This creative sampler and looper allows you to capture sound, transform it into dynamic tape loops, and build intricate patterns and instruments. Shape your audio into a playable performance with advanced sequencing and mixing tools. It supports AUv3 hosting and offers iCloud syncing for seamless project workflow across devices.
1.2
October 28, 2026
RUN4 1.2 - Tape: Crop to Loop, Copy Loop, and Paste (Replace) - Send or bounce loops to another tape, Poly, a Kit pad, Memory, or Files - Full-screen waveforms for Tape and Disc - Paint gestures: Bend, Brake, Catch, Fold, Squeeze, and Rub - My Scales: custom scales shared by Poly, TÓLF, and the AUv3 - Detect from Track: tempo detection with half- and double-time options - Poly sampler: Lead · Loop · Tail playback - Disc: tap to load, with time readouts on the IN and OUT handles - Fixes for recording sync, overdubbing, and MIDI
More$3.99
TÓLF 12-Track Sequencer
Unlock the complete TÓLF creative sequencer.
RUN4 is a four-track tape and texture machine for iPhone and iPad. It allows you to capture sound, create moving tape loops, build patterns and instruments, and shape audio into a playable performance.
RUN4 features three material modes: Tape for recording and looping sound, Poly for playing samples and synth voices, and Disc for streaming long-form audio.
Yes, RUN4 supports hosting compatible AUv3 instruments and effects within the app. You can also load RUN4 as an AUv3 effect or instrument in other compatible hosts.
Projects can be saved locally or synced between iPhone and iPad using iCloud. Note that third-party AUv3 plugins need to be installed on each device used to open a project.
No, RUN4 does not contain advertisements. It is a premium application with a one-time purchase price.
TÓLF is an optional one-time in-app purchase that adds 12 additional tracks to RUN4, including sampler, synth, and granular voices, along with four pattern generators. It can be restored on any device using the same App Store account.
RUN4 is designed for iPhone and iPad. It is compatible with devices running iOS/iPadOS and has an age rating of 4+.
RUN4 was last updated on October 24, 2026, with version 1.1.1. This indicates a recent update, suggesting ongoing development and support.
