A free program for Android, by iSing Sp. z o.o..

iSing is a karaoke app for Android that allows you to sing with high-quality backing tracks. You can use it anywhere, anytime, and with any device. If you want to sing with the best quality, then you should download this app.

The iSing app has a simple user interface. All you have to do is to select a song, and you can start to sing. You can also record your own voice. When you’re done recording, you can save the audio file to your library. You can also watch the recordings of other people. This is a great way to get an idea of how the song is supposed to be sung.