RUN4 1.7

RUN4 is a four-track Tape & Texture Machine for iPhone and iPad.

filecart iOS Updated Nov 14, 2026
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About RUN4

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. Bloom turns one playhead into a cloud, Command plays the tape with steps.
• Listen and Capture turn the last seconds of RUN4's internal mix into new material.
• Poly — play samples, a classic synth, 4-operator FM, Keys (Tine,
Reed, Felt and Organ), macro-oscillator models, wavetables or hosted AUv3 instruments.
• Disc — stream and perform long-form audio, and scratch the record with your finger.

KIT AND CHOP
• Chop any sample or tape loop onto the pads, at the hits or in equal parts.
• 32 pads in four banks, each with In and Out, Gate or One-shot, Reverse, Choke, Pitch, Gain and envelope.
• KIT puts the pads on the keyboard's white keys.
• Turn any loop into a wavetable and morph through its waves.

SEQUENCE
• Patterns with up to 64 steps.
• Tap a pad onto a step, tap a step to hear it.
• Euclidean tools, step locks, probability, swing, variation, humanize and count-in.

SHAPE EVERY TRACK
• Grain, Tone, Color and Air on every track, with device presets.
• A modulation matrix with LFOs, drawn curves and macros.
• Four send busses, each a RUN4 effect or an AUv3.
• A master chain with Tone, Drive, Glue, OTT, Width and Limiter.
• Export final mixes or individual WAV stems.

BUILT TO PERFORM
• Switch sets and use TEMP for changes you don't keep.
• Macros, the Rune Pad and Punch-in FX for Tapes, TÓLF or both, including a Remix pad.
• Audio-reactive visuals.
• Sync via MIDI Clock or Ableton Link, and map external MIDI controls.
• Five designs, from Standard to Mono, Graphite, Reel and Cream, in light and dark.

AUV3 AND PROJECT WORKFLOW
• Host compatible AUv3 instruments and effects inside RUN4.
• 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.
• Bluetooth MIDI, CC Learn, AudioShare import and offline bounce.
• A searchable in-app manual and a Full Tour of every screen.

TÓLF — TWELVE MORE TRACKS
TÓLF is an optional one-time in-app purchase that adds 12 tracks to RUN4's four-track workflow.
• 12 additional tracks with sampler, synth and granular voices.
• Seven pattern generators: Euclid, Walk, Cascade, Bloom, Orbit, Tide and Collider.
• Arp, Strum, Hold and Harmony Brain for chords and parts in key.
• Patterns, scenes and a song mode.
• Its own punch effects: Gate, Stutter, Reverse, Stop, Crush, Repeat and Fill.
• 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.

License: Commercial
Release info Update on Nov 13, 2026
Release notes This update brings new features, fixes and improvements.

- New: Takes. Choose Takes under Finish and set a fixed length: the recording loops, and every
pass becomes a take.
- Tap a take number to hear it in the loop, and the check to keep it. The last eight passes are
kept.
- With the length on Free, tap TAKE 1 where the loop should end to set the length.
- Takes and the other Finish choices also work when recording from Poly.
- A short message tells you when a take was stopped early and not kept.
- iPhone: the recording setup row no longer cuts off its fields.

Thanks for your feedback. Bugs or ideas: join us on Discord.
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