Auto-Key Mobile is a free multimedia application developed by Antares Audio Technologies LLC for Android 9.0. It allows you to detect the musical key of any tune whether in the studio or on the go. With this app, you can instantly share and sync the musical key with your Auto-Tune session running on your computer DAW.

The app detects the key by capturing a few seconds of audio and returns the most likely musical key, as well as the diatonic key. You can use Auto-Key Mobile on any audio coming from a speaker or from an acoustic instrument or a voice. Simply tap on the Auto-Key logo on the app home screen to find the key.

Overall, Auto-Key Mobile is a useful tool for musicians and producers who need to quickly detect the key of a song. It is user-friendly and accurate, and its integration with Auto-Tune makes it a valuable addition to any music production workflow.