Binary Clock is an educational application available on the iPhone platform. The app, developed by Aaron F Stephenson, falls under the category of Education & Reference. It offers a unique way of telling time through circles that change from one shade of blue to another, representing binary time.

The app includes features such as the ability to change the color of the circles, a tutorial for learning to read binary time, and functions as a watch app. While mastering binary time may be a challenge for some users, the informative tutorial provided within the app aims to help users quickly grasp this fascinating method of time-telling.