Free metronome Even better Accurate Beat Timing than the other non-free apps Get musebook metronome m10. MuseBook Metronome M10 is the app you can get higher accurate beat timing than the other apps. M10's beat timing is very precise with any tempo so that you can get stable beats that allows you to feel very comfortable. And the best thing is "It's free!" You can check out a beat timing comparison graph and a demo video on our website, or by using this link.