I use this app every day while practicing. I particularly love how the screen stays up and its so easy to change drones. I love love love that the metronome changes by one interval and not standard "set" metronome markings. Particularly helpful when practicing lip trips or hard technical things that need to start slow and slowly work up to tempo. Great App!! Highly suggest it to friends all the time.
Slgagnon about Tunable – Tuner & Metronome