What is The Diary, and why should I own one?

The Diary™ is an iOS app (download for free on the Apple App Store), as well as a web-based application and personalized service center that helps you collect, understand, manage, and tell your health story. You own all the data in it, and you completely control it. It is a way to record information about all aspects of your health, and then see that information graphically. You can share portions or all of your Diary with anyone you want, so they will have exactly the same view of your health that you have.