LockscreenEar is a lockscreen for people with perfect pitch.

Although this app is supposed to be a lockscreen, it is also an excellent tool to improve your musical ear, in fact, in the training mode, once you set the number of notes to be guessed at the same time, you can listen the output as mutch as you want and you will also get the solution from the lowest note to the highest.

Warnings: If enabled, the main service undertakes, after the device wakes up (e.g after the keyguard is gone), to