Annoying though they can be, if you play any kind of instrument, you will definitely benefit from using a metronome. While many of them thock or otherwise tock, the VRRVRR metronome from [Turi ...

It features a customizable interface with widgets like a digital tuner, metronomes, and audio recorder, and it’s an ad-free pay-once-and-its-yours affair. The app costs $0.99 cents right now ...