AmenBreakChopper vs 055U4RY
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AmenBreakChopper
This music app synchronizes input audio with BPM-synced delay for beat chopping. It allows for 16-beat beat chopping quantized to eighth notes and supports external MIDI controllers for adjustments.
- BPM-synced delay
- Beat chopping
- 16-beat quantization
- Eighth note quantization
- External MIDI controller support
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AmenBreakChopperは、入力された音声をBPMに同期したディレイで再生するビートチョッパー・エフェクトです。 BPM同期を取り、8分音符でクオンタイズされた状態で16拍分の長さでのビートチョップを行えます。 外部MIDIコントローラでビートチョップや位置の修正を行うことができます。
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.
- 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)
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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.
Screenshots
Verdict
The clearest difference is review sentiment: 055U4RY at 100% against AmenBreakChopper's 67%. 055U4RY also leads on rating (5.0 vs 4.5) and update cadence (every 6 days vs every 5 weeks). AmenBreakChopper's advantage is price ($0.99 vs $6.99) and iOS requirement (12.0 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
AmenBreakChopper costs $0.99 and 055U4RY $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
055U4RY holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: 055U4RY has 29 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 67% of AmenBreakChopper's written reviews are positive against 100% of 055U4RY's.
AmenBreakChopper ships an update every 5 weeks, 055U4RY every 6 days. Both last shipped on November 5, 2026.
| Parameter | AmenBreakChopper | 055U4RY |
|---|---|---|
| Price | $0.99 — better | $6.99 |
| Rating | 4.5 (2 ratings) | 5.0 (29 ratings) — better |
| Positive reviews | 66.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 | 29 — better |
| Update frequency | Every 5 weeks | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 14 MB | 2 MB |
| Age rating | 4+ | 9+ |
| Developer | Keisuke Kagoshima | LASZLO DOBROVOLSZKI |
Customer experience
AmenBreakChopper
055U4RY
In-app purchases
AmenBreakChopper
No in-app purchases
055U4RY
No in-app purchases









