The organ clock app was the first app I wrote for iOS and is up to date still downloaded quite often. I wanted to try out Objective-C and see how much work it would be to publish an app on the iTunes App Store.
The inspiration for the app came when I was fetching the same book from the bookshelf again and again to look up the organ which, according to traditional chinese medicine, is currently the most active one. Wouldn’t it be easier if I could just take a look at my iPhone and the app would show me right away which organ is active and what the properties of that organ are.
This app also computes the solar time for your geolocation (i. e. the actual time of the day according to the sun).