Diatonic Chords by Key vs StringKit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Diatonic Chords by Key
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Key Chords turns music theory into chord shapes you can use. Explore the seven diatonic chords in major and natural minor keys, compare positions for guitar, ukulele, and Brazilian viola caipira, and keep a practical reference close while you practice or write. Explore chords by key • Choose a major or minor key and see its seven scale degrees with the matching chords. • Switch instruments to view the available shapes for guitar, ukulele, or viola caipira. • Save chord diagrams and diatonic chord sets as favorites on your device. • For guitar and viola caipira, choose to show an easier no-barre shape first when one is available. Find the shape you need Search the chord dictionary by symbol, instrument, or chord quality. Open a chord to compare the available fingering variations and use the clear diagrams as a quick reference during study or practice. Practice chord progressions Explore five familiar patterns, including I–V–vi–IV, ii–V–I, and I–IV–V, in different keys. Use them to practice changes, understand harmonic movement, or try ideas for your own music. Whether you are learning music theory, practicing chord shapes, or sketching a progression, Key Chords helps connect keys, degrees, and playable chords in one focused study tool.
StringKit
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Whether you're just picking up the guitar or already playing your favourite songs — StringKit gives you everything you need in one place. Tune your instrument, learn chords at a glance, and practice with a reliable metronome. No fuss, no distractions. CHORD LIBRARY The most important chords for guitar and ukulele, beautifully visualised as fretboard diagrams. Filter by beginner chords, open chords, major, minor, 7th and more. Search any chord in seconds. CHROMATIC TUNER Accurate and fast — works for guitar, bass and ukulele. Choose your instrument, and StringKit automatically detects which string you're playing. See exactly how many cents you're off and nail that perfect pitch. METRONOME Clean, reliable and easy to use. Set your BPM, choose your time signature and subdivision, and tap the tempo button to find your natural rhythm. A steady beat for every practice session.
Screenshots
Verdict
The clearest difference is iOS requirement: Diatonic Chords by Key at 13.6 against StringKit's 17.0. 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. Diatonic Chords by Key sells 1 one-off in-app purchase and StringKit sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | Diatonic Chords by Key | StringKit |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 36 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Mateus Polonini Cardoso | Enrico Weinhold |
In-app purchases
Diatonic Chords by Key
- Campo Harmônico Pro$2.99
StringKit
- Support StringKit$1.99
Questions
Is Diatonic Chords by Key free?
Is StringKit free?
Do Diatonic Chords by Key or StringKit have ads?
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