A new Dropbox-enabled text editing program lets users shift between their iPhone, iPad and Mac computer while composing documents.
Both the mobile and computer versions of the app also include a snapshots feature to let users save version histories of their in-progress documents. The mobile version also features TextExpander support, and documents can be created both on- and offline.
A Dropbox account is required in order to sync documents. Compositions for iOS costs $1, and is compatible with devices running iOS 4.2 or later. Compositions for Mac is free, and compatible with computers running OS X 10.6.6 or later.