Comparison

Grainsmith Field vs SignatureDYN

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Currently charting
Read 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.

About

SignatureDYN

Features
Read full description

SignatureDYN - Compressor / Gate / Limiter SignatureDYN is a professional 3-in-1 dynamics processor for iPhone and iPad. It combines a peak compressor, a smooth noise gate, and a brick-wall limiter in a single AUv3 plugin - covering the complete dynamics processing chain in one insert slot. Compressor Hard-knee peak compressor with independent attack and release. Threshold from −60 to 0 dB, ratio from 1:1 to 20:1. Transparent at low ratios, aggressive at high ratios. Gate Exponential noise gate with smooth closing - 3× slower than opening to avoid clicks and unnatural cutoffs. A dedicated LED indicator lights when the gate is active, making threshold setting precise and visual. Limiter Brick-wall output limiter with fixed 0.1 ms attack. No signal exceeds the set ceiling. Release follows the compressor release time. Default ceiling −0.3 dB — transparent protection always on. Metering Real-time Input VU meter and Gain Reduction meter with dB scale. Signal presence LED. Features AUv3 Audio Unit Extension - loads in AU EngineCore and any AUv3 compatible host Zero latency Full parameter automation Responsive UI - iPhone and iPad, portrait and landscape 7 automatable parameters: Threshold, Ratio, Attack, Release, Makeup Gain, Gate, Limiter #nobodysbanda

Screenshots

Grainsmith Field3 screens
SignatureDYN2 screens

Verdict

The call

The clearest difference is price: SignatureDYN at $5.99 against Grainsmith Field's $11.99. Grainsmith Field's advantage is update cadence (every 3 days vs every 2 weeks) and chart position (#175 vs unranked). On ads, in-app purchases, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Grainsmith Field costs $11.99 and SignatureDYN $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Grainsmith Field ships an update every 3 days, SignatureDYN every 2 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 8 level
Grainsmith Field versus SignatureDYN: the parameters behind the verdict, then further details
ParameterGrainsmith FieldSignatureDYN
Price$11.99$5.99 — better
Rating5.0 (5 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 3 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
Best chart rank#175 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size81 MB8 MB
Age rating4+4+
DeveloperPlastic Factory LLCAntonio Sorin TASU

In-app purchases

None

Grainsmith Field

No in-app purchases

None

SignatureDYN

No in-app purchases

Questions

Is Grainsmith Field free?
Grainsmith Field costs $11.99, with no in-app purchases.
Is SignatureDYN free?
SignatureDYN costs $5.99, with no in-app purchases.
Do Grainsmith Field or SignatureDYN have ads?
Neither Grainsmith Field nor SignatureDYN shows ads.
Which is updated more often, Grainsmith Field or SignatureDYN?
Grainsmith Field ships an update every 3 days, and SignatureDYN every 2 weeks. Most recently, Grainsmith Field was updated on November 5, 2026 and SignatureDYN on October 31, 2026.

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