What are some alternatives?
When comparing Piano Notes Fun and Chroma, you can also consider the following products
Yousician - An interactive guitar-learning app.
Pixie - Pixie is a free, open source web application that will help you quickly create your own website. Many people refer to this type of software as a content management system (cms), we prefer to call it a small, simple, website maker.
Simply Piano - Fast and fun way to learn piano
Drop - Beautiful color picker with Touch Bar support
Melodics - Melodics is a desktop app that teaches you to play MIDI keyboards, pad controllers, and drums.
Just Color Picker - Free portable colour picker and colour editor for web designers, photographers, graphic designers and digital artists. Supports Windows and macOS.