tapeworm vs GrainHeads
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
tapeworm
This music app offers a unique tape delay effect with a "wiggly, dirty" sound. Control delay time by stretching or flicking a virtual tapeworm, with options for manual or random adjustments. It includes analog-modeled saturation, compression, and amplifier stages for a rich audio experience.
- Interactive tape delay time control
- Manual and free modes for delay
- Analog-modeled tape saturation and compression
- Overdrivable feedback
- AUv3 plugin compatibility
- Performative sound design elements
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Tapeworm is a tape echo with a unique method of changing the delay time, and a wiggly, dirty sound. You can set the delay time manually by stretching the worm. The record button will flash to show the current interval. You can exit the fixed time mode and enter free mode by toggling. This lets the delay time change randomly, which you can encourage by flicking the tapeworm around. Double tap to reset, adding a fun performative element to your sound. Feedback can be overdriven. An analog-modeled tape saturation and compression, and amplifier and limiter stage, keep it sounding juicy when it gets loud. Tapeworm is audio unit (AUv3) compatible, meaning you can use it as a plugin in your app of choice like AUM, GarageBand or Logic. We hope you enjoy using tapeworm for music, or just for fun.
GrainHeads
Transform any sound into unique textures and evolving sonic landscapes. This granular synthesizer offers deep control over individual sound grains, complex modulation, and a powerful step sequencer for experimental music creation.
- Multi-source granular engine
- Shape individual grains with envelopes
- Summing modulation matrix
- Step sequencer with parameter lanes
- Macros for expressive control
- Re-routable effects chain
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GrainHeads is a granular synthesizer that turns any sound into something entirely new. Built for sound designers, musicians, and experimental producers who want deep, hands-on control over texture and motion. Multi-source granular engine Load material into four sample slots and deploy independent playheads — each targeting its own source. Blend, crossfade, or dynamically switch between samples using modulation. The result: rich, multi-layered textures that evolve continuously without repetition. Shape every grain Each playhead carries a full set of granular parameters — position, scan speed, grain size, pitch, chance — plus a drawable grain envelope. Sculpt transient character using splinter or Bézier curves for anything from soft clouds to sharp, percussive fragments. Modulate everything, from everywhere A summing modulation matrix lets multiple sources target the same parameter simultaneously. Assign LFOs, envelopes, and sequencer lanes to virtually any control — including sample slot selection, filter cutoff, and even other LFOs. Filter envelopes add per-step timbral motion in Sequencer mode. Sequencer with parameter lanes Go beyond note patterns. The step sequencer locks any parameter per step — pitch, position, filter, grain size — with polyrhythmic lengths and clock divisions. Each playhead runs its own sequence independently. Macros for expressive control Four macro axes map multiple parameters to simple X/Y gestures — Time Smear, Spatial Bloom, Degradation, Complexity. Combined with the 4-finger 2D touch pad controlling up to 8 parameters, GrainHeads becomes a performance instrument. Effects that reshape the signal A re-routable effects chain includes delay, reverb, lo-fi degradation, and filtering — with adjustable signal flow so effects interact in the order you choose. Key Features • AUv3 instrument and effect plugins — use standalone or inside your DAW • Up to 8 independent granular playheads • 4 sample slots with per-playhead source selection • Drawable grain envelope (splinter / Bézier curves) • Summing modulation matrix — multiple LFOs, envelopes, and sequencer lanes per target • LFO-on-LFO modulation for deeply nested movement • Step sequencer with parameter locking and polyrhythmic clock divisions • Filter envelope per step (Sequencer mode) • Per-playhead dual Moog-style ladder filter (self-oscillating, with overdrive) with link and mirror modes • 4 macro axes (X/Y pads) for multi-parameter gestures • Re-routable effects section (delay, reverb, lo-fi, noise, limiter) • Scale quantization — chromatic, major, minor, and exotic modes • Dice — one-tap randomization for instant inspiration • Ableton Link • Import/export presets • Customizable look and feel PRO version unlocks loading external samples and microphone recording. GrainHeads turns granular synthesis into a hands-on instrument — not a menu-diving exercise.
Screenshots
Verdict
The clearest difference is rating: GrainHeads at 4.7 against tapeworm's 4.1. GrainHeads also leads on update cadence (every 5 days vs every 3 weeks). tapeworm's advantage is in-app purchases (none vs 10). On price, ratings volume, 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
Both are free to download. GrainHeads sells 10 one-off in-app purchases. tapeworm asks for nothing beyond the download.
GrainHeads holds the better App Store score, 4.7 against 4.1. Both are backed by a comparable volume of ratings — 13 and 14 respectively.
tapeworm ships an update every 3 weeks, GrainHeads every 5 days. Both last shipped on October 25, 2026.
| Parameter | tapeworm | GrainHeads |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (13 ratings) | 4.7 (14 ratings) — better |
| Positive reviews | 62.5% of reviews | — |
| Number of ratings | 13 | 14 — better |
| Update frequency | Every 3 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 17.6 |
| Further details — not scored | ||
| Size | 8 MB | 106 MB |
| Age rating | 4+ | 4+ |
| Developer | Radii Research | Andrei Nevar |
Customer experience
tapeworm
GrainHeads
In-app purchases
tapeworm
No in-app purchases
GrainHeads
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