# KeyLens — Scales, Chords & Progressions

> Scales, Chords & Progressions (iPhone/iPad app by Alex Amayo.)

- Source: https://appshunter.io/ios/app/keylens/id6761850903 (this page in markdown: same URL + `.md`)
- Developer: [Alex Amayo](https://appshunter.io/developer/1835625743)
- Category: Music, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.4 · 69 MB
- Languages: English
- Released: 2026-04-10
- Data updated: 2026-07-08
- User reviews in markdown: https://appshunter.io/ios/app/keylens/id6761850903/reviews.md

## What is KeyLens?

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.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Midi Output | $9.99 | one-time |



## Version history (last 4 releases)

### 1.3 — 2026-06-25

Improved general UI and chart view.
Introduced two octave Key playing zone.
MIDI connection over Bluetooth and USB.
Bug fixes and stability improvements.

### 1.2 — 2026-04-28

Chart view - piano diagrams for every chord in your bank. 
Visual refinements.
Octave alignment has been corrected so highlighted notes always land in the right place.
Chord inversion display is now accurate across all voicing combinations.
Fixed several edge cases across the chord and voicing panels..

### 1.1 — 2026-04-14

• Chord function colors — tonic, subdominant, and dominant                                     
    chords are now color-coded so you can see harmonic                                           
    movement at a glance                              
  • Chord legend — tap the info icon to learn what each                                          
    color means                                                                                  
  • Improved chord voicings — smarter inversion options                                          
    and correctly ordered extension symbols                                                      
  • Bug fixes and music theory improvements

### 1.0 — 2026-04-10

No release notes.

## More apps by Alex Amayo

- [VIP Genie](https://appshunter.io/ios/app/vip-genie/id6753199991)

All apps by Alex Amayo: https://appshunter.io/developer/1835625743

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-08.*