Comparison

ChordLab vs ScaleMate

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

Head to head
About

ChordLab

Explore modern four-part voice leading and chord permutations. This tool helps intermediate musicians discover new chord voicings and understand harmonic structures. Features include a Circle of Fifths, chord finder, and virtual instruments.

Highlights
  • Four-part voice leading calculator
  • Chord finder for triads and seventh chords
  • Interactive Circle of Fifths
  • Virtual piano and guitar instruments
  • All inversions and standard voicings
  • Apple Watch app for chord spelling
Features
Read full description

ChordLab is a specialist tool and calculator of sorts for modern four-part voice leading. Everyone has heard these colors in the arrangements of Big Bands - the horn riffs in the Jetsons carton song for example. With ChordLab we can in a way flip through all possible permutations of these chords. More theoretical background is available in the documentation. This is not a general chord app for beginning instrumentalists. To the intermediate player, however, ChordLab can be a source of great inspiration and introduction to many new color choices. Four-part harmony may feel restrictive on instruments capable of more than 4 voices, but for a small choir for example it is a basic fact of life. It has become a staple in modern music as well as it allows the accompanist to declutter the spectrum in a sense by playing fewer notes. Root and fifth substitutions are applied automatically when dialing up a chord in ChordLab. Simply like that. Once the quality of a chord has been set it can then be viewed and listened to in all standard and not so standard drop voicings and moved through its inversions. This is of particular importance to guitar players as quite a few voicings are impossible to play and one may be left with rather few options. Chord spelling is also the main feature of ChordLab's Apple Watch app. ChordLab has an interactive Circle of Fifths. With it we can look up key signatures for major and minor scales as well as all other modes derived of the major scale. So it is possible for example to display key signatures for all mixolydian scales and simultaneously highlight the other degrees for that mode. Additionally ChordLab displays degree structures for a key in standard Roman numerals. This is extremely useful when putting together chord progressions. Roots of the current harmonic domain are highlighted in white and can be tapped to audit the associated chords. The chord finder feature in ChordLab allows you to search its database for 3 or 4 note structures to determine their harmonic quality. To find a chord in its database ChordLab uses the enharmonically simplest solution and does not require you do know whether a note is called G# or an Ab. This is especially useful for guitarists that seldomly encounter chords in root position due to the tuning of the instrument. Features include: • Chord spelling for all common chords • Notation and textual representation of chord tones • Chord finder for triads and seventh chords • Alto, bass, tenor, treble clefs, TAB and grand staff • All inversions and standard voicings • Virtual piano and guitar instruments • Chord tone labeling in instrument views • All common open and alternate tunings presets (guitar) • Automatic root and fifth substitution • Apple Watch app There is a lot of functionality built into ChordLab, but as with any tool it is what we make of it. If chord spelling is a term in your vocabulary ChordLab should be of interest. Or maybe you want to grow your chord reportoire. Putting music theory into words often makes it sound overly complex yet nobody would say that orange or purple are complicated. ChordLab lets you play and work with colors in a sense and shows you how to play them on your instrument. It is very a unique tool for musicians, song-writers, professionals and music students and one that you will find yourself coming back to again and again.

About

ScaleMate

This app provides an interactive reference for understanding music scales and jazz harmony. It allows users to hear, visualize, and manipulate scales to deepen their comprehension of musical concepts. Features include expert write-ups, practical usage tips, and animated transformations between scales.

Highlights
  • Hear scales as melodies
  • Visualize scales on circle of fifths
  • Expert scale write-ups
  • Manipulate scales and hear changes
  • Full library of scales
  • Automatic scale recognition
  • Animated scale transformations
Features
Read full description

ScaleMate is a modern, interactive reference to jazz harmony. ScaleMate lets you… HEAR SCALES conventionally or as random melodies. VISUALIZE SCALES in ways that help you understand them deeper. READ & LEARN through built-in, expert scale write-ups & use tips. MANIPULATE SCALES while you listen. Hear the effects instantly to understand how scales differ. ————————————————— ScaleMate is a reference that shows you & plays for you any scale you wish…. But that's just the beginning. ScaleMate helps you hear & understand scales and harmony more deeply… by teaching you to visualize scales in ways that match what they sound like. Imagine… Wouldn't it be nice to have a single image to understand all the modes of the major scale? Ever wonder why the modes are ordered so oddly, hopping between major & minor & dominant? Or notice that the Altered Scale is the "darkest", most minor sounding of all possible dominant scales? Or that its tritone-substitution, the Lydian Dominant Scale, is the "brightest" of them all? Ever notice that the minor pentatonic scale is a mode of the major pentatonic scale and wonder whether there were any other useful pentatonic modes? Ever notice that the major pentatonic scale (and its modes) are the only 5-note scale that doesn't contain any half steps or tritones? ScaleMate shows you scales in a way that makes these observations natural and immediate… and plays you the results too. Or ever just wonder what the definition of a dominant chord is and which common scales can be used for them? ScaleMate's got you covered. ——————— FEATURES ——————— USE IT RIGHT AWAY Use ScaleMate right now! Built-in help is there for you whenever you want it. LISTEN ScaleMate lets you hear what scales sound like, by playing them up & down, or by playing random melodies that use them. VISUALIZE WHAT YOU HEAR ScaleMate shows every scale both linearly (for melodic understanding) and on the circle of fifths (for harmonic understanding). FULL LIBRARY OF SCALES ScaleMate knows all the scales you're ever likely to encounter. A WELLSPRING OF KNOWLEDGE Extensive info pages on 60+ of the most common & important scales, including practical advice and usage tips. (Over 15,000 words of content.) USE IT TO TEACH ScaleMate is perfect for projecting on a screen or sharing over zoom while you teach. Its animations let you show how one scale transforms into another, and it has special features (pointing, hiding/revealing) for educators. AUTOMATIC SCALE RECOGNITION Build your own scales and ask yourself "what if I make this change…" Whenever you produce a conventional scale, ScaleMate will automatically identify it for you by name and tell you about it. ANIMATED IN FRONT OF YOUR EYES Change between one scale and another and see the differences between them, visually animated before you. SMART SPELLING ScaleMate notates perfectly, for every scale in every key. NOTE ROLES Next to each note, ScaleMate displays its function—in numbers (3, 5, b7) or in solfege (Mi, Sol, Te) or not at all, according to your preference. SIMPLE OR ADVANCED NOTATION ScaleMate shows you double flats and double sharps whenever they're called for… unless you'd rather see simpler note names. Prefer never to see notes like Cb and E#? You can have ScaleMate show them as B and F. DIMINISHED HARMONY Choose the option to color the notes in three colors so you can see which diminished seventh chord every note belongs to. Great for understanding diminished scales & chords and seeing how they relate to other scales too. JAZZ CRED ScaleMate is created by Anton Schwartz. An award-winning saxophonist & composer as well as an expert educator, he is also the creator of the highly rated RANDOM ROOTS app. Terms and conditions: https://scalemate.app/terms-conditions Privacy policy: https://scalemate.app/privacy

Screenshots

ChordLab4 screens
ScaleMate4 screens

Verdict

The call

The clearest difference is review sentiment: ScaleMate at 100% against ChordLab's 22%. ScaleMate also leads on in-app purchases (none vs 10) and update cadence (fortnightly vs every 3 months). ChordLab's advantage is rating (5.0 vs 4.8) and device support (4 vs 2). On price, ads 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

ChordLab costs $3.99 and ScaleMate $3.99 up front. ChordLab sells 10 one-off in-app purchases. ScaleMate asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ChordLab holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: ScaleMate has 24 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 22% of ChordLab's written reviews are positive against 100% of ScaleMate's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

ChordLab ships an update every 3 months, ScaleMate fortnightly. The most recent releases landed on September 25, 2026 and October 18, 2026 respectively.

Scorecard7 real differences · 3 level
ChordLab versus ScaleMate: the parameters behind the verdict, then further details
ParameterChordLabScaleMate
Price$3.99$3.99
Rating5.0 (1 ratings) — better4.8 (24 ratings)
Positive reviews21.7% of reviews100.0% of reviews — better
Number of ratings124 — better
Update frequencyEvery 3 monthsFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidPaid
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad
Requires iOS12.1 — better17.5
Further details — not scored
Size40 MB36 MB
Age rating4+4+
DeveloperRoGame SoftwareAnton Schwartz

Customer experience

ChordLab

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews23 reviews
Positive21.7%
Neutral17.4%
Negative60.9%

ScaleMate

All ratings24 ratings
Positive91.7%
Neutral8.3%
Negative0.0%
Written reviews9 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

10 purchases

ChordLab

One-time10
  • 01 Keyboard Pack$0.99
  • 02 Guitar Pack$0.99
  • 03 Bass Pack$0.99
Show 7 more
  • 04 Strings Pack$0.99
  • 05 Mallets Pack$0.99
  • 06 Winds Pack$0.99
  • 07 Synths Pack$0.99
  • 08 Folk Pack$0.99
  • 09 Winds Pack 2$0.99
  • 10 Folk Strings Pack$0.99
None

ScaleMate

No in-app purchases

Questions

Is ChordLab free?
ChordLab costs $3.99, and also offers in-app purchases.
Is ScaleMate free?
ScaleMate costs $3.99, with no in-app purchases.
Which has better reviews, ChordLab or ScaleMate?
ChordLab is rated higher. ChordLab averages 5.0 out of 5 from 1 ratings, while ScaleMate averages 4.8 from 24 ratings.
Do ChordLab or ScaleMate have ads?
Neither ChordLab nor ScaleMate shows ads.
Which is updated more often, ChordLab or ScaleMate?
ChordLab ships an update every 3 months, and ScaleMate fortnightly. Most recently, ChordLab was updated on September 25, 2026 and ScaleMate on October 18, 2026.

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