Comparison

Quinterval vs All Chords

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

Head to head
About

Quinterval

Explore the circle of fifths with interactive scale displays. Select keys via touch or slider to view major and parallel minor scales. Customize note notation and clef for a personalized musical experience.

Highlights
  • Interactive circle of fifths
  • Major and parallel minor scale display
  • Adjustable display range
  • Customizable note notation (German, English, Italian)
  • Clef selection (G, C, F)
  • Key signature display
Features
Read full description

Quinterval is an interactive circle of fifths including the display of the corresponding scales. A key in the circle can be selected either by touching the tonic or by turning the slider in the middle. The circle displays both the respective major and parallel minor scales. The display ranges from F-flat major (D-flat minor) to G-sharp major (E-sharp minor). A second slider can be used to move the visible circle section accordingly. The note names can be set between german, english or italian notation. The lower area shows the related major scale with its key signature. The first step and the sixth step with the corresponding minor scale are highlighted. The notes can be displayed with G-Clef, C-Clef or F-Clef. The accidentals can also be displayed before the individual notes. Additional functionality is available as an InApp purchase: - Display the notes of the parallel minor scale - Display triads with their chord names - Playback notes by tapping on them

About

All Chords

Explore a comprehensive library of chords, scales, and arpeggios across various genres and keys. Identify musical positions and fingerings for guitar and piano with a built-in analyzer. Offers a free demo with an optional annual subscription for full access.

Highlights
  • Extensive chord and arpeggio library
  • 66 modern and 61 world music scales
  • Chord and scale identification tool
  • Guitar and piano fingerings
  • Color-coded tone functions
  • Ear and vocal training player
Read full description

The complete and ultimate library! Find, browse, learn, compare and analyze chords, scales, voicings and arpeggios from numerous genres in all keys, as well as an identification-tool for simple and complex positions or fingerings. Display for guitar and piano as well as a matrix. Free Demo in key „C“. Completely ad-free. No tracking. In app purchase for full access - subscription 1.- $ per year. Chords • 59 chords and arpeggios (Major, Minor, Dominant 7, Major 7, Sus 2, Sus 4, Diminished, Augmented, Minor 7, Minor 6, 7/9/#11/b13, Power Chords, etc. … • In all guitar positions • Narrow and wide piano fingerings (voicings) • Up to 15 voicings per chord and key • Color-code tones by function or interval (root / third / fifth / seventh / tension) • Select guitar-to-piano (or vice-versa) Scales • 66 scales of modern music and jazz (modern modes, melodic minor modes, harmonic minor modes, harmonic major modes, jazz, blues, bebop, pentatonic scales ...) • 61 world-music scales (Arabic, Chinese, Japanese, Jewish, Indian, Roman, ...) • In all guitar positions • Select guitar-to-piano (or vice-versa) Analyzer • Determine chords and scales after entering at least 2 notes on either the guitar or piano
 • Display multiple results • Identification of excerpts from chords and scales • Useful and informative ranking of bass tone, number of tones, and complexity • Direct transfer of the analysis results to normal display mode
 Additional • Left-handed guitar • Change between # and b keys • Display of enharmonic equivalents • Classical notation in the treble clef • 8 basic chords and 6 standard scales for beginners • Systematic display of chords and scales in a matrix
• Intervals at a glance • Comparison of harmonic structure • Adjustable Player for both ear and vocal training • show/hide note names and colored intervals Terms of Use: https://www.allchords-allscales.com/en/general-terms-of-use/ Privacy Policy: https://www.allchords-allscales.com/privacy-policy-app/ ‎

Screenshots

Quinterval3 screens
All Chords4 screens

Verdict

The call

The clearest difference is update cadence: All Chords at every 3 months against Quinterval's every 8 months. Quinterval's advantage is ratings volume (21 vs 6). On price, rating, review sentiment and ads 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. Quinterval sells 1 one-off in-app purchase and All Chords sells 6 in-app purchases, starting at $0.99 per year. 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 — 4.4 for Quinterval against 4.3 for All Chords. Both are backed by a comparable volume of ratings — 21 and 6 respectively. Written reviews are what separate them: 78% of Quinterval's written reviews are positive against 75% of All Chords's.

UpkeepUpdate frequency

Quinterval ships an update every 8 months, All Chords every 3 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

Scorecard2 real differences · 8 level
Quinterval versus All Chords: the parameters behind the verdict, then further details
ParameterQuintervalAll Chords
PriceFreeFree
Rating4.4 (21 ratings) — better4.3 (6 ratings)
Positive reviews78.2% of reviews — better75.0% of reviews
Number of ratings21 — better6
Update frequencyEvery 8 monthsEvery 3 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS15.615.1 — better
Further details — not scored
Size43 MB29 MB
Age rating4+4+
DeveloperOliver HahnMichael Schallmayer

Customer experience

Quinterval

All ratings21 ratings
Positive85.7%
Neutral4.8%
Negative9.5%
Written reviews87 reviews
Positive78.2%
Neutral11.5%
Negative10.3%

All Chords

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

Bugs and requests

Quinterval

Reported bugs

6 issues
  • Stummmodus prevents sound playback
  • Errors in scales with sharps
  • App crashes on startup (iOS 5.5.1)
  • App closes immediately after opening since last update
  • Gb/F# enharmonic bug
Show 1 more
  • App not working after update (gray box, installing loop)

Requested features

23 requests
  • Include traditional Roman Numerals to degree scale
  • Add C flat Maj with 7 flats
  • Add C sharp Maj with 7 sharps
  • Option for both accidentals
  • Multiple octave scales
Show 18 more
  • Arpeggios feature
  • Change fingering numbers for other instruments
  • Audio output from the wheel/scales
  • Compositional aid features
  • Nashville number system option
  • Sound generator/polyphonic keyboard
  • Support for tenor clef
  • In-app instructions & explanations
  • Display natural minor scale when Moll-Parallele is clicked
  • American notation option (Bb)
  • Church modes with audio support
  • Support for iOS 7
  • Alto clef support
  • Add missing flats
  • Parallel minor key in circle
  • Simple transposition table app
  • Add C# and Cb
  • iPad version

All Chords

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Quinterval

One-time1
  • Enhanced Version$0.99
6 purchases

All Chords

Subscriptions6
  • Annual subscription$0.991 Year
  • No Budget Subscription$0.991 Year
  • Support - Annual Subscription$3.991 Year
Show 3 more
  • Low Budget Subscription$3.991 Year
  • Standard Subscription$12.991 Year
  • Support Subscription$59.991 Year

Questions

Is Quinterval free?
Quinterval is free to download, with in-app purchases available.
Is All Chords free?
All Chords is free to download, with in-app purchases available.
Which has better reviews, Quinterval or All Chords?
Quinterval is rated higher. Quinterval averages 4.4 out of 5 from 21 ratings, while All Chords averages 4.3 from 6 ratings.
Do Quinterval or All Chords have ads?
Neither Quinterval nor All Chords shows ads.
Which is updated more often, Quinterval or All Chords?
Quinterval ships an update every 8 months, and All Chords every 3 months. Most recently, Quinterval was updated on November 6, 2026 and All Chords on November 3, 2026.

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