Comparison

MIDIx vs Grainsmith Field

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

Head to head
About

MIDIx

This app uses physics simulations to generate expressive MIDI data. Control parameters through object movement or create generative note sequences. It's a unique tool for musicians seeking organic and evolving soundscapes.

Highlights
  • Physics-driven MIDI CC generation
  • Generative MIDI note sequencing
  • AUv3 plugin support
  • Customizable physics scenes
  • Built-in scale library
  • Real-time modulation
  • Universal app for iOS and Mac
Features
Read full description

MIDIx brings a new dimension to MIDI control. Instead of programming sequences or drawing automation, you let physics do the work. Objects bounce, fall, orbit, and collide — and every movement becomes expressive MIDI data in real time. MIDIx is a universal app for iPhone, iPad and Mac, and supports AUv3 so you can use it as a plugin directly in your favorite host. Organic CC Controller The CC page gives you 8 independent physics scenes, each generating two MIDI CC values — X and Y — from the motion of a physical object, for up to 16 simultaneous CC streams. Each axis maps directly to its CC value, creating smooth, organic modulation that no LFO can replicate. Each output can be assigned to any MIDI CC parameter — or to a parameter of another scene, enabling complex modulation chains where one physics engine drives the behavior of another. Hit Freeze to instantly hold the current motion in place, perfect for locking in a value during a performance. Generative MIDI Sequencer The Notes page transforms physics into melody. Add as many objects as you want to the scene — each one bounces freely and triggers a MIDI note every time it hits the wall. Shape the motion with additional objects — Static, Bumper, Planet, and Repulsor — to create richer, more unpredictable interactions. Build evolving, generative patterns that shift organically over time. No two performances are ever the same. Define your harmonic space and select individual notes to craft any scale you need. Tap Scale Library to instantly load a preset scale: Major, Minor, Pentatonic, and many more. Features: • 8 physics scenes generating up to 16 MIDI CC streams (X and Y per scene) • Generative MIDI note sequencer with unlimited objects • Continuous or Trigger play mode, adjustable update frequency • Freeze button to instantly hold the current motion • Adjustable min/max range per scene to fine-tune CC output • Assign any CC or scene parameter as a modulation source • Static, Bumper, Planet, and Repulsor objects for richer motion • Built-in Scale Library with custom scale editing • Adjustable root note, base octave, octave count, and note duration • Notes custom mode (select the notes you want) • Preset import & export • Randomizer • Undo support • Built-in user guide • Background audio support • Full MIDI support & MIDI Mapping • Full AUv3 support — standalone or as a plugin in your favorite host • Universal app for iPhone, iPad, and Mac Questions or feedback? We'd love to hear from you: contact@fingerlab.net Stay tuned! The Fingerlab Team

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.

Screenshots

MIDIx4 screens
Grainsmith Field3 screens

Verdict

The call

The clearest difference is update cadence: Grainsmith Field at every 3 days against MIDIx's every 8 days. Grainsmith Field also leads on chart position (#175 vs unranked). MIDIx's advantage is price ($8.99 vs $11.99) and device support (4 vs 2). 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

CostPrice · In-app purchases · Ads · Monetization

MIDIx costs $8.99 and Grainsmith Field $11.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for MIDIx against 5.0 for Grainsmith Field. Both are backed by a comparable volume of ratings — 3 and 5 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

MIDIx ships an update every 8 days, Grainsmith Field every 3 days. Both last shipped on November 5, 2026.

Scorecard4 real differences · 7 level
MIDIx versus Grainsmith Field: the parameters behind the verdict, then further details
ParameterMIDIxGrainsmith Field
Price$8.99 — better$11.99
Rating5.0 (3 ratings)5.0 (5 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings35 — better
Update frequencyEvery 8 daysEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank—#175 — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS15.6 — better16.0
Further details — not scored
Size17 MB81 MB
Age rating4+4+
DeveloperFingerlabPlastic Factory LLC

Customer experience

MIDIx

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Grainsmith Field

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

MIDIx

No in-app purchases

None

Grainsmith Field

No in-app purchases

Questions

Is MIDIx free?
MIDIx costs $8.99, with no in-app purchases.
Is Grainsmith Field free?
Grainsmith Field costs $11.99, with no in-app purchases.
Which has better reviews, MIDIx or Grainsmith Field?
MIDIx and Grainsmith Field are both rated 5.0 out of 5 on the App Store, from 3 and 5 ratings respectively.
Do MIDIx or Grainsmith Field have ads?
Neither MIDIx nor Grainsmith Field shows ads.
Which is updated more often, MIDIx or Grainsmith Field?
MIDIx ships an update every 8 days, and Grainsmith Field every 3 days. Most recently, MIDIx was updated on November 5, 2026 and Grainsmith Field on November 5, 2026.

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