Comparison

Diatonic Chords by Key vs Ear training

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Diatonic Chords by Key

Features
Read full description

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.

About

Ear training

Develop perfect pitch and recognize notes, chords, and melodies by ear. This app offers a series of exercises to train your aural skills, with explanations and hints to help you learn at your own pace. Improve your ability to play along with songs or guess melodies.

Highlights
  • Develop perfect pitch
  • Recognize notes and chords
  • Identify intervals and chord progressions
  • Learn major and minor scales
  • Instrument-specific practice
  • Hint function
Features
Read full description

Would you like to be able to guess melodies by hearing them or be able to play accompaniment to your favorite songs on the guitar or piano? Ear training is the perfect app for you! This app will help you develop perfect pitch, and train your ear to recognize notes and chords in any key. The app consists of a series of exercises, which will gradually introduce you to all the notes and chords in the major and minor scales. You can also practice identifying intervals and chord progressions. Each exercise is accompanied by a clear and concise explanation, so you can understand the theory behind it. And if you get stuck, the app includes a handy hint function. The exercises are tailored to help you improve your aural skills, so you can develop at your own pace. You can also choose to practice in a particular key, or with a particular instrument. So why wait? Start training your ear today!

Screenshots

Diatonic Chords by Key4 screens
Ear training4 screens

Verdict

The call

The clearest difference is in-app purchases: Ear training at none against Diatonic Chords by Key's 1. Diatonic Chords by Key's advantage is ads (none vs shown) and update cadence (every 5 days vs every 8 months). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Diatonic Chords by Key sells 1 one-off in-app purchase. Ear training asks for nothing beyond the download.

UpkeepUpdate frequency

Diatonic Chords by Key ships an update every 5 days, Ear training every 8 months. The most recent releases landed on October 25, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
Diatonic Chords by Key versus Ear training: the parameters behind the verdict, then further details
ParameterDiatonic Chords by KeyEar training
PriceFreeFree
Rating—4.5 (248 ratings) — better
Positive reviews—32.6% of reviews
Number of ratings—248 — better
Update frequencyEvery 5 days — betterEvery 8 months
AdsNo — betterYes
In-app purchasesYesNo — better
Monetization—Ad-supported
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.6 — better15.6
Further details — not scored
Size36 MB41 MB
Age rating4+4+
DeveloperMateus Polonini CardosoAlexey Ovod

In-app purchases

1 purchases

Diatonic Chords by Key

One-time1
  • Campo Harmônico Pro$2.99
None

Ear training

No in-app purchases

Questions

Is Diatonic Chords by Key free?
Diatonic Chords by Key is free to download, with in-app purchases available.
Is Ear training free?
Ear training is free to download, with no in-app purchases.
Do Diatonic Chords by Key or Ear training have ads?
Ear training shows ads; Diatonic Chords by Key does not.
Which is updated more often, Diatonic Chords by Key or Ear training?
Diatonic Chords by Key ships an update every 5 days, and Ear training every 8 months. Most recently, Diatonic Chords by Key was updated on October 25, 2026 and Ear training on November 3, 2026.

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