StagesPower is a free Android app developed by Stages Cycling LLC that helps you to maximize your cycling power meter performance. It is an excellent app that allows you to quickly display power and cadence values, perform a zero calibration to ensure accurate measurements, and update the firmware with the latest features and functionality.

The app is user-friendly and easy to use. With its read-only power and cadence display feature, you can easily monitor your cycling performance. The zero calibration functionality ensures that your measurements are accurate, and the firmware update capability ensures that you have access to the latest features.

One of the app's requirements is permission to write to USB storage to save high-speed data files. However, this does not affect the app's performance in any way. Overall, StagesPower is an excellent app for anyone who wants to maximize their cycling power meter performance.