Ok, I'm not gonna lie. This app is really challenging. That being said, I think it's awesome. Learning to ignore a metronome is a terrible thing to do, but if you have done that, practicing with a metronome might not be very helpful for you. This app could potentially train you to mind your metronome again. So that's a big deal!
Even if you haven't learned to ignore a metronome, this app really keeps you on your toes and will get you keeping time better. Give it a try. It's free! Let me know how it goes for you. Like I said, it's tough and you'll see me struggle with it in this video too.