Trombone Trainer

Trombone Trainer is a trombone slide position chart, sight-reading trainer and practice game for brass players. Read the music, move to the correct slide position as each note sounds, and the app scores you in real time, so you build the link between what you see on the staff, what you hear and where your slide goes.

New in 4.0 — Sight-Read:

• Endless new trombone music to read at sight in bass clef, written fresh each time you tap New song, so you never play the same exercise twice.

• 24 styles: etudes, jazz, bebop, bossa nova, blues shuffle, ballads, rock, funk, baroque, Balkan, samba, marches, waltzes, klezmer, salsa, Irish folk, ragtime, tango and more, plus technique drills and rhythm reading.

• You choose the length (4 to 32 bars), the rhythm level (quarters, eighths, or triplets and dotted figures) and the tempo. A count-in starts you off, and chords and a bass line play along.

• Play with touch or the arm slide. Every note turns green, amber or red as you play; tap a note to see what happened: wrong position, late, or missed.

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 every note marked green, amber or red and a clean-run detector that rewards mistake-free passes.

• Learner mode — no metronome: each note sounds only when you place the slide on it, so you can work out a passage at your own pace.

• Transcribe by ear — play a passage on your instrument and the app writes it onto the staff, note by note, in your key.

• 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 practice.

• Track your progress — daily, weekly and monthly trends (Sight-Read included), streaks and unlockable badges, plus a stats screen for every song with an accuracy-over-time chart.

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 seven major scales, fully scored, and Sight-Read etudes of 4, 8 or 12 bars.

• Upgrade to Standard to unlock every song and every Sight-Read style and length, import songs and libraries, and share songs; Pro adds creating, deleting and exporting whole libraries. Standard comes as a yearly subscription with a 7-day free trial or as a one-time purchase; Pro is a one-time purchase.

Whether you're a beginner learning where the slide positions are or an advancing player learning to read whatever lands on your stand, Trombone Trainer keeps your practice focused, musical and measurable.