RUN4 - Tape & Texture Machine
Creative Sampler & Looper
$12.99 · In‑App Purchases · Designed for iPad. Not verified for macOS.
RUN4 is a four-track Tape & Texture Machine for iPhone and iPad. Capture sound, turn it into moving tape loops, build patterns and instruments, then shape everything into a playable performance.
THREE MATERIAL MODES
• Tape — record, overdub, loop, freeze and recall sound. Listen/Capture can turn the last seconds of RUN4’s internal mix into new material.
• Poly — play samples, classic synth and 4-operator FM voices, hosted AUv3 instruments and step patterns.
• Disc — stream and perform long-form audio.
SEQUENCE
Build patterns with up to 64 steps, Euclidean tools, step locks, probability, variation, randomization and count-in.
SHAPE EVERY TRACK
Move through Grain, Tone, Color and Air. Use device presets, the modulation matrix and four send busses, then finish your mix inside RUN4 with Tone, Drive, Glue, OTT, Width and Limiter.
Export final mixes or individual WAV stems.
BUILT TO PERFORM
Switch sets, control macros and punch-in effects, run audio-reactive visuals, sync via MIDI Clock or Ableton Link, and map external MIDI controls.
Dark or light appearance. Same instrument.
AUv3 + PROJECT WORKFLOW
Host compatible AUv3 instruments and effects inside RUN4, or load RUN4 as an AUv3 effect, source or instrument in a compatible host.
Save projects locally or sync them through iCloud between iPhone and iPad. Third-party AUv3 plugins must be installed on every device used to open a project.
Also includes Bluetooth MIDI, CC Learn, AudioShare import, offline bounce and a searchable in-app manual.
TÓLF — TWELVE MORE TRACKS
TÓLF is an optional one-time in-app purchase that adds 12 additional tracks to RUN4’s four-track workflow.
• 12 additional tracks with sampler, synth and granular voices.
• Four pattern generators — Euclid, Walk, Cascade and Bloom.
• Record TÓLF tracks or groups directly into RUN4’s Tape tracks.
• Export TÓLF stems and MIDI.
TÓLF can be unlocked from Settings and restored on any device using the same App Store account.
TÓLF is RUN4’s only in-app purchase. Everything else described above is included with the main app.
Ratings & Reviews
New
- Bloom time-stretch: Speed now changes time without changing pitch. Existing projects sound exactly as before.
- Bloom Repeat: play a head's slice 2–8 times per loop, in time with the tape.
Fixes
- Bloom: playheads stay inside their Start/End range, and the range is shown on the waveform.
- Classic synth: Release now fades out instead of cutting off.
- Granular: synced Division shows note values (1/4, 1/8T …).
- Perform: Filter sliders follow the DJ Filter live.
- Poly sequencer: steps select reliably, also with Apple Pencil.
- Sliders reach fully off and on more easily.
The developer, Eugen Schott, 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
- Eugen Schott
- Size
- 202.8 MB
- Category
- Music
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- TÓLF 12-Track Sequencer $3.99
- Copyright
- © 2026 Eugen Schott