What are some alternatives?
When comparing Piano Notes Fun and MuseScore, you can also consider the following products
Yousician - An interactive guitar-learning app.
Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
Simply Piano - Fast and fun way to learn piano
Guitar Pro 7 - Create, play and share your tabs
Melodics - Melodics is a desktop app that teaches you to play MIDI keyboards, pad controllers, and drums.
Finale - Finale, the world standard for music notation software, lets you compose, arrange, notate, and print engraver-quality sheet music.