Apple has issued updates across its entire suite of iWork productivity apps for Mac, iPhone, and iPad. These updates for Keynote, Numbers, and Pages bring compatiblity for Apple's latest operating systems and devices, new tools, templates, and more.
On the Mac, Keynote, Numbers, and Pages all receive support for full screen Split View on OS X El Capitan. Both Keynote and Pages can also open documents from their 2006 and 2008 counterparts, while Numbers can open spreadsheets from Numbers '08. There have been improvements made to compatiblity for Microsoft Office, along with many other improvements.
On iPhone and iPad, the iWork apps now support new features in iOS 9, including iPad Split View and Slide Over multitasking. The apps also support 3D Touch on the iPhone 6s and 6s Plus. Like their Mac counterparts, these apps also support reading older Pages, Numbers, and Keynote documents.
The apps for both iOS and Mac feature improved support for Apple's VoiceOver accessiblity feature. Additionally, iWork for iCloud is now out of beta, and includes support for commenting in 10 new languages. Additionally, you can now preview shared documents in web browsers on both iOS and Android.
You can find all of these apps for free on the iOS or Mac App Stores.