Auto-Key | Music key detection 4+

Music key and scale detection

Antares Audio Technologies, LLC

    • 4.0 • 67 Ratings
    • Free

iPhone Screenshots


Detect the musical key of any tune whether in the studio or on the go. Instantly share and sync the musical key with your Auto-Tune session running on your computer DAW.

Auto-Key detects the key by capturing a few seconds of audio and returns the most likely musical key. It also returns the diatonic key.

You can use Auto-Key mobile on any audio coming from a speaker or from an acoustic instrument or a voice. Tap on the Auto-Key logo in the app home screen to find the key.

Auto-Key Mobile was developed by Antares Audio Technologies, the inventors of Auto-Tune®.

What’s New

Version 1.1.0

- Send to Auto-Tune® functionality added for Windows
- VoiceOver support

Ratings and Reviews

4.0 out of 5
67 Ratings

67 Ratings

Qventxn ,

Not always right

I love this app, the idea of an auto-key finding app, and how you can integrate it with Auto-Tune. But, it isn’t always right. I played it over a track I made (B♭M/Gm) and it recognized it as E♭M/Cm. I started over at least 10 different times, and only one of those times it was correct. Makes me wonder how accurate it is on tracks that I didn’t make, or tracks that I’m mixing for somebody. The first chord is literally B♭ Major, and there is no A♭ in the song whatsoever. So I’m not sure how it got it wrong. I know this is a new app, I’m sure this may be fixed soon.

Developer Response ,

Thanks for taking the time to share your thoughts. We’re pleased to hear that you’re enjoying Auto-Key Mobile! rest assured that we are continuously working on improving the app for a better user experience. You may also check our Auto-Key Mobile FAQ page here:

i have to make a screen name? ,

Mostly accurate, but not always

The app works pretty well and usually gets the key right. But I noticed when I was testing it that it doesn’t seem to be able to recognize modes other than major and natural minor. It will give you a key that has the same number of flats or sharps, but with the wrong starting note. For example, I tested it with a song in Bb Dorian, and it told me that it was Ab Major.
Other than that, it works just fine.

ղօҍօժվ ցɑʍҽɾ ,

I desperately need an update for your previous “Auto-Tune mobile app”!!

I use Auto-Tune mobile to make music but an updated version of garageband causes the auto tune to be pitched up roughly 50 cents and is unbearable. I have to use an old ipad to create music at this point. It was worth the money and the best Auto-Tune app i have ever installed but i am quite dissatisfied with this mishap and hope it will be fixed soon. Thank you so much!! 😄

Developer Response ,

Thank you for sharing your honest feedback! Sadly, we no longer support the specific Auto-Tune Mobile app, and have no plans to do so in the future. However, in addition to the newly released Auto-Key mobile app, we are committed to releasing new and exciting mobile apps in the next few months. Please sign up for our newsletter here:
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App Privacy

The developer, Antares Audio Technologies, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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