KeyLens
Scales, Chords & Progressions
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
Build expressive chord progressions. Play them on any DAW, synth, or groove box over Bluetooth or USB. Learn your progressions on piano with easy-to-read diagrams.
Audition a key, choose a scale, pick from chords that fit, then explore voicings and inversions until it feels right.
Connect to anything:
Pair with any DAW, synth, or groovebox over Bluetooth or USB. KeyLens connects as a standard MIDI controller — no extra plugins, no fuss.
MIDI controller:
Trigger combined chords and keys locked to your scale, Use the split MIDI channels to drive multiple instruments at once.
Learn it on piano:
An easy-to-read chart view shows you exactly which chords you're playing, so you can perform every progression on piano with confidence.
Save chord your progressions and instantly pick up where you left off.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Improved general UI and chart view.
Introduced two octave Key playing zone.
MIDI connection over Bluetooth and USB.
Bug fixes and stability improvements.
The developer, Alex Amayo, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Alex Amayo
- Size
- 72.4 MB
- Category
- Music
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Midi Output USD 11.99
- Copyright
- © 2026 Alex Amayo