What are some alternatives?
When comparing Jameasy for Violin and Simply Piano, you can also consider the following products
Yousician - An interactive guitar-learning app.
Flowkey - The easiest way to learn piano with your iPhone or iPad
Pianu - Learn to play the piano in your browser.
alphaTab - alphaTab is a cross platform music notation and guitar tablature rendering library.
Touch Pianist - Play piano like a pro without playing piano.
MyMusicTeacher - MyMusicTeacher is an excellent music learning application that allows you to get access to its revolutionary guitar lessons, from beginner to an advanced level.