That's a funny instrument! I'm definitely getting one of these since I'm a terrible singer but I always have a tune in my head that I need to hum out loud.

A few ios app recommendations I'd like to make are:

- Rassel (a free and absurdly accurate pocket shaker app) https://apps.apple.com/us/app/rassel-pocket-shaker/id1575364...

- Ableton Note (Best 6 dollars I ever spent. It's a really fun way to experiment with musical ideas on the go. You can even record vocals and add effects.) https://apps.apple.com/us/app/ableton-note/id1633243177