Looking for free iPhone apps? Here we continue our guide to the best free apps for iPhone, covering news, photography, entertainment, work and social apps.

Our next category is:

Work, office, business & productivity apps

Adobe Acrobat Reader

On your iPhone you'll already be able to view and synchronise PDF documents via Safari and iBooks, but if you're looking for that extra bit of functionality, Adobe Acrobat Reader adds that zing - in other words, allows you to edit and annotate PDF Files.

FREE | Download Adobe Acrobat Reader

Best free iPhone apps: Acrobat Reader

Any.DO

Any.do is a free productivity app for iPhone that delivers in just about every way. It's great to look at, easy to use, and effective at helping users get stuff done. In either the category or schedule view, the task list is presented in a clean, spare format, and Any.Do has many layers of organisation. It's both easier to use and more pleasing to look at than the native Reminders app in iOS.

FREE | Download Any.DO for iPhone

Best free iPhone apps: Any.do for iPhone

Dictionary.com

Sometimes we forget how to spell a word and other times we want to know the meaning or origin of a word. Dictionary.com's app enables you to find any word you desire and has a fantastic user-friendly interface that makes it easy to navigate on your iPhone.

FREE | Download Dictionary.com for iPhone

Best free iPhone apps: Dictionary.com

Documents

Documents is, as the name suggests, an app for keeping your documents in one convenient place, particularly when on the move. Those documents include text, audio, music files and web and email content. It's been awarded 'Editors' Choice' by Apple in more than 70 countries, which is a fair reflection of the app's quality and usefulness.

FREE | Download Documents 5 for iPhone

best free iPhone apps

Dropbox

Dropbox's cloud service lets you store and sync files online, so they're accessible from multiple computers. And with the company's free iPhone app, you can access your Dropbox files on the go.

It's a reliable and user-friendly offering. But Dropbox has an ace up its sleeve in the form of Photo Uploads. Install the Dropbox iOS app and switch this on and any pictures snapped in your iPhone will be copied to your Dropbox cloud storage, making it easy to quickly view the files and share them with other people.

FREE | Download Dropbox for iPhone

Best free iPhone apps: Dropbox

Evernote

This note and snippet managing service lets you type text notes and take photo notes with your iPhone's camera. After you capture a note, Evernote automatically uploads everything that you put into it to the company's servers, where your notes are indexed for easy search and retrieval, and become available for syncing to all your devices. Fast, smooth and extremely functional.

FREE | Download Evernote for iPhone

Best free iPhone apps: Evernote

Microsoft Excel

Excel is used all over the world to view and edit spreadsheets, it's available on your iPhone too - a worthy recommendation. However, you'll only be able to view spreadsheets via the app, as if you want to edit or create them you'll need an Office 365 subscription.

FREE | Download Microsoft Excel for iPhone

Best free iPhone apps: Microsoft Excel

Microsoft PowerPoint

PowerPoint is used all over the world to view and edit presentations, and is available on your iPhone too. However, you'll only be able to view presentations via the app, as if you want to edit or create them you'll need an Office 365 subscription.

FREE | Download Microsoft PowerPoint for iPhone

Best free iPhone apps: Microsoft Powerpoint

Microsoft Word

Word for iPhone is a worthy recommendation. However, as with the other Office products on iPhone, you'll only be able to view documents via the app, as if you want to edit or create them you'll need an Office 365 subscription.

FREE | Download Microsoft Word for iPhone

Best free iPhone apps: Microsoft Word

Slack

Everyone's using Slack by now, aren't they? Well, possibly not. But there are certainly a lot of workplace teams out there who could benefit from it.

Slack is a simple private messaging system, organised by team (your colleagues) and then subdivided by channel (specific areas of interest). Anyone who is a member of a channel can post and read messages on it, and invite other members of the team to join.

You can leave channels, you can mute them, you can dip in and out; it's a clever and highly customisable way of organising the way various parts of your team can let each other know what needs doing - and post web links, images and documents too, where applicable.

The iPhone app, which is also free, makes it easy to stay in touch, but not overwhelmed, when you're out of the office. Although judicious use of the app-specific do not disturb feature is recommended.

FREE | Download Slack

Best free iPhone apps: Slack

XE Currency

Having the ability to convert money on the fly, using the latest exchange rate (provided you've connected to the internet at some point) is extremely handy. The app is useful especially when you're abroad and want to know the conversion rate or even how much the currency exchange booth is ripping you off by.

FREE | Download XE Currency for iPhone

Best free iPhone apps: XE Currency

Want more brilliant free iPhone apps? The list continues on the next page!