Trombone Trainer vs Clefkid
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Trombone Trainer
This app helps brass players improve their trombone slide technique through interactive exercises and real-time scoring. It offers a slide position chart, ear transcription, and built-in practice libraries. Track your progress with detailed statistics and unlockable badges.
- Interactive slide position chart
- Real-time scoring and clean-run detector
- Transcribe music by ear onto staff
- Bass-clef staff notation
- Play-along loops with chords
- Progress tracking and unlockable badges
- Multiple note name display options
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Trombone Trainer is a trombone slide position chart and practice game for brass players. Pick an exercise, hit play, and move to the correct slide position as each note sounds — the app scores your trombone slide positions in real time and highlights the note you're on, so you build the link between what you see on the staff, what you hear, and where your slide goes. Built for trombonists: • Arm slide — play it like a real trombone. Hold the phone in front of you and move your arm: the front camera reads how far the phone is from your face, and the on-screen slide follows, position for position. Fit it to your own reach in two taps, then fine-tune any position. It’s optional — touch still works — and nothing is recorded or leaves your device. • Interactive slide position chart — the on-screen chart shows the right slide position for every note (all seven), and real-time scoring gives you credit for holding it as the note plays, with a clean-run detector that rewards mistake-free passes. • Transcribe by ear — play a passage on your instrument and the app writes it onto the staff, note by note, in your key, so you can build or fix a song without tapping each one. • Bass-clef staff — everything is written and read in bass clef, the way trombone music actually looks. • Play-along loops — eight measures on the staff, played back with a piano-style chord under each measure, so you train positions in a musical context, not in silence. • Alternate positions — set your own preferred slide position for notes that can be played in more than one place. • Swipe to control — swipe left/right to change tempo. • Trombone scales and studies — built-in libraries of major and minor scales, chromatics, arpeggios, and technical etudes for daily brass practice. • Track your progress — daily/weekly/monthly trends, streaks, and unlockable badges, plus a full stats screen for every song with an accuracy-over-time chart. Your best score, average, and attempt count show right in the song list. Read music your way: • Note names in letters (C D E), German (H / B), or fixed-do solfège (Do Re Mi) — switch independently of the app language. • Available in English, Spanish, French, German, Portuguese, Italian, Japanese, Korean, Dutch, Polish, Swedish, Norwegian, and Chinese. Free to start: • The free version includes trombone scale libraries so you can practice positions right away. • Upgrade to Standard to unlock every song, import songs and libraries, and share songs; Pro adds creating, deleting, and exporting whole libraries. Both are one-time purchases — no subscription. Whether you're a beginner learning where the slide positions are or an advancing brass player pushing tempo, Trombone Trainer keeps your trombone practice focused, musical, and measurable.
Clefkid
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Learn to read music notes, one note at a time. Clefkid is a calm note-reading practice app for kids and beginners. A note appears on the treble clef staff, you tap its letter name, and you get a clear correction if you miss. No countdowns, no pressure, and no daily practice cap. HOW IT WORKS • See a note on the staff and tap the letter: C, D, E, F, G, A or B • Hear each note aloud, replay it any time, or switch sounds off in Settings • Miss it? Clefkid shows the right note name and you try again before moving on • Each round is 8 notes, so practice fits into a few spare minutes PRACTICE WHAT MATTERS • Progress shows which notes feel familiar and which still need work • Tap any note on the Progress screen to practice just that note • First-try accuracy is tracked separately, so a correction never counts as a first-try answer GROWS WITH YOUR CHILD • Beginner range: 8 notes from middle C (C4) to C5 • Treble range: 15 notes from C4 to C6, including ledger lines • Works for anyone learning to read treble clef, whether they play piano, recorder, violin or another instrument FOR PARENTS • Parent view shows practice time, first-try accuracy, streak and recent rounds • Works offline, with no account and no ads • Practice records stay on this device. We do not collect data from this app. • VoiceOver support describes where the note sits on the staff without giving away the answer Clefkid is a practice tool for note names. It is not a full music course and does not check playing on an instrument.
Screenshots
Verdict
The clearest difference is in-app purchases: Clefkid at none against Trombone Trainer's 2. On price, update cadence, 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
Both are free to download. Trombone Trainer sells 2 one-off in-app purchases. Clefkid asks for nothing beyond the download.
Trombone Trainer ships an update every 5 days, Clefkid every 3 days. The most recent releases landed on October 19, 2026 and October 26, 2026 respectively.
| Parameter | Trombone Trainer | Clefkid |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 106 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Edmund Trujillo | Ylemos inc |
In-app purchases
Trombone Trainer
- Standard — All Songs$19.99
- Pro — Author & Export$39.99
Clefkid
No in-app purchases
Questions
Is Trombone Trainer free?
Is Clefkid free?
Do Trombone Trainer or Clefkid have ads?
Which is updated more often, Trombone Trainer or Clefkid?
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