Multi Piano : keuwlsoft

Play up to 4 pianos simultaneously on one device. Choose one of 8 arrangements to suit your needs, whether playing alone or with friends. Notes played are highlighted on the other pianos to make teaching a new tune easy. Slide the bar below the piano to access higher or lower pitch notes.

Features:

Multitouch
8 Piano arrangements with up to 4 pianos to choose from.
Adjustable piano key width.
Highlights note played on other pianos to make teaching easy.
Pianos keys range from C1 to C8.

(Note that C1 to C3 will be quiet on most device onboard speakers, play through headphones or a sound system for better sound quality)