What are some alternatives?
When comparing Cloud Piano and Touch Bar Piano, you can also consider the following products
Piano Companion - Chord & scale dictionary with libraries, reverse mode, etc.
Touch Bar Nyancat - Nyancat on your MacBook Pro's Touch Bar #innovation
Simply Piano - Fast and fun way to learn piano
Touch Pianist - Play piano like a pro without playing piano.
Touch Bar Timer - A little stopwatch for your Mac's touch bar
Piano Academy - Play your favorite songs