Grainsmith Field vs TwinPath
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Grainsmith Field
Transform any sound into unique sonic textures using a powerful granular synthesizer. Manipulate audio with multiple playheads, record live input, and play it like an instrument via MIDI. Optimized for mobile, it offers extensive control and export options.
- Granular synthesis engine
- Multiple independent playheads
- Live audio recording and manipulation
- MIDI instrument mode
- AUv3 music effect
- Performance recording with Live Activity
- Built-in reverb and filter
Read full descriptionHide full description
Grainsmith Field is a granular instrument for iPad and iPhone. Load a sound or record one live, then pull it apart into grains. Stretch and scatter it until it stops sounding like the source, or pitch it and play it like an instrument. It shares its granular engine with our desktop Grainsmith plugin, but it's rebuilt for touch. Field is a single multitouch screen: four XY pads control paired parameters (Density and Size, Jitter and Spread, Pitch and Reverse, Cutoff and Resonance), and a Morph control sweeps several at once. THREE PLAYHEADS Run up to three independent grain streams from one sample at the same time. Each head has its own position, speed, pitch, level, pan, grain size, and spread. Grab a playhead line on the waveform to move it independently, or move them as a group. Double-tap to gather them. Set a second head a fifth or an octave away and the streams blend into a single granular texture. MODULATION Six modulation slots drive the controls: LFOs and Euclidean patterns with per-route depth, assigned by long-pressing a knob. The MOVE dial sets the Morph macro itself in motion, and each destination drifts on its own phase. Rates sync to tempo, in the app or from the host clock. RECORD AND MANGLE Capture audio from your hardware input and granulate it as it comes in, or loop a phrase and let the engine chew on it. Scrub the waveform directly. Freeze the grain cloud to hold a sound for as long as you want. Run the stereo delay to smear the grain tails into echoes; it syncs to tempo too. Export captures as WAV to the Files app. RECORD YOUR PERFORMANCE Start a recording from the presets menu and everything you play is captured to a WAV file. Keep playing through app switches and screen locks; a Lock Screen Live Activity shows while recording runs. Recordings save to the Files app and share straight from Field. PLAY IT AS AN INSTRUMENT Switch to Instrument mode and play the grain engine from a MIDI keyboard: four-voice polyphony, an attack/release envelope, and a root-note control. The pitch ribbon snaps to musical intervals: Free, Chromatic, Scale, Octaves, or Oct+5ths, with twelve scale options and a probability control. Works with hardware MIDI in the standalone app and with host MIDI in AUv3. USE IT IN YOUR HOST The AUv3 music effect loads in AUM, Logic for iPad, and other AUv3 hosts. Parameters are exposed for host automation and MIDI learn. Your patch saves and restores with the session, including head count, every per-head control, the modulation slots, and pitch snap mode. ALSO IN THE BOX - Ten factory presets grouped by character, with a browser and a Favorites section for your own - Background audio: the standalone keeps playing when you switch apps - Reverb, stereo delay with tempo sync, filter, grain-shape windows, pitch randomization - Runs on iPhone with a compact layout No account and no subscription. Field collects no data.
TwinPath
This app allows for parallel audio effects processing using your existing Audio Units. It simplifies complex signal routing, offering a compact interface for blending or switching between effect chains. Ideal for musicians looking to enhance their audio production workflows.
- Parallel effects processing
- Simplified signal routing
- Cross-fade between effect chains
- Dual mono operation (L/R, Mid/Side)
- Switchable pre/post operation
- Compact control interface
Read full descriptionHide full description
TwinPath enables parallel effects processing using your existing Audio Units, without configuring busses or complex routings. It hides the details of managing multiple signal paths, and offers a compact, quickly accessible control interface. The result is a consistent setup you can easily recreate in any DAW, regardless of how each host handles audio routing. Among its possible applications, TwinPath pairs especially well with delay effects for dynamic performances. Shifting focus from deep editing to switching between (or blending) entire modules opens up a new perspective and new features – especially when feedback delays are involved. And of course, both approaches can be applied at the same time. Once inserted into a track’s effects chain, TwinPath handles splitting and merging audio streams and provides several convenience features. It offers two main classes of operation: CROSS-FADE • Blend between two effects chains using a single control • Switchable pre/post operation: pre mode preserves effect tails and lets feedback effects "breathe", while post mode offers instant, direct control DUAL MONO • Run different effects chains for Left/Right, Mid/Side, or a continuous blend between them • Channel mapping and FX bias are smooth, performance-friendly controls • Quick and efficient workflow replacement that overcomes functional limits of stock dual mono modes, such as restrictions on independent preset loading PLEASE NOTE: • An AUv3-compatible host is required to use this app
Screenshots
Verdict
The clearest difference is price: TwinPath at $6.99 against Grainsmith Field's $11.99. TwinPath also leads on iOS requirement (14.0 vs 16.0). On rating, review sentiment, ratings volume and ads 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
Grainsmith Field costs $11.99 and TwinPath $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Grainsmith Field against 5.0 for TwinPath. Both are backed by a comparable volume of ratings — 5 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
| Parameter | Grainsmith Field | TwinPath |
|---|---|---|
| Price | $11.99 | $6.99 — better |
| Rating | 5.0 (5 ratings) | 5.0 (4 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 5 — better | 4 |
| Update frequency | Every 2 days | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 81 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Plastic Factory LLC | quantovox |
Customer experience
Grainsmith Field
TwinPath
In-app purchases
Grainsmith Field
No in-app purchases
TwinPath
No in-app purchases







