Comparison

Complete Ear Trainer vs Solo

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

Head to head
About

Complete Ear Trainer

Develop your musical ear and music theory knowledge with this comprehensive training app. It offers progressive drills, various sound options, and a gamified learning experience to improve improvisation, composition, and performance skills.

Highlights
  • 150+ progressive drills
  • 11 drill types
  • 24 intervals, 36 chord types
  • Melodic dictations and chord progressions
  • Gamified learning with star system
  • Custom drill and program creation
  • Cloud sync across devices
Features
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The ultimate ear training app for musicians. Develop your relative pitch to the full by improving your aural skills and your music theory knowledge. This will better many aspects of your life as a musician, be it regarding improvisation, composition, arrangement, interpretation, singing, or playing in a band. Designed like a video game and with strong pedagogical concepts in mind, this app will make you truly master each interval, chord, scale, etc. before taking you to the next one. Features • 150+ progressive drills arranged over 4 levels / 28 chapters • 11 drill types, 24 intervals, 36 chord types, chord inversions, 28 scale types, melodic dictations, chord progressions • Easy mode: 50+ progressive drills arranged over 12 chapters especially designed for beginners • Play a selection of 21 drills in arcade mode • 5 octaves of actual recorded grand piano sounds • 7 additional sound banks are available, all with actual recorded sounds: vintage piano, Rhodes piano, electric guitar, harpsichord, concert harp, strings and pizzicato strings • In each chapter, a theory card will introduce you to the concepts you will need to know • No need to know how to read music on a staff • Designed like a video game: earn 3 stars in each drill of a chapter to unlock the next one. Or will you be able to obtain perfect 5-star scores? • Don't want to follow the preestablished path of progression? Create and save your own custom drills and rehearse them at your own convenience • Create full custom training programs and invite friends or students to join them. If for example you're a teacher you can create custom programs for your students, add drills every week and view their scores on private leaderboards • Never lose any progress: cloud sync across your various devices • 25 achievements to unlock • Worldwide leaderboards (global, per level, per chapter, easy mode, arcade mode) • Nice and clean user interface with 2 display themes: light and dark • Designed by a musician and music teacher with a Royal Conservatory master's degree Full Version • Download the app and try out the first chapter of each mode for free • One-time in-app purchase to unlock the full version on all your devices Having a problem? Got a suggestion? You can reach us at hello@completeeartrainer.com Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Solo

Master your guitar fretboard with this interactive trainer. Learn note names, intervals, chord changes, and scales through guided exercises. Designed by professional guitarists, it offers customizable workouts for all skill levels.

Highlights
  • Fretboard visualization
  • Note name trainer
  • Interval shape memorization
  • Chord change outlining
  • Scale practice
  • Interactive fretboards
  • Customizable workouts
Features
Currently charting
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Solo is the ultimate practice App for mastering fretboard visualization, designed by world renowned guitarists Tom Quayle and David Beebee. Four powerful fretboard trainers allow you to work intuitively on each aspect of the visualization process; learning note names, memorising interval shapes, outlining chord changes, and practicing scales. Solo asks you to find intervallic functions against one root note, chord symbol or scale at a time, listens to the notes you play, and doesn’t move on until you’ve correctly found each note by its intervallic function in the specified order. Practice with Solo and finally learn your note names, master interval shapes, confidently play through chord changes and break out of scale boxes with intervallic functions. Start transforming your playing and confidence on the fretboard today! NOTE TRAINER The Note Trainer is perfect for beginner and intermediate players getting to grips with note names on the neck - the foundation of solid fretboard knowledge. ‣ Solo shows you random root notes to find and listens, waiting for you to get it correct. ‣ Slide on the interactive fretboards for helpful diagrams and to study alternative options. Choose from 6 string guitar (standard and 4ths tuning), 7 string guitar, 4 string bass & 5 string bass. ‣ Optional practice suggestions offer challenging ways to limit and test yourself. ‣ Duration based workouts allow you to craft the perfect practice session. INTERVAL TRAINER The Interval Trainer will help players at all levels work on interval shapes with intervallic functions - the key to unlocking true freedom on the fretboard. ‣ Choose any combination of intervallic functions to practice. ‣ Create custom interval groups or choose the intervals for ANY chord type or scale. ‣ The Interval Trainer will randomise your chosen intervals and ask you to find them against either a fixed or random root note. ‣ Slide on the interactive fretboards for helpful diagrams, showing you where all of the interval shapes are across the neck, and to study alternative options. Choose from 6 string guitar (standard and 4ths tuning), 7 string guitar, 4 string bass & 5 string bass. ‣ Duration based workouts allow you to craft the perfect practice session. CHANGES TRAINER In the Changes Trainer you find intervallic functions, using single notes to outline different chord types or sets of chord changes, a key skill for learning to improvise through chord changes. ‣ Practice outlining intervallic functions through over 100 common chord progressions and single chord exercises. ‣ 50 intervallic function levels. Go from simple chord tones to complex melodic structures and scales. ‣ Solo intelligently maps out the correct intervals over each chord and listens for you to play each intervallic function in the specified order. ‣ Powerful workout options provide almost limitless ways to challenge yourself. ‣ Transpose the key of any progression or exercise. ‣ Choose to randomly transpose the progression (or single chord exercise) each time it repeats. ‣ Work on voice leading chord tones through single note lines. SCALE TRAINER The Scale Trainer contains a vast array of scales and powerful workout options, allowing you to finally break out of the box and develop a much deeper understanding of how scales are constructed on the fretboard. ‣ Practice finding scales on the fretboard using intervallic functions. ‣ Over 50+ Scales and modes. ‣ Powerful workout options provide almost limitless ways to challenge yourself. ‣ Melodic sequence options let you focus on starting from any chord tone within the scale. ‣ Duration based workouts allow you to craft the perfect practice session.

Screenshots

Complete Ear Trainer4 screens
Solo4 screens

Verdict

The call

The clearest difference is price: Complete Ear Trainer at Free against Solo's $17.99. Complete Ear Trainer also leads on update cadence (fortnightly vs monthly). Solo's advantage is chart position (#88 vs unranked) and ratings volume (655 vs 200). On rating, review sentiment, ads and in-app purchases 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

Complete Ear Trainer is free to download; Solo costs $17.99 up front. Complete Ear Trainer sells 3 in-app purchases, starting at $0.99 per month and Solo sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Complete Ear Trainer against 4.7 for Solo. Both are backed by a comparable volume of ratings — 200 and 655 respectively. Written reviews are what separate them: 85% of Complete Ear Trainer's written reviews are positive against 83% of Solo's.

UpkeepUpdate frequency

Complete Ear Trainer ships an update fortnightly, Solo monthly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 7 level
Complete Ear Trainer versus Solo: the parameters behind the verdict, then further details
ParameterComplete Ear TrainerSolo
PriceFree — better$17.99
Rating4.7 (200 ratings)4.7 (655 ratings) — better
Positive reviews85.1% of reviews — better83.3% of reviews
Number of ratings200655 — better
Update frequencyFortnightly — betterMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank—#88 — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.516.0 — better
Further details — not scored
Size78 MB231 MB
Age rating4+4+
DeveloperBinary GuiltTrio Software Ltd

Customer experience

Complete Ear Trainer

All ratings199 ratings
Positive93.5%
Neutral2.0%
Negative4.5%
Written reviews174 reviews
Positive85.1%
Neutral7.5%
Negative7.5%

Solo

All ratings644 ratings
Positive93.9%
Neutral1.1%
Negative5.0%
Written reviews233 reviews
Positive83.3%
Neutral5.2%
Negative11.6%

Bugs and requests

Complete Ear Trainer

Not enough reviews yet to summarise bugs or requests.

Solo

Reported bugs

3 issues
  • Crashes when launching the app
  • Inconsistent note detection
  • Inability to save progress or settings

Requested features

8 requests
  • Add ability to create custom chord progressions
  • Integrate metronome functionality
  • Provide visual representation of intervals on staff
  • Add option to practice natural notes only
  • Implement option to hear chord tones in the background
Show 3 more
  • Allow randomization of scale order
  • Add support for non-standard tunings
  • Implement sound feedback when finding the correct note

In-app purchases

3 purchases

Complete Ear Trainer

Subscriptions2
  • Cloud Sync and Web access$0.991 Month
  • Cloud Sync and Web access$9.991 Year
One-time1
  • Full Version$6.99
2 purchases

Solo

One-time2
  • Custom Tunings$1.99
  • Custom Chord Progressions$5.99

Questions

Is Complete Ear Trainer free?
Complete Ear Trainer is free to download, with in-app purchases available.
Is Solo free?
Solo costs $17.99, and also offers in-app purchases.
Which has better reviews, Complete Ear Trainer or Solo?
Solo is rated higher. Complete Ear Trainer averages 4.7 out of 5 from 200 ratings, while Solo averages 4.7 from 655 ratings.
Do Complete Ear Trainer or Solo have ads?
Neither Complete Ear Trainer nor Solo shows ads.
Which is updated more often, Complete Ear Trainer or Solo?
Complete Ear Trainer ships an update fortnightly, and Solo monthly. Most recently, Complete Ear Trainer was updated on October 24, 2026 and Solo on October 25, 2026.

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