Metronome app
Metronome is Multimedia tool that is open source under the GPL-3.0-or-later license. A simple and modern Metronome Application for Android.This application provides you with all you'd expect from a metronome without added complexity.
The features are intentionally kept simple and usable:
1) The metronome itself.
2) Tap Tempo (to input those trickier tempos).
3) Saving and restoring presets (so you can switch between musical pieces easily).