Comparison

Chet vs metromills

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

Head to head
About

Chet

Develop your musical ear and understanding of music theory with interactive exercises and games. Learn at your own pace, practice with virtual instruments, and track your progress. Compete globally and become a more versatile musician.

Highlights
  • Identify music theory concepts
  • Call and response exercises
  • MIDI keyboard compatibility
  • Guided learning paths
  • Extensive exercise library
  • Competitive global leaderboards
  • Spaced repetition practice mode
Features
Read full description

Chet is a music education app with a focus on ear training and music theory. Learn at your own pace, play musical games, and compete against others from around the world! Using Chet helps you to become a more well-rounded, versatile musician. With a trained ear, you can learn songs more quickly, play with others more easily and feel confident in your overall musical abilities! Features: - Multiple choice questions that challenge you to identify music theory concepts. - Call and response questions using a virtual piano, guitar, or bass. - MIDI compatible... so plug in your MIDI keyboard if you have one! - Guided learning paths for beginner and intermediate users. - A library of exercises including intervals, scales, arpeggios, chords, progressions, tonal sequences, famous tunes, and atonal sequences. - Challenge games with competitive global leaderboards. - Professionally recorded music performed by world-class musicians. - A variety of musical genres including jazz, classical, pop and more. - A practice mode that uses spaced repetition. - Sign in to track your progress and compete with other musicians. - Never run out of ways to keep learning with regular updates and new content.

About

metromills

Features
Read full description

METROMILLS Metromills révolutionne le travail technique instrumental avec une approche unique : au lieu de maintenir un tempo fixe et d'accélérer à chaque changement rythmique, vous travaillez à durée constante par note. LE PROBLÈME QUE NOUS RÉSOLVONS Quand vous travaillez vos gammes en passant de 3 à 4 notes par temps au même tempo, vous devez gérer deux difficultés simultanément : Le changement d'organisation rythmique L'accélération progressive (chaque note devient plus rapide) Cette double contrainte limite votre attention pour ce qui compte vraiment : la précision du geste, l'équilibre sonore, la qualité du toucher. NOTRE SOLUTION Avec Metromills, vous fixez la durée de chaque note en millisecondes, et l'app ajuste automatiquement le tempo quand vous changez le multiplicateur. Résultat : vous isolez parfaitement la variable rythmique sans accélérer involontairement. FONCTIONNALITÉS Mode Millisecondes : Travaillez par durée constante (70-500ms) Mode BPM : Basculez en tempo traditionnel quand nécessaire Tap Tempo : Capturez votre tempo naturel en quelques taps Programmation : Créez des séquences avec changements automatiques de multiplicateurs (metric modulation) 4 sons de métronome : Classique, Tick, Cowbell, Bip Interface intuitive : Pas de menus complexes, juste l'essentiel POUR QUI ? Pianistes, guitaristes, violonistes, contrebassistes Instrumentistes à vent (flûte, clarinette, saxophone) Percussionnistes Professeurs de musique cherchant de nouveaux outils pédagogiques Musiciens de tous niveaux visant la régularité et la vélocité PÉDAGOGIE Progressez par paliers de 5ms avec une précision scientifique. Mémorisez "150ms par note" plutôt que "sextolets à 60 BPM" – c'est plus significatif et reproductible.

Screenshots

Chet4 screens
metromills3 screens

Verdict

The call

The clearest difference is in-app purchases: Chet at none against metromills's 3. metromills's advantage is update cadence (every 2 weeks vs every 5 weeks) and iOS requirement (16.2 vs 18.0). On price, 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

Both are free to download. metromills sells 3 one-off in-app purchases. Chet asks for nothing beyond the download.

UpkeepUpdate frequency

Chet ships an update every 5 weeks, metromills every 2 weeks. The most recent releases landed on November 10, 2026 and November 9, 2026 respectively.

Scorecard3 real differences · 7 level
Chet versus metromills: the parameters behind the verdict, then further details
ParameterChetmetromills
PriceFreeFree
Rating4.8 (2.4K ratings) — better—
Positive reviews96.1% of reviews—
Number of ratings2.4K — better—
Update frequencyEvery 5 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.016.2 — better
Further details — not scored
Size116 MB24 MB
Age rating4+9+
DeveloperEnsemble EducationPascal Versini

Bugs and requests

Chet

Reported bugs

3 issues
  • App not loading or freezing
  • Incorrect labeling of intervals
  • Timed exercises not functioning properly

Requested features

7 requests
  • Add Chinese language support
  • Incorporate guitar-specific exercises
  • Introduce a hands-free mode
  • Reinstate the previous practice mode
  • Expand the range of musical genres and styles
Show 2 more
  • Add an option to change the tonic note
  • Introduce a daily streak feature

metromills

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Chet

No in-app purchases

3 purchases

metromills

One-time3
  • virtual coffe$1.99
  • Virtual Pizza$4.99
  • Virtual keyboard$9.99

Questions

Is Chet free?
Chet is free to download, with no in-app purchases.
Is metromills free?
metromills is free to download, with in-app purchases available.
Do Chet or metromills have ads?
Neither Chet nor metromills shows ads.
Which is updated more often, Chet or metromills?
Chet ships an update every 5 weeks, and metromills every 2 weeks. Most recently, Chet was updated on November 10, 2026 and metromills on November 9, 2026.

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