My use case: little snippets of song ideas pop into my head while working, walking, etc., and I want to record myself whistling, humming, etc., so I can remember them when I have access to my instruments later.I used to use voice memos for this but, when I listened to them later, it could be difficult to remember what I was originally hearing in my head. Being able to record multi-track loops, basically in the same way as, eg, a guitar looper pedal, allows me to record something closer to the idea in my head, making the idea much easier to “hear” again later. LThe app is great and easy to use for this use case.The feedback: it would be great if the metronome sound could be clickier, a little less musical and a little more neutral/percussive. I find it *very* easy for my brain to interpret the current, beepy metronome sound, basically, as a tonic note. This makes it much more difficult to record my idea because my internal sense of what key I should humming or whistling in kind of evaporates.That said, awesome and easy to use app.