Now in its version 2.0, ReactionFlash is a free app that provides information to hundreds of named organic chemistry reactions on your iPhone, iPad and iPod Touch. Designed like a set of flash cards, the app can be used as a learning tool as well as a reference. It is a good way to learn named reactions, understand their mechanisms and view examples published in peer-reviewed literature. You can also test your knowledge by trying out the questions in the quiz mode. ReactionFlash is available at the App Store.