Coffee Piano

Dont know how to open it but looks good.

Best piano extension I've ever used. It works great with my piano keyboard, and it is very user friendly and direct.

Great app for practicing and learning chords and chord progressions with a lot of possibilities. Highly recommended for any musician.

I really like this tool, it’s very helpful for learning piano chords and create new chord progressions

This is a great virtual piano and an excellent tool to learn chord progressions and create music! 5 stars!