# Music Notes vs IDOUDO

The clearest difference is iOS requirement: Music Notes at 15.6 against IDOUDO's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Music Notes sells 2 in-app purchases, starting at $1.99 per 7 days and IDOUDO sells 10 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Music Notes | IDOUDO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (17 ratings)](https://appshunter.io/ios/app/music-notes-sight-reading/id6760826661/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Freemium | — |
| Size | 68 MB | 3 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [凯 张](https://appshunter.io/developer/1879659677) | [Kosuke Mawatari](https://appshunter.io/developer/1489564137) |

## What reviewers say

### Music Notes

[App page](https://appshunter.io/ios/app/music-notes-sight-reading/id6760826661)

Improve your music reading skills with structured lessons and instant feedback. This app helps you master note recognition, rhythm, harmony, and more through progressive modules and practice modes. Track your progress and identify areas for improvement to become a faster, more accurate sight-reader.

**Highlights:** Note recognition training, Rhythm and time signature practice, Interval and chord recognition, Scale and key signature learning, Musical term and ornament recognition, Harmonic progression analysis, Progress tracking and stats

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription · Notes Tutor | $1.99 | per 7 days |
| Lifetime Access · Notes Tutor | $9.99 | one-time |


### IDOUDO

[App page](https://appshunter.io/ios/app/idoudo-movable-do-solfege/id6804583806)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Drills (Monthly) | $2.99 | per month |
| All Drills (Yearly) | $19.99 | per year |
| Unlock All Keys: Ear 2 Notes | $1.99 | one-time |
| Unlock All Keys: Ear 3 Notes | $1.99 | one-time |
| Unlock All Keys: Ear 4 Notes | $1.99 | one-time |
| Unlock All Keys: Major Set 1 | $1.99 | one-time |
| Unlock All Keys: Minor Set 1 | $1.99 | one-time |
| Unlock All Keys: Major Set 2 | $1.99 | one-time |
| Unlock All Keys: 1 Triad | $1.99 | one-time |
| Unlock Keys: 1 Seventh Chord | $1.99 | one-time |


## Frequently asked questions

### Is Music Notes free?

Music Notes is free to download, with in-app purchases available.

### Is IDOUDO free?

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

### Do Music Notes or IDOUDO have ads?

Neither Music Notes nor IDOUDO shows ads.

### Which is updated more often, Music Notes or IDOUDO?

Music Notes ships an update every 3 weeks, and IDOUDO every 3 weeks. Most recently, Music Notes was updated on November 5, 2026 and IDOUDO on October 31, 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.*