# Instrument Scales vs SoundNote 〜奏メモ〜

The clearest difference is price: Instrument Scales at Free against SoundNote 〜奏メモ〜's $0.49. Instrument Scales also leads on device support (5 vs 2) and iOS requirement (18.0 vs 26.5). SoundNote 〜奏メモ〜's advantage is in-app purchases (none vs 3) and update cadence (every 4 days vs monthly). On ads there is nothing between them.

Instrument Scales is free to download; SoundNote 〜奏メモ〜 costs $0.49 up front. Instrument Scales sells 3 in-app purchases, starting at $0.99 per month. SoundNote 〜奏メモ〜 asks for nothing beyond the download.

Instrument Scales ships an update monthly, SoundNote 〜奏メモ〜 every 4 days. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Instrument Scales | SoundNote 〜奏メモ〜 |
| --- | --- | --- |
| Price | **Free** | $0.49 |
| Rating | **[4.7 (29 ratings)](https://appshunter.io/ios/app/instrument-scales/id1500152877/reviews)** | — |
| Number of ratings | **29** | — |
| Positive reviews | 91.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 45 MB | 3 MB |
| Requires iOS | **18.0** | 26.5 |
| Devices | **iPhone, iPad, Mac, Apple Watch, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thiago Anderson Martins](https://appshunter.io/developer/1287000521) | [Kouki Yoshimoto](https://appshunter.io/developer/1884780659) |

## What reviewers say

### Instrument Scales

[App page](https://appshunter.io/ios/app/instrument-scales/id1500152877)

Master your instrument with interactive courses, AI-powered guidance, and a comprehensive music toolkit. Learn chords, scales, and theory for guitar, bass, and piano with a precision tuner and custom tuning options.

**Highlights:** Interactive Courses, AI-powered guidance, Precision Tuner, 100+ Scale Library, Custom Tunings, iCloud Sync

**Features:** Family Sharing, Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Instrument Scales Max | $0.99 | per month |
| Instrument Scales Max | $3.99 | per year |
| Instrument Scales Pro | $0.99 | one-time |


### SoundNote 〜奏メモ〜

[App page](https://appshunter.io/ios/app/soundnote/id6772681513)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Instrument Scales free?

Instrument Scales is free to download, with in-app purchases available.

### Is SoundNote 〜奏メモ〜 free?

SoundNote 〜奏メモ〜 costs $0.49, with no in-app purchases.

### Do Instrument Scales or SoundNote 〜奏メモ〜 have ads?

Neither Instrument Scales nor SoundNote 〜奏メモ〜 shows ads.

### Which is updated more often, Instrument Scales or SoundNote 〜奏メモ〜?

Instrument Scales ships an update monthly, and SoundNote 〜奏メモ〜 every 4 days. Most recently, Instrument Scales was updated on October 24, 2026 and SoundNote 〜奏メモ〜 on October 14, 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.*