WBTRK
Pocket groovebox with AUv3
$4.99 · Designed for iPad. Not verified for macOS.
NOW ON SALE!
50% OFF in the first two weeks of August!
WBTRK is a music tracker in the classic mold — rows, steps and patterns — rebuilt for iPhone and iPad with a sample-accurate audio engine. And now it sings.
Write PHRASES (16 steps of notes, chords, instruments and effects), stack them into CHAINS, and arrange chains into a six-channel SONG. Loop a channel independently with STP/JMP markers, re-root a phrase per bar with chain transpose, and let each channel run at its own tempo while staying locked to one clock.
SOUND — 18 engines
• The chip classics: pulse, saw, triangle, FM, noise, supersaw pad, sub, pluck, wavetable (draw your own cycle), and MODX — a dual-oscillator synth with a 4-LFO modulation matrix
• SPEECH: a talking, singing robot. Build words from classic speech-chip sounds or just type them how they sound. TALK mode speaks them from the keyboard; SING mode turns a phrase into a lyric sheet — one note column picks the word, the next carries the melody, and a held syllable bends across notes like a real singer
• GRAIN: a granular cloud over any recording — grain size, density, spray, scan speed and per-grain pitch, from frozen drones to Geiger-counter glitch
• MODAL: struck-resonator percussion — marimba, vibraphone, kalimba, glass and church bells, steel pan — with structure, brightness, ring time and strike position
• SAMPLER: record from the mic or import audio; trim, normalize, loop, ping-pong, reverse — or beat-chop at transients and play slices across the keyboard
• AUv3 HOSTING: play your installed instrument plug-ins from the sequencer, per instrument
• DRONE — three oscillators through a wavefolder into a low-pass gate. Detune them, place each one across the stereo field, and hold a chord for as long as you like.
• RESONATOR — an exciter striking a tuned resonant loop: plucked string, bowed metal, blown pipe.
• TEXTURE — noise through two resonant filters: wind, rain, room tone, breath. Pin the filters or let them follow the keyboard. Ten presets each.
SHAPE IT
• 29 effects per note: delay, reverb, trance gate and autopan with tempo sync, retrigger, chorus, flanger, ring mod, wavefold, bitcrush, slides, vibrato, arps and more
• RANDOM dice that re-roll pitch, volume, envelope and pan on every hit
• Tables: looping per-note programs for instant arpeggios and tremolos
• Per-instrument swing and scale lock, full mixer with per-channel volume, pan, mute and solo
FAST TO PLAY
• The radial wheel: long-press any cell and rotate to dial in notes, chords, instruments or effects — it previews as you turn
• Double-tap places your last note or chord; select, copy, paste and transpose whole sections
• MIDI in (play and record, step or live), MIDI out and MIDI clock for hardware
KEEP IT
• Render your song to WAV, share songs as files, your session autosaves
• A lock-screen player with cover art drawn in your current theme (and a switch to turn it off)
• 26 themes plus a full theme editor — and a hex numbers mode, the way trackers used to count
• A built-in demo song that sings about itself
Everything runs on your device. No account, no ads, no subscription, nothing collected.
An ambient pack: three new engines, a reverb that runs to thirty seconds, and true stereo instruments.
NEW ENGINES
• DRONE — three oscillators through a wavefolder into a low-pass gate. Detune them, place each one across the stereo field, and hold a chord for as long as you like.
• RESONATOR — an exciter striking a tuned resonant loop: plucked string, bowed metal, blown pipe.
• TEXTURE — noise through two resonant filters: wind, rain, room tone, breath. Pin the filters or let them follow the keyboard. Ten presets each.
NEW EFFECT
• XL REVERB — decay from half a second to thirty, with pre-delay, damping and a modulated tail. The original REVERB is untouched, so your existing songs sound exactly as they did.
Better touch handling, and less bugs.
The developer, LASZLO DOBROVOLSZKI, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- LASZLO DOBROVOLSZKI
- Size
- 3.8 MB
- Category
- Music
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 hejluxom

