A free program for Android, by bluestudioeditor.

AutoTune & Voice Recorder for Singing is an app for recording, editing, and sharing your voice, and audio. It lets you record, edit, and share audio in various formats.

Record

The first thing you need to do is to record your voice or sound using the built-in microphone or mic cable that you have. The recording time is limited by the mic and the phone, so you will need to use a fast microphone.

Pitch

The second thing is to change the pitch. This is the easiest and most natural thing to do, so don’t be afraid to change the pitch. The higher the pitch, the louder the sound will be.