Pages - $9.99

http://itunes.apple.com/us/app/pages/id361309726?mt=8

Compatible with iPhone, iPod touch, and iPad. Requires iOS 7.0 or later. This app is optimized for iPhone 5.

This app allows you to create, edit, and view documents. It automatically zooms in on text while you type and zooms back out when you’re done, so it makes writing and editing easy.

See more about this application. [1]