Comparison

Grainsmith Field vs VU950

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
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

VU950

This app emulates the behavior of early digital samplers, focusing on sound shaping through intentional limitations and artifacts. It offers a full timestretch workflow, reduced bit depth processing, and MIDI control for a hands-on experience. Standalone mode includes multi-track sequencing, effects, and the ability to host other AUv3 apps.

Highlights
  • Classic sampler sound emulation
  • Full timestretch workflow
  • Reduced bit depth processing
  • MIDI-controllable parameters
  • Multi-track sequencing
  • AUv3 hosting
  • Built-in effects
Features
Read full description

VU950 is not about realism. It is about behavior. Sound shaped by limits, gain interaction and audible artifacts — the same forces that defined early digital samplers. Draws inspiration from classic midi sequencers combined with samplers. Why it sounds the way it does Instead of emulating a single piece of hardware, VU950 recreates the way early samplers behaved internally. Resolution limits, imperfect filtering and non-linear stages are treated as musical decisions, not technical flaws. What shapes the sound VU950 sample rate: 7.5 kHz to 48 kHz Full timestretch workflow with classic hardware sampler tone Reduced bit depth processing for early-digital density User-adjustable anti-aliasing behavior Stereo signal path with selectable left or right input channel Dedicated input gain stage with drive and circuit bias Multiple filtering stages including bandwidth limitation Built-in low-pass filter for tone shaping Anti-aliasing tuned for musical artifacts, not transparency Non-linear processing across the entire signal path Output gain stage that affects tone and density, not just level MIDI-controllable parameters for hands-on workflow Maximum sample length: 63 seconds Truncate option to trim sample Precise mode for precise trimming on start and end screen One or eight voices of polyphony Precise start and end point control for trimming Chop function with selectable amount of slices And that was just VU950 AUv3 plugin. In Standalone: 8 tracks Support for hosting AUv3 apps to change VU950 sound engine to any sound You like. Build in multi sampler - VU20. Build in midi device - VUMIDI. Mixer with 4 inserts per track. 17 build in effects like filters, eq, compressors Possibility to use 4 AUv3 effects per channel Step Sequencer Piano Roll. Song Mode Live Mode Export wav with stems. Loading samples to build in turntable and record samples to VU950/VU20 or another AUv3 plugin with inputs Classic and modern UI template (Modern is fully customisable) In app purchases drumkits are downloadable after purchase (MPC60 drumkit for free) You can check also my another beatmaking app - VU202 - which is free and it is also a AUv3 instrument so You can use VU202 in VU950!

Screenshots

Grainsmith Field3 screens
VU9504 screens

Verdict

The call

The clearest difference is price: VU950 at $1.99 against Grainsmith Field's $11.99. Grainsmith Field's advantage is review sentiment (100% vs 60%) and rating (5.0 vs 4.5). On ratings volume, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Grainsmith Field costs $11.99 and VU950 $1.99 up front. VU950 sells 8 one-off in-app purchases. Grainsmith Field asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Grainsmith Field holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 5 and 10 respectively. Written reviews point the same way: 100% of Grainsmith Field's written reviews are positive against 60% of VU950's.

UpkeepUpdate frequency

Grainsmith Field ships an update every 3 days, VU950 every 2 days. Both last shipped on October 15, 2026.

Scorecard4 real differences · 6 level
Grainsmith Field versus VU950: the parameters behind the verdict, then further details
ParameterGrainsmith FieldVU950
Price$11.99$1.99 — better
Rating5.0 (5 ratings) — better4.5 (10 ratings)
Positive reviews100.0% of reviews — better60.0% of reviews
Number of ratings510 — better
Update frequencyEvery 3 daysEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size81 MB189 MB
Age rating4+4+
DeveloperPlastic Factory LLCDariusz Chynek

Customer experience

Grainsmith Field

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

VU950

All ratings10 ratings
Positive80.0%
Neutral10.0%
Negative10.0%
Written reviews10 reviews
Positive60.0%
Neutral20.0%
Negative20.0%

In-app purchases

None

Grainsmith Field

No in-app purchases

8 purchases

VU950

One-time8
  • EMAX drumkit$0.99
  • S2400$0.99
  • MPC2000$0.99
Show 5 more
  • MPC2000 2$0.99
  • MPC3000$0.99
  • SP1200$0.99
  • S900$0.99
  • SP202$0.99

Questions

Is Grainsmith Field free?
Grainsmith Field costs $11.99, with no in-app purchases.
Is VU950 free?
VU950 costs $1.99, and also offers in-app purchases.
Which has better reviews, Grainsmith Field or VU950?
Grainsmith Field is rated higher. Grainsmith Field averages 5.0 out of 5 from 5 ratings, while VU950 averages 4.5 from 10 ratings.
Do Grainsmith Field or VU950 have ads?
Neither Grainsmith Field nor VU950 shows ads.
Which is updated more often, Grainsmith Field or VU950?
Grainsmith Field ships an update every 3 days, and VU950 every 2 days. Most recently, Grainsmith Field was updated on October 15, 2026 and VU950 on October 15, 2026.

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