# Alto vs ChordMapMidi

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.

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

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.

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.

## The numbers

| Metric | Alto | ChordMapMidi |
| --- | --- | --- |
| Price | $4.99 | **$3.99** |
| Rating | [4.3 (6 ratings)](https://appshunter.io/ios/app/alto-musical-instruments/id317691743/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/chordmapmidi/id533859936/reviews)** |
| Number of ratings | **6** | 5 |
| Positive reviews | **66.7% of reviews** | 52.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 8 months |
| Monetization | Paid | Paid |
| Size | 2 MB | 4 MB |
| Requires iOS | 16.6 | 16.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Erik Lee](https://appshunter.io/developer/302856905) | [Malcolm Mugglin](https://appshunter.io/developer/533859939) |

## What reviewers say

### Alto

[App page](https://appshunter.io/ios/app/alto-musical-instruments/id317691743)

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:** macOS Compatibility

**In-app purchases:** none


### ChordMapMidi

[App page](https://appshunter.io/ios/app/chordmapmidi/id533859936)

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

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*