I'm not a ukulele expert but I am a dedicated enthusiast. I also have experience reviewing many other ukulele apps because I've tried many of them. There are more than you would expect, with many of them being not so great in my opinion. However, I've also written a few reviews for this site on ukulele apps so that you can see which ones I really like too. If you have a ukulele, then you need to know how to take care of it and tune it, in addition to learning how to play. This app helps with all of these functions and more. I consider this an essential ukulele app because it's perfect for tuning and teaching. A must have.