RUN4 vs Vesper MultiEffect
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RUN4
Create music with a four-track tape and texture machine. Record, loop, and shape sounds into playable performances using various material modes and sequencing tools. Export mixes or individual stems.
- Four-track tape and texture machine
- Three material modes: Tape, Poly, Disc
- 64-step sequencer with Euclidean tools
- Track shaping with Grain, Tone, Color, Air
- AUv3 instrument and effect hosting
- MIDI Clock and Ableton Link sync
- Export mixes and WAV stems
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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.
Vesper MultiEffect
This app is a stereo delay and reverb effect for iPhone and iPad, allowing users to sculpt sound with interactive surfaces for time, space, and pitch manipulation. It offers extensive modulation, sequencing, and a built-in looper for creative audio processing.
- Stereo delay and reverb engines
- Interactive TIME, SPACE, and FRACTURE surfaces
- Six echo arrangements and eight space voices
- Modulation, step sequencing, and pitch processing
- Three-layer stereo looper
- 100 factory presets
- AUv3 audio effect compatible
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TURN A NOTE INTO SOMEWHERE ELSE. VESPER is a stereo delay and reverb playground for iPhone and iPad. Start with a tight rhythmic echo, stretch it into a suspended room, then pull the sound apart with your fingertips. Use it as a standalone effect or load its AUv3 extension in a compatible music app. TOUCH THE SOUND Open Wave Field and the pedal unfolds into three interactive surfaces: TIME, SPACE and FRACTURE. Drag to reshape connected groups of parameters, from repeat spacing and feedback to room size, pitch and memory. Depth controls add another dimension. Keep the transformation, restore your starting point, or save a new preset. TWO ENGINES. MANY DIRECTIONS. Combine six echo arrangements with eight space voices. Explore pitch-shifted trails, reverse textures, stereo cross-feedback and moving diffusion. Choose how the engines feed each other, place processors across ten insert slots, and move between host-synced subdivisions and free timing. SOUNDS THAT KEEP MOVING Six modulation sources, a sixteen-step sequence and twelve modulation routes bring motion to your sound. The BECOME control performs a dedicated transformation in each factory preset. Freeze a texture, ride the mix, or use Memory Glass to introduce pitched fragments of recent audio. 100 PLACES TO START The included factory collection ranges from Impossible Rooms and Clockwork & Trouble to fractured rhythms, altered gravity and long-form textures. Search sounds by name, collection or tags, mark favourites, compare A/B states, and import or export your own presets. BUILD A PHRASE Capture up to 20 seconds of stereo audio in the iOS looper. Add up to three layers, adjust their levels, reverse playback or switch to half speed. Choose where the loop records and returns in the signal path. MADE TO PLAY A detailed pedal interface brings the main sound controls within reach, with a multifunction display for deeper editing. Dry/Wet and output makeup gain let you place the effect around your source. Wave Field turns sound design into a performance gesture. INCLUDED • Standalone app and AUv3 audio effect for iPhone and iPad • Stereo delay and reverb engines with flexible routing • Interactive TIME, SPACE and FRACTURE surfaces • 100 factory presets with individual BECOME transformations • Modulation, step sequencing, pitch and memory processing • Three-layer stereo looper • Preset search, favourites, A/B comparison and import/export Requires iOS/iPadOS 16 or later. AUv3 operation requires a compatible host app, available separately. Standalone live input requires microphone permission; headphones or an audio interface are recommended. An internal AUDITION phrase lets you explore sounds without connecting an instrument. Loop recordings are session-only and are not stored in presets or host state. Presets can be transferred between standalone and host instances using export/import. Created by NextEpochs.
Screenshots
Verdict
The clearest difference is in-app purchases: Vesper MultiEffect at none against RUN4's 1. RUN4's advantage is price ($12.99 vs $19.99) and chart position (#75 vs unranked). On rating, review sentiment, ads and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
RUN4 costs $12.99 and Vesper MultiEffect $19.99 up front. RUN4 sells 1 one-off in-app purchase. Vesper MultiEffect asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for RUN4 against 5.0 for Vesper MultiEffect. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
| Parameter | RUN4 | Vesper MultiEffect |
|---|---|---|
| Price | $12.99 — better | $19.99 |
| Rating | 5.0 (4 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 2 days | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Paid |
| Best chart rank | #75 — better | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 197 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Eugen Schott | Mike Gazzaruso |
Customer experience
RUN4
Vesper MultiEffect
In-app purchases
RUN4
- TÓLF 12-Track Sequencer$3.99
Vesper MultiEffect
No in-app purchases









