a greater surface area. The iPhone 6s is slightly heavier and thicker than the iPhone 6 due to the 3D touch feature.

The weight and dimensions of the full range of iPhones currently on sale from Apple is as follows:

  • iPhone 6s Plus: 158.2 mm x 77.9 mm x 7.3 mm | 192 grams
  • iPhone 6s: 138.3 mm x 67.1 mm x 7.1 mm | 143 grams
  • iPhone 6 Plus: 158.1 mm x 77.8 mm x 7.1 mm | 172 grams
  • iPhone 6: 138.1 mm x 67.0 mm x 6.9 mm | 129 grams
  • iPhone 5s: 123.8 mm x 58.6 mm x 7.6 mm | 112 grams

If portability is the key, and if you already own a tablet or use a traditional computer for everyday tasks you may not need a bigger screen iPhone.

Even if you could use a bigger screen you may not need the iPhone 6s Plus - the iPhone 6 screen is still 38 percent larger than the 4in iPhone 5s.

We think it's a shame that Apple is only offering new iPhones in these bigger sizes, we hope that in the future the company will upgrade the smaller 4in iPhones. Perhaps an iPhone 6c could arrive in 2016.

iPhone buying guide: iPhone colour choices

The iPhone 6, iPhone 6 Plus and the iPhone 5s all offer the same colour choices: silver and space grey (black). There used to be gold versions of the iPhone 6 and iPhone 6 Plus but Apple has discontinued these versions, and now is you want a gold iPhone you have to buy the iPhone 6s or iPhone 6s Plus. Those newer models have an additional new colour choice: a rose gold model.

The now discontinued iPhone 5c came in five bright colour choices. If you can find one second hand you can choose from white, pink, yellow, blue and green.

Of course the colour choice may be redundant if you choose to put your iPhone in a case as many do, in order to protect them.

We have a round up of iPhone 6 and iPhone 6 Plus cases here: Best cases for iPhone

iPhone buying guide: Which iPhone is best for software?

Like iOS 8 before it, iOS 9 works on the latest iPhones including the iPhone 6 and iPhone 6 Plus, iPhone 5s, 5c, 5 and iPhone 4s as well as the new iPhone 6s and iPhone 6s Plus (obviously).

If you’re excited by iOS 9 but you’re willing to sacrifice a few features the iPhone 4s might be ok, but you need to keep in mind that that phone will be able to utilise many of the new features to their full potential and installing the new software may render your phone slower and less responsive. (Read about why Apple isn't making your iPhone slower on purpose)

It can be a whole lot worse than the iPhone 4s software situation though. Many of the features that came with iOS 6 back in 2012 don't even work with the iPhone 4. The main things missing are Siri, FaceTime over 3G, Flyover and turn-by-turn navigation. That phone won't even run iOS 8. 

You can also expect some of the older iPhones not to offer support for newer apps. Developers had been focusing efforts on four-inch iPhones, we expect that they will now focus their attention on the screen size of the new iPhones.

Find out more about iOS 9 here.

iPhone buying guide: Which iPhone is best for photography?

None of today's cameraphones can replace a digital SLR for top-level photography, but iPhones are definitely getting better in this area, and the iPhone 6s and 6s Plus offer the biggest camera upgrade in a long time including 12MP shooting.

Over the iOS iterations we've gained a panoramic shooting mode, burst mode, slow-mo video recording, and various editing features, the latest models will also offer a new way of shooting moving photographs, called Live Photos

The iPhone 6, 6 Plus, iPhone 5s, iPhone 5c and iPhone 5 all offer 8 megapixels. The new iPhones offer 12 megapixels, but in addition they offer 1.22µ pixels - which are better than the 1.5µ pixels of 2014's models. 

When Apple launched the iPhone 5s they made much of the fact that sensor size is more important than the number of megapixels. When Apple launched that iPhone, rather than make the pixels smaller in order to increase the amount of pixels that can be fitted on the sensor, Apple increased pixel size to 1.5µm (from 1.4µm - those measurements are in micrometers) and kept the pixel count the same by using a 15 percent larger sensor. The new iPhones offer even bigger pixels for better pictures.

It's significant that Apple has improved the pixel quality, but it's more significant that the pixel quality has improved. This is because megapixels aren't everything, read about that in this article: Why it doesn't matter how many megapixels your iPhone has.

Despite having fewer megapixels than the newer models, the iPhone 6 and 6 Plus both offer improvements in the camera software compared to the iPhone 5s. The iPhone 6 Plus and the 6s Plus feature a camera with optical image stabilisation, which should help in taking pictures and video. While the iPhone 6 and 6s offer an improved camera with digital stabilisation.

Another new feature in the iPhone 5s was a True Tone Flash which was designed to make flash photography more flattering.

Camera features offered by the iPhone 6s Plus

  • 12-megapixel iSight camera with 1.22µ pixels
  • Live Photos
  • Optical image stabilization (Plus only)
  • Improved local tone mapping
  • Improved noise reduction
  • Tap to focus with Focus Pixels
  • Panorama (up to 63 megapixels) (was 43MP)
  • 4K video recording (3840x2160) at 30 fps
  • Optical image stabilisation for video (not on the iPhone 6s)
  • Slo-mo video support for 1080p at 120 fps and 720p at 240 fps
  • Time-lapse video with stabilization
  • Take 8MP still photos while recording 4K video
  • Playback zoom
  • 5-megapixel FaceTime Camera
  • Retina Flash

Camera features offered by the iPhone 6s

  • 12-megapixel iSight camera with 1.22µ pixels
  • Live Photos
  • Improved local tone mapping
  • Improved noise reduction
  • Tap to focus with Focus Pixels
  • Panorama (up to 63 megapixels) (was 43MP)
  • 4K video recording (3840x2160) at 30 fps
  • Slo-mo video support for 1080p at 120 fps and 720p at 240 fps
  • Time-lapse video with stabilization
  • Take 8MP still photos while recording 4K video
  • Playback zoom
  • 5-megapixel FaceTime Camera
  • Retina Flash

Camera features offered by the iPhone 6 Plus

  • Autofocus with Focus Pixels
  • Optical image stabilisation (Plus only)
  • Improved face detection
  • Panorama, up to 43 megapixels
  • 1080p HD video recording, 30 fps or 60 fps (was 30 fps)
  • Slo-mo video, 120 fps or 240 fps (was 120 fps)
  • Cinematic video stabilisation
  • Continuous autofocus video
  • Improved face detection on both cameras
  • ƒ/2.2 aperture for FaceTime camera (compared to ƒ/2.4 aperture on iPhone 5s)
  • Auto HDR for photos and videos on FaceTime camera (previously Auto HDR only)
  • Burst mode on FaceTime camera

Camera features offered by the iPhone 6

  • Autofocus with Focus Pixels
  • Improved face detection
  • Panorama, up to 43 megapixels
  • 1080p HD video recording, 30 fps or 60 fps (was 30 fps)
  • Slo-mo video, 120 fps or 240 fps (was 120 fps)
  • Cinematic video stabilisation
  • Continuous autofocus video
  • Improved face detection on both cameras
  • ƒ/2.2 aperture for FaceTime camera (compared to ƒ/2.4 aperture on iPhone 5s)
  • Auto HDR for photos and videos on FaceTime camera (previously Auto HDR only)
  • Burst mode on FaceTime camera

Camera features offered by the iPhone 5s (that aren't in the iPhone 5c)

  • True Tone Flash (LED flash)
  • Slo-mo video at 120 fps
  • Auto HDR for photos on FaceTime camera
  • Burst mode

iPhone buying guide: Which iPhone is best for battery life?

The iPhone 6 Plus model has a larger battery than any other iPhone which means Apple can claim a talk time of up to 24 hours on 3G and a standby time of 16 days compared to the iPhone 6's 14 hours and 10-day standby.

Video and audio playback as well as internet use is listed as 14, 80 and 12 hours on the Plus; 11, 50, and 10 hours on the 6. if you spend a lot of time using your phone to read, surf or check email and Facebook, the larger screen and longer battery life are a better option.

iPhone 6s Plus battery life

  • Up to 24 hours talk time on 3G
  • Up to 16 days standby
  • Up to 12 hours internet on 3G, up to 12 hours on LTE, and up to 12 hours on Wi-Fi
  • Up to 14 hours video playback
  • Up to 80 hours audio playback

iPhone 6s battery life

  • Up to 14 hours talk time on 3G
  • Up to 10 days standby
  • Up to 10 hours internet on 3G, up to 10 hours on LTE, and up to 11 hours on Wi-Fi
  • Up to 11 hours video playback
  • Up to 50 hours audio playback

iPhone 6 Plus battery life

  • Up to 24 hours talk time on 3G
  • Up to 16 days standby
  • Up to 12 hours internet on 3G, up to 12 hours on LTE, and up to 12 (was 11) hours on Wi-Fi
  • Up to 14 hours video playback
  • Up to 80 hours audio playback

iPhone 6 battery life

  • Up to 14 hours talk time on 3G
  • Up to 10 hours internet on 3G, up to 10 hours on LTE, and up to 11 hours on Wi-Fi
  • Up to 11 hours video playback
  • Up to 50 hours audio playback

iPhone 5s battery life

  • Up to 10 hours talk time on 3G
  • Up to 8 hours internet on 3G, up to 10 hours on LTE, and up to 10 hours on Wi-Fi
  • Up to 10 days standby
  • Up to 10 hours video playback (up from 8)
  • Up to 40 hours audio playback

iPhone buying guide: Which iPhone is best for watching movies on the go?

For film fans, we recommend the iPhone 6s, iPhone 6s Plus, iPhone 6, iPhone 6 Plus, or even the iPhone 5, 5c or 5s because the widescreen display - with its 16:9 aspect ratio those models are ideal for a mini-cinematic experience. The older iPhones with their smaller 3.5in displays (aspect ratio of 3:2) don't suit widescreen viewing very well. The best choice, though, would be the iPhone 6s Plus or the iPhone 6 Plus with their larger 5.5in display.

Bear in mind that movies will quickly fill up storage, so the 64GB and 128GB models are probably worth the extra investment, although you can purchase a separate Wi-Fi storage device that you can use with your iPhone.

iPhone buying guide: Which iPhone is best for games?

This one depends on what kind of games you like. If processor-intensive graphical feasts like Infinity Blade are your thing - and if you intend to keep playing the latest games in the future - then the faster A9 processor will be a great investment, although the A8 processor with 64-bit support in the iPhone 6 and iPhone 6 Plus is no slouch.

Even the A7 chip (also 64-bit) in the iPhone 5s is no slouch when it comes to gaming.

The App Store contains games that will run only on the iPhone 5s or newer iOS hardware. If you love to play the newest, best-of-breed games, you may well miss out on those titles - or at least their full feature-set and performance abilities - unless you upgrade to Apple's top-of-the-line phones.

Our experience suggests that at least 32GB of storage is advisable for heavy gamers, although you can get by with less if you're willing to focus on a few games at a time, and uninstall them once you're finished. 

Read more in our best iPhone and iPad games feature.

iPhone buying guide: Which iPhone is best for business users?

Unless you’re desperate to show off the latest iPhone while networking, or are big fans of gaming and movies in their spare time, business users can probably get by with an earlier model; a super-fast processor will be wasted if your principal needs are email, contacts management and light browsing. 

However, the extra screen space is likely to prove useful if you are trying to produce documents and do other work on your iPhone and you don't already own an iPad. There are also some handy features on later iPhone models, such as the ability to make FaceTime calls over 3G and videoconference when outside Wi-Fi range: a handy option for the business-inclined.

iPhone buying guide: Which iPhone is best for sporty types?

If you already own a fitness monitor, or you are thinking of buying the Apple Watch (read: Apple Watch rumours, release date & images and our Apple Watch review), you may want to stick with an iPhone 5s or later, although the iPhone 5c does support the Apple Watch.

Apple introduced the M7 "motion coprocessor" chip with the iPhone 5s in 2013 and this chip works in sequence with a fitness monitor to track the data without over using the battery in your iPhone. The new iPhone 6s and 6s Plus offer the M9 chip while the iPhone 6 and iPhone 6 Plus offer an M8 chip. There is a Barometer in the newer 6 series models for blood pressure, not for telling what the weather will be like, the newer iPhones also boast this feature.

All Apple's iPad and iPhone models ship with iOS 9 and various apps provided by Apple for free. There are also thousands of apps available on the Apple App Store for you to download. Here are the 10 best apps for your new iPad or iPhone to get you started.

Here’s everything you need to know about Shopping at an Apple Store, Apple Online, and using the Genius Bar