The app has 2 modes: 1. Notes Explorer 2. Notes Trainer. The 'Notes Explorer' lets you find the music notes on a ukulele in interactive way! When you point to a note on a virtual page, UkuleleNotesFinder will show you where this note is on a ukulele and the other way around, if you click ukulele fretboard, you will see the corresponding note and hear the sound it makes.