Music Notes vs IDOUDO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Music Notes
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.
- 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
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Build music-theory habits into faster sight reading: read notes with better accuracy, and fix mistakes right away. This app turns practice into a clear learning path: start with the fundamentals, then progressively cover notes, rhythm, tonality, and harmony. You get instant feedback, plus wrong-answer review and progress stats—so you can correct errors and read faster. What you will train (by modules): • Note recognition: locate staff positions and clef mapping, then pick the correct note • Note values & rests: read lengths together with “silence” (rests) • Time signature & rhythm: build strong-beat cycles and bar-level structure • Interval recognition: connect pitch relationships for faster recognition • Scale recognition & key signature: learn how scales and key signatures are written • Chord recognition & modes: read harmonic color with more confidence • Musical terms: spot common expression and performance markings quickly • Ornament recognition: read trills/appoggiaturas/passing tones without missing them • Harmonic progression & harmonic analysis: follow the logic, improve prediction Two ways to practice: 1) Learning Path: clear stages (Stage 1–8). Pass levels to unlock the next steps. Some further progress may require a subscription. 2) Free Practice: choose the modules you want to strengthen, set the training range/difficulty, and keep reviewing your progress. Results you can see: • Progress curve and module-level stats: spot weak areas and watch improvements • Wrong-answer feedback & review: turn “why I missed it” into your next training step Who it's for: • Students and self-learners who want faster, more accurate sight reading • Learners who need structured music theory practice • Anyone preparing for music school exams or theory/reading assessments - The subscriptions are $1.99 weekly with free trial - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that service, where applicable`` - Terms of use:https://muscifeedback.oss-cn-beijing.aliyuncs.com/RecognitionTerms_en.html - Privacy of use: https://muscifeedback.oss-cn-beijing.aliyuncs.com/RecognitionPrivacy_en.html
IDOUDO
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Read notes fast in movable Do. Name the notes you hear. Sing famous melodies in all 12 keys. IDOUDO is a solfège app for practicing all three, a few minutes a day — for jazz and pop sessions, playing by ear, and reading parts in choirs and ensembles, so a key change never throws you off. Ear Training and Melody Shadowing are new in version 1.1. 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 Reading • Single notes: 1 Note, 2 Notes • 1 Triad • 1 Seventh Chord Listening • Ear training: 2, 3, and 4 notes • Melody Shadowing: Major set 1, Major set 2, Minor set 1 EAR TRAINING After a Do-Mi-Sol chord, listen to the notes and name them in movable Do. The answer buttons form a "staircase" from low on the left to high on the right, so you answer the pitch height too. A foundation for playing by ear. MELODY SHADOWING Hum short melodies from famous pieces in movable Do while the key changes. There is no scoring. Each time the key changes, an I–ii–V–I cue sets the new key's Do in your ear, and Do keeps sounding as the accompaniment while you sing. Songs: Twinkle Twinkle Little Star, Canon, When the Saints Go Marching In, Ode to Joy, Swing Low, Sweet Chariot, Furusato, Sakura Sakura, Fate (Symphony No. 5), and Kojo no Tsuki (minor keys are read from La). It is also good practice for the pentatonic and major scales. 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 • Pin the drills you practice to the top of Home • Built-in know-how, including how to practice each drill • 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 in either of two ways: • A one-time in-app purchase for each drill • All Drills, an auto-renewable subscription (monthly with a 1-month free trial, or yearly) that also includes drills added in the future. Prices are shown in the app and on the App Store. The subscription renews automatically at the same price unless canceled at least 24 hours before the end of the current period. Payment is charged to your Apple Account. Manage or cancel it in Settings > [your name] > Subscriptions. The free trial is available once, on the monthly plan; cancel at least 24 hours before it ends and you won't be charged. No ads are displayed, and no account registration is required. Profiles and practice records are stored on your device. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Music Notes | IDOUDO |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (17 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 17 — better | — |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 68 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | 凯 张 | Kosuke Mawatari |
In-app purchases
Music Notes
- Weekly Subscription · Notes Tutor$1.997 Days
- Lifetime Access · Notes Tutor$9.99
IDOUDO
- All Drills (Monthly)1 Month trial$2.991 Month
- All Drills (Yearly)$19.991 Year
- Unlock All Keys: Ear 2 Notes$1.99
- Unlock All Keys: Ear 3 Notes$1.99
- Unlock All Keys: Ear 4 Notes$1.99
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- Unlock All Keys: Major Set 1$1.99
- Unlock All Keys: Minor Set 1$1.99
- Unlock All Keys: Major Set 2$1.99
- Unlock All Keys: 1 Triad$1.99
- Unlock Keys: 1 Seventh Chord$1.99









