Giving it five stars because 1) as a traditional pan-Celtic fiddler I was looking for an app like this, and 2) the app is free. It just needs a couple of things to be great.
1) Needs some BASIC rhythms, e.g. a selection of basic reel and jig rhythms. (Organized into groups, ideally). The loops provided are interesting and creative, but very few of them are useful for backing.
2) This is a bit of a nitpick, but what’s up with the volume slider? No bpm indication and the thing goes up way too high— it’s like the speedometer on my old Toyota Scion.