Demo Video is here:
This app is a speedometer based on the "Schumi Widget", which you can read about here: https://tinyurl.com/zynbeny
The app will show your current speed, as well as the maximum speed from the last straight away and the minimum speed achieved in the last turn. The app resets tracking max and min speeds when you apply more than 60% brake.
Please let me know if you have any suggestions to make it better.