Tap a key to play it. Slide one finger to glide between keys. Press several keys for a chord.
Drag two fingers sideways to move along the keyboard (all 88 keys). When you let go it settles on whole keys.
In portrait the two rows are one keyboard: the top row picks up where the bottom row ends.
Tap the range button at the top left to jump back to your part.
Sustain lets notes ring after you lift your finger. Tap the note readout to hear the last note again.
Use your phone's volume buttons for loudness. There is no volume setting in the app.
Install it as an app: tap Install when it shows up, or use your browser menu and choose Install app or Add to Home screen. After the first visit it works offline.
Source and fork on Kody
This app is built and hosted with Kody. Its code is public and MIT licensed, so you can read it or make your own copy.