This is the mobile version of Philippe Chrétien's awesome Fibonacci Clock, which uses the Fibonacci sequence to display time. You can view his project on Kickstarter:
https://www.kickstarter.com/projects/basbrun/fibonacci-clock-an-open-source-clock-for-nerds-wit
The Fibonacci Clock app has a customizable clock display and the possibility to test your clock reading abilities with the Fibonacci Clock game.
The Fibonacci Clock is also available as a widget so you can have it directly on your home screen!