rapDo! vs Harmi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
rapDo!
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rapDo! is your digital rhythm coach. You don’t need an instrument and can learn and practice anytime, anywhere. You’ll learn rhythm like a language, using just five syllables. You start with simple rhythm "words" and progress to rhythm "sentences." This approach covers all possible rhythms found in classical music, pop, dance music, and jazz. rapDo! adapts to your progress: mastered rhythms are set aside, while challenging rhythms are repeated until you perfect them. At the same time, you’ll see how the spoken rhythms look in standard notation, allowing you to learn rhythm and sight-reading simultaneously. Learning with tonal syllables is a proven and globally recognized method. It is much faster and more effective than calculating with note values (quarter notes, eighth notes, sixteenth notes, etc.). The rapDo! method is scientifically grounded. Its foundation is based on the groundbreaking teaching work Learning Sequences in Music by Edwin Gordon. For more information, visit www.herbertschiffels.de
Harmi
Learn to read and play music using your phone as the instrument. This app teaches fundamental music theory, including notes, rhythm, and chords, through engaging games and short practice sessions. Progress through ranks as you master new musical skills.
- Learn music notation
- Practice rhythm and pitch
- Play real songs
- Interactive music games
- Progress tracking with ranks
- Ear training exercises
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Learn to play music with no instrument. Your phone is the instrument: you read real notes and play them on the keys, in time with a band, anywhere you are. Most people never start, or quit early, because practice needs an instrument, a room and a free evening. Harmi takes all three out of the way: two minutes in a queue is a real practice session. Harmi teaches the part of music every instrument shares: reading the staff, rhythm, keys, chords and a trained ear. You read real notes in the first few minutes, play real songs soon after, and by the end you can look at a piece of sheet music and know what it says. WHERE YOU START Harmi asks you one question: how much can you read already? "Completely new" is the most common answer - but Harmi is built for both ends of that question: people who have never read a note, and players who already can and want practice that genuinely pushes them. Say you're new and you go straight into a warmup - no theory, no quiz, just sound and pattern. You'll read your first note within a couple of minutes of opening the app. Already read a bit? A quick check places you further along, so you skip what you know. WHAT IT ACTUALLY FEELS LIKE Short goes. A couple of minutes each. One idea at a time - Harmi shows you, you try it, you're done. Then you practice it in a game - reading music is a reflex, not a fact, and reflexes only come from reps you enjoy. YOU'LL WATCH YOURSELF GET BETTER You start out a Listener and end up a Maestro. The ten ranks in between aren't points - each one is something you can genuinely do. Beat Keeper, when rhythm lands. Note Reader, when the staff goes quiet and legible. Streaks, hearts and three-star lessons are what bring you back tomorrow. Shields cover a missed day; a perfect run banks a Grace Note that forgives your next slip. Run out of hearts and lessons pause till tomorrow - the games and drills stay open, always. SIX WAYS TO PRACTICE • On Air - jam with the band while the groove builds under you • Playlist - play real songs you already know by ear • Speed Drill - 45 seconds against your own best • Moving Notes - sight-read notes as they scroll past • Melody Simon - hear a phrase, tap it back • Survival - pure ear training, one mistake and you're out Every one puts real notation on a real staff - you're reading music, not tapping colored buttons that stand in for it. That's why it transfers the moment you open real sheet music. Chase personal bests, climb the heat in On Air, or survive on ear alone; the ceiling is a long way up. WHAT YOU'LL LEARN More than 100 lessons across 14 chapters, in the order the material actually builds: • The treble staff - every line and space, until they're instant • Rhythm - note values, rests, 4/4 and 3/4, ties, dotted notes • Pitch and the piano - half and whole steps, scales, sharps and flats • Keys and intervals - key signatures, fifths and octaves by ear • Chords - major, minor, diminished, augmented, inversions, I-IV-V • Reading real pages - dynamics, tempo, articulation, repeats, the grand staff, other clefs, full sight-reads • The bass clef - the whole thing again, from the bottom up WHEREVER YOU’RE COMING FROM • No instrument required - your phone is enough • Play without an account, or make one and it follows you anywhere SUBSCRIPTION Harmi is free to start. Harmi Unlimited removes the daily heart limit so you can practice as much as you want: • Monthly - $8.99 • Annual - $49.99, with a 7-day free trial Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the period ends. Manage or cancel your subscription in your Account Settings after purchase. Terms of Use: https://www.harmiapp.com/terms Privacy Policy: https://www.harmiapp.com/privacy
Screenshots
Verdict
The clearest difference is price: Harmi at Free against rapDo!'s $2.99. Harmi also leads on iOS requirement (15.0 vs 17.0). rapDo!'s advantage is in-app purchases (none vs 2). On ads and device support 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
Harmi is free to download; rapDo! costs $2.99 up front. Harmi sells 2 in-app purchases, starting at $8.99 per month. rapDo! asks for nothing beyond the download.
| Parameter | rapDo! | Harmi |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | — | 5.0 (7 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 7 — better |
| Update frequency | — | Every 2 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 76 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Fabian Metzger | Christina Boutros |
In-app purchases
rapDo!
No in-app purchases
Harmi
- Monthly$8.991 Month
- Annual7 Days trial$49.991 Year









