It is very difficult to figure out how to get the app to work because the directions are impenetrable, for starters. After messing around with it for a couple weeks here and there, I was finally able to program a 6/4-5/4 pattern into the thing. Or so I thought. As I pressed the play button, the screen went blank, and the app froze. Now, I tap on the app, I get a blank metron screen, and then back to the home screen after a few seconds. I wrote the company two weeks ago and they did not respond. Im deleting the app after I finish this review.
I would recommend frozen ape tempo 2. It will do mixed meters and is reasonably easy to figure out how to use.
Allston J about Metron (Pro Metronome)