The best app for training scales.

Show your utterances in notes. The expressible range is from C2 to C6.
Select the scale you want to generate from the piano keyboard and the corresponding sound will be played. It also displays notes on the staff.

We also prepared a training in which you can speak according to the randomly displayed notes in the specified scale.

If you can speak the scale freely, it will lead to a high score in karaoke.
It is also ideal for voice training.