Comparison

055U4RY vs FIELD KIT Playback Engine

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

Head to head
About

055U4RY

This app is a unique polyphonic synthesizer designed to evoke horror-themed soundscapes. It features a distinctive visual interface resembling a haunted DOS terminal with a skull motif, offering a variety of synthesis engines and effects for creating unsettling audio.

Highlights
  • 8-voice polyphonic synthesizer
  • 15 synthesis engines
  • Twin chaotic LFOs
  • Shepard-Risset layer
  • State-variable filter
  • Sample-rate reducer and bit-depth crusher
  • Real-time stutter buffer (GLTCH)
Features
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055U4RY (say it: "ossuary") is an 8-voice polyphonic synthesizer sealed inside a haunted DOS terminal — and, since 1.30, a second plug-in that turns the same machine loose on any audio you feed it. A photographic ASCII skull is the front panel: its jaw hinges open with the amplitude envelope, its eye sockets ignite with the output level, and the whole interface tears, melts and reassembles itself while you play. THE VOICE - 15 synthesis engines: detuned saw/square/triangle unison stacks, sine and sub-oscillators one and two octaves down, two-operator FM, ring modulation and inharmonic partials. Every factory preset is a different engine. - Twin chaotic LFOs that cross-modulate each other's RATE, so pitch and filter drift never repeats. Held notes stay alive and slightly wrong. - A Shepard-Risset layer tuned beneath every note: five windowed partials in an endless downward glissando - the bottomless-pit illusion of classic horror scoring, fused into the oscillator core. - A 19 Hz infrasonic tremolo at the edge of perception. On headphones it is a shiver; on a big system it is pressure. THE CHAIN - State-variable filter, low-pass or band-pass per engine, with resonance that will scream - Sample-rate reducer and bit-depth crusher for terminal-grade lo-fi - Saturating drive stage - GLTCH: a real-time stutter buffer that seizes and re-loops your signal - CRYPT: a damped, pitch-black comb/allpass reverb - GLIDE: exponential portamento up to 1.5 seconds - DOOM: one macro that leans the chaos, the descent and the tremor deeper into the signal PERFORM - 14 knobs, all ASCII, every one audible on every preset - 15 factory presets with per-preset patch memory: your tweaks persist for each preset, and [RESET] restores the factory sound - Two-octave on-screen keyboard with octave transpose and note names - Hardware MIDI in (all sources auto-connect), built-in Bluetooth MIDI pairing, pitch bend, MIDI 2.0 aware - The skull is your meter: jaw = envelope, eyes = level, decay = how hard you push GLTCH 055U4RY FX - THE EFFECT The same app installs a second, separate plug-in. Put it on a drum loop, a guitar, a vocal or a whole mix and run it through the machine: - The full destruction chain as an insert - drive, bit crusher, sample-rate reducer, stutter, filter and the CRYPT reverb - in true stereo - HAUNT: a cross-fed delay whose repeats rot as they decay, with MURK controlling how fast they turn to mud - SYNC: stutters and echoes locked to your host's tempo, 1/16 through 1/1, or free-running - DOOM as an injector: the endless Risset descent and the 19 Hz tremor printed underneath your audio, so anything you feed it gains a bottomless falling drone that was never in the source - Fifteen presets sharing the instrument's names, each a different topology - Wet/dry MIX, output trim, and a skull that reacts to whatever passes through AUv3 + STANDALONE The synth runs standalone with zero setup. Both plug-ins install into your host: AUM, Logic Pro, GarageBand, apeMatrix, WBTRK and any AUv3-compatible DAW, with full parameter automation - "hejluxom: 055U4RY" under instruments, "hejluxom: 055U4RY FX" under effects. One purchase, every platform: iPhone, iPad and Mac. No accounts, no ads, no data collected - your patches never leave the device.

About

FIELD KIT Playback Engine

Transform audio recordings into evolving textures, rhythms, and atmospheres. Create up to four independent playback windows with customizable speed, direction, and effects. Explore new sonic material from your recordings.

Highlights
  • Up to four independent playback windows
  • Variable playback speed and direction
  • Drive and filtering per window
  • Routable modulation sources
  • Save and recall .fieldkit files
  • Standalone app and AUv3 Audio Unit
Currently charting
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FIELD KIT is an audio playback instrument built for turning recorded sound into evolving texture, rhythm, and atmosphere. Load an audio file and create up to four independent playback windows across the recording. Each window can move through a different section of the source with its own playback speed, direction, crossfade, drive, filtering, level, and pan. Use FIELD KIT to pull overlapping textures from long field recordings, transform environmental sound into ambient beds, create asynchronous loops, or find entirely new material hidden inside a recording. Three modulation sources can be routed independently across the playback windows, allowing parameters to drift, pulse, and evolve over time. Features include: - Up to four independent playback windows - Forward, reverse, and ping-pong playback - Variable playback speed - Adjustable loop crossfade - Drive and filtering per window - Independent level and pan controls - Three routable modulation sources - SPLICE for working with multiple audio sources - Save and recall .fieldkit files to share across platforms - Internal recording in Standalone mode - Standalone app and AUv3 Audio Unit - Host transport support in compatible AUv3 hosts FIELD KIT was designed around a simple idea: a recording doesn't have to be played from beginning to end. It can be a place to explore.

Screenshots

055U4RY3 screens
FIELD KIT Playback Engine4 screens

Verdict

The call

The clearest difference is rating: 055U4RY at 4.9 against FIELD KIT Playback Engine's 4.5. 055U4RY also leads on review sentiment (100% vs 80%) and price ($6.99 vs $9.99). FIELD KIT Playback Engine's advantage is chart position (#64 vs unranked) and iOS requirement (15.0 vs 17.0). On ads, in-app purchases, monetization model and device support 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

055U4RY costs $6.99 and FIELD KIT Playback Engine $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

055U4RY holds the better App Store score, 4.9 against 4.5. Both are backed by a comparable volume of ratings — 13 and 4 respectively. Written reviews point the same way: 100% of 055U4RY's written reviews are positive against 80% of FIELD KIT Playback Engine's.

UpkeepUpdate frequency

055U4RY ships an update every 5 days, FIELD KIT Playback Engine every 2 weeks. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.

Scorecard7 real differences · 4 level
055U4RY versus FIELD KIT Playback Engine: the parameters behind the verdict, then further details
Parameter055U4RYFIELD KIT Playback Engine
Price$6.99 — better$9.99
Rating4.9 (13 ratings) — better4.5 (4 ratings)
Positive reviews100.0% of reviews — better80.0% of reviews
Number of ratings13 — better4
Update frequencyEvery 5 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank—#64 — better
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS17.015.0 — better
Further details — not scored
Size2 MB12 MB
Age rating9+4+
DeveloperLASZLO DOBROVOLSZKIField Tone Audio, LLC

Customer experience

055U4RY

All ratings13 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews8 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

FIELD KIT Playback Engine

All ratings4 ratings
Positive75.0%
Neutral25.0%
Negative0.0%
Written reviews5 reviews
Positive80.0%
Neutral20.0%
Negative0.0%

In-app purchases

None

055U4RY

No in-app purchases

None

FIELD KIT Playback Engine

No in-app purchases

Questions

Is 055U4RY free?
055U4RY costs $6.99, with no in-app purchases.
Is FIELD KIT Playback Engine free?
FIELD KIT Playback Engine costs $9.99, with no in-app purchases.
Which has better reviews, 055U4RY or FIELD KIT Playback Engine?
055U4RY is rated higher. 055U4RY averages 4.9 out of 5 from 13 ratings, while FIELD KIT Playback Engine averages 4.5 from 4 ratings.
Do 055U4RY or FIELD KIT Playback Engine have ads?
Neither 055U4RY nor FIELD KIT Playback Engine shows ads.
Which is updated more often, 055U4RY or FIELD KIT Playback Engine?
055U4RY ships an update every 5 days, and FIELD KIT Playback Engine every 2 weeks. Most recently, 055U4RY was updated on October 14, 2026 and FIELD KIT Playback Engine on October 5, 2026.

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