Money back
I need my money back. Does not work
Doesn’t seem to do anything
Would be awesome if it worked
Archived App (Last seen on 2 May 2025)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
Details
About
Instantly identify the musical key of any song using your device's microphone. This app analyzes audio in real-time, tracking key changes and displaying harmonic energy over time. Discover musical patterns and scales used in popular songs.
✓Real-time key detection
✓Tracks key changes
✓Dynamic harmonic analyzer
✓Auto-noise cancelling
✓Offline functionality
✓Built-in calibration
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What's New in Key?
1.0
October 28, 2020
User reviews
Developer apps
FAQ
What is Key? used for?
Key? is used to instantly identify the musical key of any song you are listening to. It can also track changes in key throughout a song, such as for choruses or bridges.
How does Key? work?
Key? uses a neural learning program that has analyzed thousands of songs. It utilizes your device's built-in microphone with auto-noise cancelling to detect the key in real-time, without needing an internet connection.
Can Key? detect key changes within a song?
Yes, Key? is designed to track and display any changes in the song's key in real-time, providing insights into its harmonic structure.
What is the dynamic real-time harmonic analyzer in Key?
The harmonic analyzer in Key? visually represents how note energy changes over time, with each column representing a different octave. This feature offers a hypnotic view of the song's harmonic progression.
Is Key? free to use?
No, Key? is a paid application. It is available for purchase at $0.99.
What devices is Key? compatible with?
Key? is compatible with iPhone, iPad, and iPod devices.
How often is Key? updated?
The application was last updated on October 28, 2020, with version 1.0. Further update frequency is not specified.
Does Key? have ads?
No, Key? does not contain advertisements. It is a completely ad-free application.
