Apple has had a busy 2013. We've seen the release of the iPad AirRetina iPad miniiPhone 5s and iPhone 5c as well as the launch of a new Mac Pro and an update to the iMacRetina MacBook Pro and MacBook Air. We've also seen new software from the company, including iOS 7 and OS X Mavericks. Here, we recap Apple's April, which included software updates, Antennagate cheques, quarterly earnings call and leaked iPad Air parts that later proved to be real.

On 4 April, Apple quietly rolled out an App Store update to highlight apps' recommended age ratings based on their content. The tweak was part of Apple's push to offer more App Store transparency, after an incident earlier in the year that saw Twitter's Vine video sharing app, which was Apple's 'Editors' Choice' at the time, accidentally feature pornographic content as an 'Editor's Pick'.

Apple's war with Samsung continued in April, too. Early in the month, a US International Trade Commission judge ruled that a handful of Samsung smartphones infringed an Apple patent on text selection.

Reliable rumours

April was also the month of many Apple leaks, which later proved to be considerably accurate. Talk of multiple colours and prices of iPhones began to emerge, while the first photos of an iPad mini-like 10in iPad display panel showed up online.

Apple board member Bill Campbell sparked rumours of an iWatch in April, after he spoke about "intimate" tech during an internal event.

On 16 April, Apple updated iPhoto and Aperture for Mac, bringing improvements and bug fixes to Photo Stream. The company also updated Java and Safari to boost security.

Apple designer Sir Jony Ive was named in TIME's 100 Most Influential list that same week, accompanied by a short piece by U2 frontman Bono, who later in 2013 worked with Ive on a charity auction. Bono described the London-born designer as "classic Apple," which he says is "polished" and "honed to simplicity."

Apple CEO Tim Cook made the list last year and the late Apple co- founder Steve Jobs was included five times during his life.

iPhone 4 owners who suffered from Antennagate in 2010 got their long-awaited settlement cheques from Apple in April, costing Apple an estimated $175 million.

With the cheque, customers will received an explanatory letter, part of which, reads: “Enclosed is a cheque in the amount of $15.00 representing your settlement award in the Apple iPhone 4 Settlement Class Action Settlement. The amount of your settlement award has been calculated pursuant to the terms of the Settlement that was approved by the court.”

April earnings call

On 23 April, Apple reported its earnings for the March quarter of 2013. The company posted $43.6 billion in revenue for the quarter, with net profit of $9.5 billion. Apple enjoyed a record revenue for the quarter thanks to solid levels of iPad and iPhone sales, and the strongest-ever quarter for its iTunes store. Mac sales remained flat, with just under 4 million sold in the quarter. There was a slight drop year over year, but a minimal one.

Excitingly, also during the earnings call, Apple's Tim Cook revealed that the company is working on "amazing" new products in "exciting new product categories" in 2014.

In addition, the CEO said that Apple won't launch a bigger iPhone until trade-offs can be avoided, and insisted that, while competition is tough, Apple's products are the best by far.

Tickets for Apple's WWDC 2013, which took place in June, went on sale on 25 April, and sold out within two minutes. The company hinted at iOS 7 and OS X 10.9 in its invitation to the event.

See also:

Apple's 2013 in review: September brings iOS 7, iPhone 5s and iPhone 5c

Apple's 2013 in review: August brings legal victories and defeats, and a much-anticipated Steve Jobs movie

Apple's 2013 in review – July: iWatch trademark, iOS 7 betas, court cases and Logic Pro X

Apple's 2013 in review: June brings the Apple price fixing trial, Mavericks, Mac Pro at WWDC, Ive, Woz and more

Apple's 2013 in review: May brings a new iPod, tax arguments, BBM for iOS and a blockbuster Tim Cook speech

Apple's 2013 in review: April gave us our first (unofficial) glimpse at the iPad Air

Apple 2013 in review - March: Woz wisdom, Mac Pro banned, iPhone trademark dispute

Apple's 2013 in review: February brings milestones, a bumper dividend and yet another lawsuit

Apple's 2013 in review: what Apple did in January

The Complete Guide to the iPhone 5s & 5c is on-sale now. Click here for buying information.