📈Last 7 days+72 installs — 5% slower than the week before (+76) · 7/day since Oct 7
🏆Among Education appstop 7% by installs gained this week (2230 peers growing)
🛠Updatesactively updated · updated 25 days ago · every ~14 days (2 updates tracked)
Installs since launch
+231 installs
since Oct 7
Update history
3.0.0Oct 19, 2026 · seen Oct 28, 2026
Trombone Trainer now works in portrait: turn your phone upright for four lines of music, with the slide appearing only while you play, and the arm slide works upright too. Portrait sets the F attachment aside and scores the plain tenor slide; turn back to landscape to use it. Standard now also comes as a yearly plan that starts with a free week, alongside the one-time unlock. And sharps and flats
2.3.0Oct 5, 2026 · seen Oct 18, 2026
New: the arm slide. Move your arm and the slide follows — the front camera reads how far the phone is from your face, so you play positions the way you do on a real trombone. Fit it to your reach in two taps and fine-tune any position (Settings → Trombone). Nothing is recorded or leaves your device. Also: exercises now start at a gentler 100 BPM, and the scale list opens on the easiest keys first.
Trombone Trainer is an education app by Edmund Trujillo with 100+ downloads (about 350 estimated). +72 installs in the last 7 days. Released Aug 6, 2026. Install growth, rank history, SDKs and ad networks.
From the store listing: “Trombone slide position chart, scales & brass practice — scored in real time.”
