iPhone Screenshots


Key+ is a handy tool for estimating the musical key of digital recordings and live audio. A must-have for musicians and DJ's, Key+ analyzes audio and returns both the key and it's relative major or minor signature.

What’s New

Version 2.4

*Fixed access to microphone. Sorry!

Ratings and Reviews

2.2 out of 5
22 Ratings

22 Ratings

kendaljharrison ,

Crashes Galore

For a paid app, I would expect maintenance to be regularly updated. This app not only had views that say that it isn’t accurate, but it crashes immediately after listening for me. All in all, this is the worst 2 dollars I’ve ever spent.

D-nice Gambino ,


I am a Audio engineer and every sense I ran across this app it have been a time saver for me for when I am recoding singers who need the auto tune in the right key. This app help me with the key that the song are in so I can set the key and note scale so the auto tune can correct the singer notes. This help me with hearing the key without using it but I still use this app to make sure.

MAs World ,

I like it

Works well, setting sample rate at a longer time helps.
It's not perfect but mostly correct, some songs are very complex and hard for software but most popular music songs work, I use it when playing harmonica!


Daniel Casady
3.9 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© Waves Media


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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