What are some alternatives?
When comparing Cloud Piano and Piano Academy, you can also consider the following products
Piano Companion - Chord & scale dictionary with libraries, reverse mode, etc.
Simply Piano - Fast and fun way to learn piano
Flowkey - The easiest way to learn piano with your iPhone or iPad
Touch Pianist - Play piano like a pro without playing piano.
Chroma - Welcome to Chroma Cutlery Cnife - Manufacturer of kitchen knives, includes products and contact information.
Touch Bar Piano - Play piano on the new MacBook Pro's Touch Bar 🎹