Appendix A. Installing and Upgrading iWork
Installing iWork on your Mac or iOS device is a fairly straightforward process—essentially, you grab both sets of apps from the App Store, which comes preinstalled on your Mac or iDevice (see the box below). This appendix explains the details of the installation process, as well as how to install iWork for iOS apps on multiple iDevices, how you might be entitled to free iWork apps, and how to keep your apps up to date.
But before you can install iWork anywhere, you need an Apple ID.