Geek Clock Tool is a free Android app developed by spwebgames.com that calculates and displays clock-related information for unusual time systems. This app is perfect for those who are interested in or curious about alternative time systems. It currently supports eight non-standard clocks, including Decimal, Dozenal, Hexadecimal, Binary, Degree, Chinese, 24-hour, and Standard Time. Impress and confuse your friends by showing them the time using these unique clocks.

The app is easy to use and comes with no ads. In addition, there are Android Widgets available, so you can put the clocks on your home screen. The app also has a companion app, Geek Calendar Tool, which is also worth checking out. Overall, Geek Clock Tool is a fun and educational tool for those who want to explore alternative time systems.