"A New Earth" iPhone app

Our first publicly available iPhone application is now available in the iTunes Store. It's an application for the book A New Earth by Eckhart Tolle. Working with our partners at Six Voices, we developed a framework called TapStack which provides a card-based system for viewing and navigating content on the iPhone. The application was designed to provide a very realistic sensation of working with a deck of cards.

You can check it out on iTunes.

There were some interesting experiences with iPhone development that we'll cover in future blog post. One useful tip to know is that the UIImage class will try to manage its own memory if you construct it using the initWithContentsOfFile: method. This means it will unload and reload the image from the file as needed, which can kill performance if you're dealing with a lot of offscreen images that need to be shown on screen quickly. Using initWithData: using an NSData will let you manage the memory yourself.