Toc Toc Metronome "Pro" - Stay on the beat! Toc Toc Metronome Pro is a 100% ad-free full featured electronic Metronome for your android smartphones and tablets. This unique Metronome comes with all the features provided in the free version but without annoying ads. BPM/Tempo settings. "Tap Tempo" feature. Time Signature. Beat Subdivision setting.