Comparison

ChordProg Ear Trainer vs Oolimo Guitar Chords

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

Head to head
About

ChordProg Ear Trainer

This app offers a realistic music training experience by using real audio clips to teach chord progressions, intervals, chords, and scales. It provides over 500 audio clips for practice and is designed to help prepare users for ear training tests.

Highlights
  • Chord progression recognition
  • Interval recognition exercises
  • Chord recognition exercises
  • Scale recognition exercises
  • 500+ real audio clips
  • Music theory exploration
  • Regular updates with new features
Features
Read full description

Learn to recognize chord progressions by ear with real recorded music. ChordProg Ear Trainer has exercises for chord, interval and scale practice, from identifying individual sounds to following a whole progression. Listen to a clip and name the chords in order. Replay a passage when you need another listen, and switch between chord names and Roman numerals to practice recognizing each chord's role in the key. More than 500 recorded clips give you practice across different keys and voicings. Focus on the sounds you want to recognize. Practice telling chord types apart, hearing the distance between two notes or identifying a scale as it plays. Work through short levels and return to the ones you find difficult. Your results and daily streak help you keep track of your practice. When you want to understand what you heard, look it up in the chord, interval and scale dictionaries. You can also tap notes on the piano to find matching chords and scales. Try introductory levels without a subscription. Premium gives you full access to the chord, interval, scale and chord progression exercises through an auto-renewing monthly or yearly subscription. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Oolimo Guitar Chords

This app provides an interactive way to learn, understand, and master guitar chords. It offers a structured approach to chord theory, helping users visualize and hear harmonic relationships. Features include a chord finder, analyzer, progression explorer, interactive lessons, and quizzes.

Highlights
  • Interactive chord finder and analyzer
  • Chord progression visualization
  • 22 interactive theory lessons
  • Chord construction and ear training quizzes
  • Interactive fretboard and diagrams
  • Chord playback and note display
Features
Currently charting
Read full description

Oolimo is the interactive foundational reference for guitar chords – a learning and lookup app that explains chords clearly, supports songwriting, and inspires fresh sounds on the guitar. – No subscription! Pay once – use it forever and receive updates. – Current languages (included in every app): English, German, Spanish, French, Italian, Dutch, Danish, Norwegian, Swedish, Portuguese (Brazil), Portuguese (Portugal), Chinese (Simplified), Indonesian, Japanese. Learn guitar chords and chord symbols as used by professional guitarists in modern pop, rock and jazz – including complex jazz chords. Let the Chord Analyzer name chords you've discovered on the guitar and show you how they are built. – Chord Finder, Chord Analyzer and music theory in one app. – Learn and understand chords – Read chord symbols confidently (including complex jazz chords) – Analyze chords instead of guessing – Apply music theory directly on the fretboard Oolimo clears up nonsense chords and incorrectly or confusingly written chord symbols, and explains with clear logic how chord symbols (chord names) are written unambiguously and how to correctly interpret different notations. When musicians from all over the world play together, it's important that everyone speaks and understands the same language – and that the language is easy and clearly understandable. — The Modules — Chord Finder Find musically meaningful chords instead of random guitar shapes. All fingerings come from a hand-curated database of playable voicings and are intelligently transposed by an algorithm. Every chord adapts automatically to the selected key. With a single tap you can send shapes directly to the Analyzer and explore inversions and different interpretations of the chord. Chord Analyzer Enter any guitar chord into the virtual fretboard and instantly get the correct chord name, including inversions. No "unknown chord" messages thanks to the intelligent recognition algorithm – even for complex chords, slash chords and inversions. The Chord Analyzer also supports alternative tunings (open tunings). Chord Progressions Explore and compare the most important chord progressions with an innovative matrix that visualizes harmonic functions and relationships. Practice the most important progressions systematically in different keys and variations – and master them so well that you can rattle them off in rehearsal to the amazement of your bandmates. Theory Lessons 22 interactive lessons with smart visualizations explain intervals, chord construction, voicings, slash chords, diatonic harmony and all major chord types – from first explorations on the fretboard, through major, minor and dominant 7th to altered, sus, add, 6th and diminished chords. Quizzes Use the quizzes to test and internalize your knowledge through play. The quiz tasks cover many topics: chord construction, intervals, harmonic context, chord types, voicings, tensions and much more.

Screenshots

ChordProg Ear Trainer4 screens
Oolimo Guitar Chords4 screens

Verdict

The call

The clearest difference is price: ChordProg Ear Trainer at Free against Oolimo Guitar Chords's $5.99. ChordProg Ear Trainer also leads on update cadence (every 5 days vs every 6 weeks) and iOS requirement (14.0 vs 16). Oolimo Guitar Chords's advantage is in-app purchases (none vs 2) and rating (4.8 vs 4.4). On ads 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

ChordProg Ear Trainer is free to download; Oolimo Guitar Chords costs $5.99 up front. ChordProg Ear Trainer sells 2 in-app purchases, starting at $2.99 per month. Oolimo Guitar Chords asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Oolimo Guitar Chords holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: Oolimo Guitar Chords has 105 ratings behind it against 16, so its average is the more settled of the two. Written reviews point the same way: 75% of ChordProg Ear Trainer's written reviews are positive against 92% of Oolimo Guitar Chords's.

UpkeepUpdate frequency

ChordProg Ear Trainer ships an update every 5 days, Oolimo Guitar Chords every 6 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard9 real differences · 2 level
ChordProg Ear Trainer versus Oolimo Guitar Chords: the parameters behind the verdict, then further details
ParameterChordProg Ear TrainerOolimo Guitar Chords
PriceFree — better$5.99
Rating4.4 (16 ratings)4.8 (105 ratings) — better
Positive reviews75.0% of reviews91.6% of reviews — better
Number of ratings16105 — better
Update frequencyEvery 5 days — betterEvery 6 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank—#40 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better16
Further details — not scored
Size116 MB15 MB
Age rating4+9+
DeveloperDevDa ASOliver Mochmann

Customer experience

ChordProg Ear Trainer

All ratings16 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews16 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

Oolimo Guitar Chords

All ratings102 ratings
Positive95.1%
Neutral2.9%
Negative2.0%
Written reviews119 reviews
Positive91.6%
Neutral7.6%
Negative0.8%

In-app purchases

2 purchases

ChordProg Ear Trainer

Subscriptions2
  • Monthly premium subscription!$2.991 Month
  • Yearly Premium Subscription!3 Days trial$24.991 Year
None

Oolimo Guitar Chords

No in-app purchases

Questions

Is ChordProg Ear Trainer free?
ChordProg Ear Trainer is free to download, with in-app purchases available.
Is Oolimo Guitar Chords free?
Oolimo Guitar Chords costs $5.99, with no in-app purchases.
Which has better reviews, ChordProg Ear Trainer or Oolimo Guitar Chords?
Oolimo Guitar Chords is rated higher. ChordProg Ear Trainer averages 4.4 out of 5 from 16 ratings, while Oolimo Guitar Chords averages 4.8 from 105 ratings.
Do ChordProg Ear Trainer or Oolimo Guitar Chords have ads?
Neither ChordProg Ear Trainer nor Oolimo Guitar Chords shows ads.
Which is updated more often, ChordProg Ear Trainer or Oolimo Guitar Chords?
ChordProg Ear Trainer ships an update every 5 days, and Oolimo Guitar Chords every 6 weeks. Most recently, ChordProg Ear Trainer was updated on November 2, 2026 and Oolimo Guitar Chords on November 3, 2026.

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