It would be good if there was a simple in-app metronome. Just tempo + time signature.
Since the app currently doesn’t appear to work while in the background, it’s a pain in the ass to have to switch to a different app to start a metronome, switch back to sensorware, then repeat every time you want to adjust the metronome. There’s the same hassle when trying to play along with background tracks, but that’s a more complicated problem. An in-app metronome seems like it would be a comparatively simple feature to add, but of high utility to many.