A free app for Android, by Synthesia LLC.

Have you ever wondered how it is to play your favorite song on a real piano? Have you ever wanted to play the piano with your friends, family, or even with your kids? Now you can! With Synthesia, you can do just that!

Synthesia is a free, fun, and easy-to-use piano app that allows you to learn to play piano by heart! Just tap and swipe your fingers across the screen to play your favorite song.

The free app comes with a selection of music, including many piano songs. But you can also choose to unlock the full version and get access to more songs, new instruments, and new gameplay elements!

In the full version, you can practice with a metronome and listen to the correct notes to help you play the song.