Find the key of any song or melody by playing it into your phone!

Based on modern pitch and key detection algorithms, Song Key Finder provides astonishing results. Great for bands, djs, singers, songwriters, tabulature transcribers, and anyone interested in learning how to play their favorite songs.

Supports all phone and tablet resolutions with sharp HD graphics.

What’s New

Version 1.1

updated for iOS 11

Ratings and Reviews

2.0 out of 5
4 Ratings

4 Ratings

ashhayes ,


No instructions on how to use it.

Misha Golin ,

Good algorithm, bad user interface

App includes a few great algorithms for finding the key of a song. I like how they show the correlations with several key options. These are some tried and true methods for key determination. However, I feel like the UI is lacking and the feature set is limited.

1). You can't change inputs. The app only works through the microphone. You can't find the key of songs in your iTunes library.

2). The activation of the listen button is clunky. It's hard to tell exactly what the app is doing at the time.

3). It would be very interesting to have an option use the key finder with all the algorithms at once and use their correlations to weight their top two keys. That way you could get a consensus of the algorithms and possibly decrease error.

It's an interesting app but limited in its ability and usefulness. A lot more work needs to be done before I could call it a powerful tool.

Sunshine71210 ,

Waste of money!!

I purchased this app because I need an app to help me pick out the key in a specific song stored in my iPhone. You can't play the song on the phone and have this app listen to it at the same time. What's the point of providing an app that will help you find the song key if you any play the song from the same device?!? Waste of money! I want my $1.99 back!!!


Polycene, Inc.
70.3 MB

Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

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

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