# IDOUDO: Movable Do Solfège — 12-key sight-reading, 3 clefs

> 12-key sight-reading, 3 clefs (iPhone/iPad app by Kosuke Mawatari.)

- Source: https://appshunter.io/ios/app/idoudo-movable-do-solfege/id6804583806 (this page in markdown: same URL + `.md`)
- Developer: [Kosuke Mawatari](https://appshunter.io/developer/1489564137)
- Category: Music, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English, Japanese
- Released: 2026-08-29
- Data updated: 2026-09-20
- User reviews in markdown: https://appshunter.io/ios/app/idoudo-movable-do-solfege/id6804583806/reviews.md

## What is IDOUDO?

IDOUDO is a practice app for quickly reading notes on the staff with movable Do in each key.

Answer each displayed note using the Do, Re, Mi, Fa, Sol, La, and Ti buttons. When the key changes, the same position on the staff has a different movable-Do syllable. Practice this essential movable-Do skill repeatedly in all 12 keys.

In addition to treble and bass clefs, IDOUDO supports the alto clef, a feature rarely found in music practice apps. It is useful both for the daily practice of musicians who read alto-clef music and for those who want to become more fluent in every key as they expand into jazz and pop sessions.

If you are just beginning to read staff notation, start with the key of C. In C, Do–Re–Mi and C–D–E correspond directly, so you can also use IDOUDO to practice the fundamentals of reading standard notation.

DRILLS IN VERSION 1.0
• 1 Note
• 2 Notes
• 1 Triad
• 1 Seventh Chord

KEY FEATURES
• Practice in all 12 keys
• Treble and bass clefs, plus the alto clef used by viola
• Note ranges for piano, guitar, violin, viola, cello, wind instruments, voice, and more
• Beginner, Intermediate, Advanced, and Custom ranges
• Fast 10-question rounds
• Average response time, mistakes, and personal-best records
• Up to 50 local profiles
• Shareable result cards and progress
• Light and Dark Mode

READ CHORDS WITH MOVABLE DO
For triads and seventh chords, answer chord tones from bottom to top. The result also shows the chord symbol and Roman-numeral degree name.

NEW TO STAFF NOTATION?
The in-app Getting Started with Staff Notation guide explains why the key of C is a good place to begin, includes a quick note-reference chart, and shows how to use the app for classical music, ensemble playing, and sessions, with a suggested practice path.

PRICING
Keys C and G are free in every drill. The other 10 keys can be unlocked permanently with a separate one-time in-app purchase for each drill. There is no subscription.

No ads are displayed, and no account registration is required. Profiles and practice records are stored on your device.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock All Keys: 1 Note | $1.99 | one-time |
| Unlock All Keys: 2 Notes | $1.99 | one-time |
| Unlock All Keys: 1 Triad | $1.99 | one-time |
| Unlock Keys: 1 Seventh Chord | $1.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-08-29

No release notes.

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## More apps by Kosuke Mawatari

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All apps by Kosuke Mawatari: https://appshunter.io/developer/1489564137

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-20.*