What are some alternatives?
When comparing Flowkey and Pianu, you can also consider the following products
Simply Piano - Fast and fun way to learn piano
Synthesia - A fun way to learn how to play the piano.
Skoove - Babbel for learning the piano
Playground Sessions - Online piano learning game.
Yousician - An interactive guitar-learning app.
Musicope - The Piano Game. Contribute to oldrich-s/musicope development by creating an account on GitHub.