Key Lens vs Common Charts
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Key Lens
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Compose your next song! Sequence chords, melody and bass MIDI tracks. Connects to the rest of your setup. Play hardware synths or instruments in your DAW. Use Key Lens as a MIDI controller over USB or Bluetooth. Build better chord progressions. Find your starting point with common chord progressions from multiple genres. Give your chords movement. Use arpeggios and strum to shape how your chords play. Learn to play your chords on piano. Follow along on piano with easy-to-read charts.
Common Charts
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Common Charts helps worship leaders and musicians bring chord charts into one clean, flexible library for rehearsal and live performance. Import songs from Planning Center, plain text, or PDF chord charts, then organize them into setlists and perform with tools built for real services. Common Charts makes it easy to clean up charts, transpose keys, and keep lyrics and chords readable on stage. Terms of Use: https://commoncharts.30twelve.org/terms Privacy Policy: https://commoncharts.30twelve.org/privacy
Screenshots
Verdict
The clearest difference is update cadence: Common Charts at every 9 days against Key Lens's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Key Lens sells 1 one-off in-app purchase and Common Charts sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.
Key Lens ships an update every 6 weeks, Common Charts every 9 days. The most recent releases landed on November 13, 2026 and November 9, 2026 respectively.
| Parameter | Key Lens | Common Charts |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 15.1 — better |
| Further details — not scored | ||
| Size | 58 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Alex Amayo | Tim Morgan |
In-app purchases
Key Lens
- Midi Output$9.99
Common Charts
- Common Charts Plus Monthly$9.991 Month
- Common Charts Plus Yearly$99.991 Year
