Pro
The free app already covers the metronome, tuner, practice player and YouTube looping. Pro adds the practice you can't easily do alone — hearing a song without your own part, holding time without a click, polyrhythms, and click sounds that cut through a real rehearsal.
Turn your sound on · Full mix → drums only → bass only → guitar only
Headline feature
Drop in an MP3 and an on-device AI (Demucs) splits it into six parts: drums, bass, guitar, piano, vocals and other. Nothing is uploaded; it runs on the phone's CPU, offline.
Then switch parts on and off. Mute the bass and play it yourself, keep only the drums to lock in the groove, or leave the guitar alone to copy a line. Long-press a part to solo it.
Speed, key and A/B loop keep working on top. 0.7×, a semitone down, eight bars on repeat — with part focus on. Export renders exactly the mix you're hearing.
Everything else in Pro
Two meters at once — 3 over 4/4, 2 over 3/4. The main beat follows the BEAT meter; the cross beat fits 2–7 evenly spaced hits into each bar. The cross sound (cowbell, rimshot…) and its volume are set separately, and the beat LEDs under the dial show both rows so you can see where each hit lands.
Some bars with the click, some without. Hold time through the silent bars and check whether you land exactly when the click returns. Beat LEDs keep blinking during silence so you can still see the pulse. Combine with the tempo trainer to raise the tempo while training in silence.
Sounds built for rehearsal rooms where the stock click disappears under a drum kit. The clip runs through woodblock, rimshot, cowbell, hi-hat and beep — preview each one in the sheet. Turn on voice count and strong beats are spoken ('one, two, three, four') while subdivisions stay as clicks. Korean, English and Japanese.
Sustains the note selected in the tuner. Intonation practice for winds and strings, a vocal reference, or a tuning reference when there's no amp. Change the A4 reference (430–450 Hz) and the drone follows.
Let the phone listen to the track playing in the room — or a YouTube original — for a few seconds and it finds the BPM and drops it into the metronome. Watch the confidence climb in the header; once it locks, the click starts at that tempo.
Loop trainer repeats your A/B section a set number of times, then steps the speed up — from 0.7× to 1.0×, hands-free. Audio export renders the current settings — loop, speed, key and part focus — to an M4A or WAV and hands it to the share sheet. Handy for sending 'practice it at this tempo' to the band chat.
Recordings from the practice player convert to tagged M4A with album art and share straight out. Bookmarks export as a single file and restore on another device, so a new phone doesn't cost you your practice sections.
Buy from Menu › Pro inside the app. One-time purchase through the app store, no subscription. Part focus downloads the separation model (about 110 MB) once on first use.