Eyes-free mode

[ppetru]

The app currently requires the user to stare at their device, which is not always possible or pleasant.

Especially on mobile devices, there are several other ways of interaction that could be used: accelerometer, vibration, speech synthesis, speech recognition. It would be interesting to try them out and make it possible to practice without looking at the screen.

For example, the user could control the app by knocking on their phone once or twice, and the app could respond via speech synthesis or by vibrating.