What are some alternatives?
When comparing Yousician and Melodics, you can also consider the following products
Simply Piano - Fast and fun way to learn piano
Flowkey - The easiest way to learn piano with your iPhone or iPad
TuxGuitar - A Multitrack tablature editor and player.
Playground Sessions - Online piano learning game.
Pianu - Learn to play the piano in your browser.
Synthesia - A fun way to learn how to play the piano.