Comparison

Alto vs ChordMapMidi

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

Head to head
About

Alto

A comprehensive guide to musical instruments, detailing their registers, transpositions, playability, and sound characteristics. Explore dozens of instruments by family, alphabetically, or by score order, with highlighted registers and simple transposition features.

Highlights
  • Instrument registers and transpositions
  • Playability and sound characteristics
  • Explore by family, alphabet, or score
  • Registers highlighted by difficulty/timbre
  • Simple transposition feature
  • Includes woodwinds, brass, strings, percussion, vocals, and more
Features
Read full description

This is the ultimate instruments guide for musicians, composers, songwriters, conductors, students and educators. It includes the registers, transpositions, playability, and sound characteristics of dozens of instruments. With this app, you can: - Explore by family, alphabetically, or by score order - See registers highlighted by difficulty and timbre - Transpose with a simple tap - See open strings, vocal ranges, timpani tunings for different sizes of drums, and more. In this version: - Woodwinds: Piccolo, Flute, Alto Flute, Oboe, English Horn, Eb Clarinet, Bb Clarinet, A Clarinet, Bass Clarinet, Soprano Saxophone, Alto Saxophone, Tenor Saxophone, Baritone Saxophone, Chromatic Harmonica, Diatonic Harmonica, Ocarina, Bassoon, Contrabassoon - Brass: French Horn, Piccolo Trumpet, Trumpet in D, Trumpet in C, Trumpet in Bb, Trombone, Bass Trombone, Tuba - Strings: Violin, Viola, Cello, Double Bass - Keyboard and Percussion: Piano, Celesta, Glockenspiel, Marimba, Vibraphone, Fender Rhodes, Xylophone, Timpani - Choral: Soprano, Alto, Tenor, Bass - Operatic: Soprano, Mezzo-soprano, Tenor, Baritone, Bass - Harp - Guitar, Bass Guitar

About

ChordMapMidi

This app is a MIDI controller for exploring musical chords and progressions in major and minor keys. It sends note information to other synthesizer apps on your device, making it a portable tool for musicians and educators.

Highlights
  • Explore chords and progressions
  • Major and minor keys
  • MIDI controller functionality
  • Sends note information to synth apps
  • Portable music tool
Read full description

ChordMapMidi allows you to explore chords and chord progressions in both major and minor keys, one finger tap at a time. Note: ChordMapMidi is a MIDI controller. It doesn't create sound on its own. It sends note information to synthesizer apps you have on your device. ChordMapMidi is useful for songwriters, MIDI musicians, music educators... especially in places where the only instrument you have is the phone in your pocket. Have fun exploring chords and progressions!

Screenshots

Alto4 screens
ChordMapMidi4 screens

Verdict

The call

The clearest difference is rating: ChordMapMidi at 5.0 against Alto's 4.3. ChordMapMidi also leads on price ($3.99 vs $4.99). Alto's advantage is update cadence (every 2 months vs every 8 months) and review sentiment (67% vs 53%). 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

Alto costs $4.99 and ChordMapMidi $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ChordMapMidi holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 6 and 5 respectively. Written reviews complicate that: 67% of Alto's written reviews are positive against 53% of ChordMapMidi's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Alto ships an update every 2 months, ChordMapMidi every 8 months. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.

Scorecard4 real differences · 6 level
Alto versus ChordMapMidi: the parameters behind the verdict, then further details
ParameterAltoChordMapMidi
Price$4.99$3.99 — better
Rating4.3 (6 ratings)5.0 (5 ratings) — better
Positive reviews66.7% of reviews — better52.9% of reviews
Number of ratings6 — better5
Update frequencyEvery 2 months — betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad — betteriPhone
Requires iOS16.616.6
Further details — not scored
Size2 MB4 MB
Age rating4+4+
DeveloperErik LeeMalcolm Mugglin

Customer experience

Alto

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews6 reviews
Positive66.7%
Neutral16.7%
Negative16.7%

ChordMapMidi

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews17 reviews
Positive52.9%
Neutral11.8%
Negative35.3%

In-app purchases

None

Alto

No in-app purchases

None

ChordMapMidi

No in-app purchases

Questions

Is Alto free?
Alto costs $4.99, with no in-app purchases.
Is ChordMapMidi free?
ChordMapMidi costs $3.99, with no in-app purchases.
Which has better reviews, Alto or ChordMapMidi?
ChordMapMidi is rated higher. Alto averages 4.3 out of 5 from 6 ratings, while ChordMapMidi averages 5.0 from 5 ratings.
Do Alto or ChordMapMidi have ads?
Neither Alto nor ChordMapMidi shows ads.
Which is updated more often, Alto or ChordMapMidi?
Alto ships an update every 2 months, and ChordMapMidi every 8 months. Most recently, Alto was updated on October 31, 2026 and ChordMapMidi on November 1, 2026.

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