Great app. With the touch feature it even works well with my Samsung.
Are you able to utilize the TTS feature build in android or add sounds for the commands like "down", "back uo" , "hold" "break" ?
This Couleur make the app more accessibil. Especialy if you can signal the System that the Button on top is not a regulär Button for talkback double tap but requires direct input. If the second idea is not possible a blind mode would be creat where all commandos are read out by tts so that a blind user can deactivate talkback for the erxercise.