MotionMate app
MotionMate is Sports & Health tool that is open source under the GPL-3.0-only license.MotionMate is a very simple and lightweight step counter app for Android that tracks your daily steps and displays the results by selecting a specific day from the calendar view and presents the values in a nice weekly bar chart as well as some other statistics.
It uses the built-in step counter sensor, if it is present on the device and uses a fallback implementation based on the accelerometer sensor otherwise.
It requires no internet access and no special permissions.