Comparison

Interval 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

Interval Ear Trainer

Improve your musical ear by learning to identify the distance between two notes. Practice both harmonic (played together) and melodic (played sequentially) intervals. Gradually progress through difficulty levels with piano or guitar input options.

Highlights
  • Melodic interval training
  • Harmonic interval training
  • Gradual difficulty progression
  • Piano or guitar input
  • Select specific intervals to practice
Features
Read full description

Every musician should work on Ear Training (or Aural Training) and Interval Ear Training is a very important element of ear training. To put it very simply, you will learn to recognise the relationship between two notes (by distance), when they are played together or apart! There are two types of interval listening, harmonic and melodic. In harmonic intervals the notes are played at the same time and in melodic the notes are played one after the other. Easy to remember: Melodic Intervals make melody, Harmonic Intervals make harmony! Many of you will probably want to understand how the names are found and how to work out the interval note names in every key. For this info you probably want to check out my ebook Practical Music Theory (available from justinguitar.com) which will explain all the theory related to this. This app deals specifically with Interval Ear Training, both melodic and harmonic. It will start very easy and gradually get harder as you get more correct and can pass each stage. You can choose from Piano or Guitar Input for your answers, and you can chose to hear the notes and guitar or piano. Personally, I'd recommend getting used to both. In "Training Mode" you can select specific intervals to work on if you are struggling with just specific intervals or types of interval. I'm sure you'll find this app very helpful, all you need to add is practice time! Best wishes, Justin

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
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

Interval Ear Trainer4 screens
Oolimo Guitar Chords4 screens

Verdict

The call

The clearest difference is rating: Oolimo Guitar Chords at 4.8 against Interval Ear Trainer's 3.9. Oolimo Guitar Chords also leads on update cadence (every 6 weeks vs every 13 months) and review sentiment (92% vs 67%). Interval Ear Trainer's advantage is price ($1.99 vs $5.99) and iOS requirement (10.3 vs 16). On ratings volume, ads, in-app purchases and monetization model 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

Interval Ear Trainer costs $1.99 and Oolimo Guitar Chords $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Oolimo Guitar Chords holds the better App Store score, 4.8 against 3.9. Both are backed by a comparable volume of ratings — 44 and 102 respectively. Written reviews point the same way: 67% of Interval Ear Trainer's written reviews are positive against 92% of Oolimo Guitar Chords's.

UpkeepUpdate frequency

Interval Ear Trainer ships an update every 13 months, Oolimo Guitar Chords every 6 weeks. The most recent releases landed on October 17, 2026 and October 18, 2026 respectively.

Scorecard5 real differences · 5 level
Interval Ear Trainer versus Oolimo Guitar Chords: the parameters behind the verdict, then further details
ParameterInterval Ear TrainerOolimo Guitar Chords
Price$1.99 — better$5.99
Rating3.9 (44 ratings)4.8 (102 ratings) — better
Positive reviews66.7% of reviews91.6% of reviews — better
Number of ratings44102 — better
Update frequencyEvery 13 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.3 — better16
Further details — not scored
Size72 MB15 MB
Age rating4+9+
DeveloperJustin GuitarOliver Mochmann

Customer experience

Interval Ear Trainer

All ratings44 ratings
Positive70.5%
Neutral11.4%
Negative18.2%
Written reviews57 reviews
Positive66.7%
Neutral8.8%
Negative24.6%

Oolimo Guitar Chords

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

Bugs and requests

Interval Ear Trainer

Reported bugs

6 issues
  • Does not respond to touch input
  • Not working on iOS 11
  • Cannot ster back after mistake
  • Piano input is wrong
  • Melodic interval comes out mistimed
Show 1 more
  • App crashes or freezes (implied by 'not working')

Requested features

14 requests
  • Option to replay missed intervals
  • Option to keep root note the same
  • Automatic mode for interval playback
  • Adjustable delay for answer reveal
  • Configurable time between interval plays
Show 9 more
  • Add solmization syllables (Do Re Mi)
  • Allow turning off game interface
  • Specify pitch range in training mode
  • Specify a single root note
  • Add landscape rotation
  • Allow going back to adjust level
  • Improve harmonic interval sound quality
  • Add tempo change for melodic intervals
  • Update for iOS 11

Oolimo Guitar Chords

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Interval Ear Trainer

No in-app purchases

None

Oolimo Guitar Chords

No in-app purchases

Questions

Is Interval Ear Trainer free?
Interval Ear Trainer costs $1.99, with no in-app purchases.
Is Oolimo Guitar Chords free?
Oolimo Guitar Chords costs $5.99, with no in-app purchases.
Which has better reviews, Interval Ear Trainer or Oolimo Guitar Chords?
Oolimo Guitar Chords is rated higher. Interval Ear Trainer averages 3.9 out of 5 from 44 ratings, while Oolimo Guitar Chords averages 4.8 from 102 ratings.
Do Interval Ear Trainer or Oolimo Guitar Chords have ads?
Neither Interval Ear Trainer nor Oolimo Guitar Chords shows ads.
Which is updated more often, Interval Ear Trainer or Oolimo Guitar Chords?
Interval Ear Trainer ships an update every 13 months, and Oolimo Guitar Chords every 6 weeks. Most recently, Interval Ear Trainer was updated on October 17, 2026 and Oolimo Guitar Chords on October 18, 2026.

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