Very handy – TempoPerfect Review

I love this app, it's great for spending hours practicing to a click. The sound isn't as annoying as some metronomes and is definite enough to be useful. The only drawback is you have to turn auto-lock off on your phone or else the click will stop every time the phone goes to sleep mode. Hopefully they'll fix it in he next update.
Review by fan of Anberlin on TempoPerfect.