RUN4 vs Tracker Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RUN4
Create dynamic music with a four-track tape and texture machine. Record, loop, and build complex patterns with various sound engines and effects. Expand your creative possibilities with optional additional tracks and advanced sequencing tools.
- Four-track tape machine with looping
- Multiple sound modes: Tape, Listen, Poly, Disc
- Sample chopping and pad sequencing
- Pattern creation with Euclidean tools
- Track shaping with effects and modulation
- AUv3 instrument and effect hosting
- Optional 12-track expansion (TÓLF)
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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. 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.
Tracker Pro
Create music with samples, synthesizers, and Audio Unit plugins within a pattern grid. Arrange patterns into songs, shape sounds with commands, and utilize touch, keyboard, or MIDI input. Includes built-in sounds and a demo to get started.
- Pattern grid for music creation
- Integrated samplers and synthesizers
- Audio Unit (AUv3) plugin hosting
- Advanced step sequencing with commands
- Song arrangement and structure
- Multiple input methods (touch, keyboard, MIDI)
- Export mixes and individual stems
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Tracker Pro puts samples, synthesizers, Audio Unit plug-ins and MIDI gear in one pattern grid. Write drums, bass lines and chords, shape each step with commands, and arrange your patterns into a finished song. Use touch controls, hardware-keyboard shortcuts or MIDI note input. On Mac, the same workspace also supports a keyboard and pointer. Built-in sounds and the STARTER 148 demo let you begin without extra equipment or downloads. TRACKER • Up to 16 tracks and patterns up to 128 rows, with independent track lengths for polymeter • Up to 8 FX slots per step for retriggers, chance, glide, sample start, slices and more • Chords of up to 6 notes, note tables, swing and grooves • 8 macros and 12 automation lanes per track • Song arrangement with sections, repeats and live row cueing • Piano roll editing, undo, copy and paste SAMPLER • Keep a whole kit in one Sampler: load files or a folder and choose the sample for each note • Random sample and slice selection for patterns that change as they play • Slice by transient, beat grid or hand, with up to 48 slices • Modern, Amiga, M3000 and SP12 playback modes, with editable bit depth, sample rate and interpolation • Stretch loops to fit bars, reverse playback and build crossfaded loops • Morphing filters with envelope, LFO, velocity and note modulation • Record the microphone, an audio interface, a track, a return bus or the master • Import audio files or extract sound from a video • Sample Crate: collect sounds from the web, your files and videos SYNTHESIZERS • Macro: 24 engines for basses, chords, percussion and evolving tones • VintagePoly: two-oscillator polyphonic synthesis with programmable modulation • VintagePD: phase-distortion synthesis with detailed multi-stage envelopes • VintageSub: subtractive synthesis with oscillator mixing, filter drive and modulation • Resonator: modal and string physical models • GrainOSC: pitched grain textures from built-in wavetable banks EFFECTS AND MIXING • EQP1 program EQ, Saturation, Tape and Vinyl for tone, drive and texture • Gate/Exp and Transient Designer for dynamics and attack • Granular FX, Ambient Reverb, Space, Delay, Lofi, Compressor and more • Put effects on tracks, two return buses and the master • Save presets and automate the controls PLUG-INS AND MIDI • Host compatible Audio Unit instruments and effects; presets and plug-in state save with the project • MIDI Out with notes, chords, bank and program changes, and 16 control lanes • MIDI input over USB, Bluetooth and virtual ports FINISH AND SHARE • Bounce a track’s current pattern and effects into a new Sampler instrument • Export WAV mixes and individual track stems • Self-contained projects with autosave and crash recovery • Transfer projects between iPhone, iPad and Mac; third-party plug-ins must be available on the destination device GOOD TO KNOW • iPhone, including iPhone Duo, and iPad: iOS/iPadOS 17 or later • One purchase covers iPhone, iPad and Mac • The compatible iPad app also runs on Apple Vision Pro • No account, subscription, ads or in-app purchases Documentation and tutorials: https://www.dubspot.com/tracker-pro/guide Support: https://www.dubspot.com/tracker-pro/support Includes open-source Plaits, Rings and Beads DSP by Emilie Gillet under the MIT License. Mutable Instruments is not affiliated with Dubspot.
Screenshots
Verdict
The clearest difference is in-app purchases: Tracker Pro at none against RUN4's 1. Tracker Pro also leads on price ($14.99 vs $17.99) and chart position (#140 vs unranked). RUN4's advantage is update cadence (daily vs weekly) and ratings volume (5 vs 1). 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 $17.99 and Tracker Pro $14.99 up front. RUN4 sells 1 one-off in-app purchase. Tracker Pro 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 Tracker Pro. That said, the two scores are not equally well evidenced: RUN4 has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
RUN4 ships an update daily, Tracker Pro weekly. Both last shipped on November 13, 2026.
| Parameter | RUN4 | Tracker Pro |
|---|---|---|
| Price | $17.99 | $14.99 — better |
| Rating | 5.0 (5 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 5 — better | 1 |
| Update frequency | Daily — better | Weekly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Paid |
| Best chart rank | — | #140 — better |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 248 MB | 47 MB |
| Age rating | 4+ | 17+ |
| Developer | Eugen Schott | Dubspot |
Customer experience
RUN4
Tracker Pro
In-app purchases
RUN4
- TÓLF 12-Track Sequencer$3.99
Tracker Pro
No in-app purchases








