Comparison

MIDISpy vs Replicant 3

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

Head to head
About

MIDISpy

This utility helps monitor MIDI connections across various platforms. It offers basic filtering for different MIDI message types and supports multiple connectivity options.

Highlights
  • Standalone and AUv3 support
  • Basic message filtering
  • Inter-App MIDI
  • USB MIDI
  • Bluetooth MIDI
  • Network MIDI
Features
Read full description

MIDISpy - MIDI Monitor A handy little utility for monitoring MIDI connectivity. Overview: - Standalone and AUv3 support - Basic Filters for Note, Control Change, Clock and SysEx messages Connectivity: - Inter-App MIDI - USB MIDI - Bluetooth MIDI - Network MIDI - AUv3 Requirements: - iOS9+

About

Replicant 3

This real-time audio effect processor captures, loops, and mangles audio on the fly. It offers advanced sequencing with per-step probability and direction, alongside four distinct slice effects for creative sound design. Control dynamics with envelope crossfading and trigger slices manually or via MIDI.

Highlights
  • Real-time audio slicing and mangling
  • Advanced step sequencer (3-16 steps)
  • Four distinct slice effects (Stutter, Delay, Redukt, Ring Mod)
  • Envelope crossfading for dynamic control
  • Manual and MIDI triggering
  • Intuitive visual step sequencer interface
  • AUv3 compatible
Read full description

Replicant 3 is a real-time audio slicing and mangling effect, the third generation of the plugin that started the genre in 2007. Feed it any audio and Replicant's sequencer captures, loops, reverses, and re-slices it on the fly, layering in delay, filtering, panning, ring modulation, and bit-crushing to turn predictable tracks into something unpredictable. Version 3 is a ground-up rebuild with an all-new sequencer engine, expanded effects, and a redesigned interface that makes programming complex slice patterns fast and intuitive. SEQUENCER ENGINE Program 3 to 16 steps per measure with multiple step-size modes, from dotted notes through nontuplets. Build rhythmic patterns that go well beyond straight time. Per-step probability, direction (forward or reverse), and effect routing let you create patterns that evolve and surprise. FOUR SLICE EFFECTS The original Stutter capture-and-repeat is joined by three new modes. Delay adds rhythmic echoes to sliced audio. Redukt applies bit-crushing and sample-rate reduction for lo-fi destruction. Ring Mod adds metallic, inharmonic tonal coloring to any slice event. ENVELOPE CROSSFADING Smooth transitions or hard-gated rhythmic chops on every slice event. Control the attack and release shape of each captured buffer for precise dynamic control. MANUAL AND MIDI TRIGGER Bypass the sequencer entirely and fire slices on demand. Manual trigger mode works with touchscreens for live performance. MIDI trigger lets you drive Replicant from a controller, keyboard, or DAW automation. REDESIGNED INTERFACE A visual step sequencer puts your entire pattern on screen at once. Edit steps, assign effects, set probabilities, and adjust parameters without menu-diving. CROSS-PLATFORM PRESETS XML-based preset manager with presets compatible across all Audio Damage plugin formats and operating systems. SOUND DESIGN IDEAS Sequence stuttering vocal chops with per-step filter sweeps. Build glitched-out drum fills by randomizing slice direction and bit-crushing depth. Layer ring modulation on sustained pads for metallic, evolving textures. Use MIDI trigger mode to fire slices manually in a live set. Program polyrhythmic slice patterns with odd step counts against 4/4 time. Run full mixes through Replicant on a bus for controlled chaos breakdowns. AUv3 compatible. Runs standalone or hosted in AUM, ApeMatrix, Audiobus, Cubasis, GarageBand, and other AUv3 hosts on iOS 11 or newer. From Audio Damage, making creative software for discerning musicians since 2002.

Verdict

The call

The clearest difference is price: MIDISpy at Free against Replicant 3's $4.99. MIDISpy also leads on update cadence (every 3 weeks vs every 18 months). On review sentiment, ads, in-app purchases 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

MIDISpy is free to download; Replicant 3 costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

MIDISpy ships an update every 3 weeks, Replicant 3 every 18 months. The most recent releases landed on September 30, 2026 and September 25, 2026 respectively.

Scorecard3 real differences · 7 level
MIDISpy versus Replicant 3: the parameters behind the verdict, then further details
ParameterMIDISpyReplicant 3
PriceFree — better$4.99
Rating4.0 (4 ratings) — better—
Positive reviews71.4% of reviews — better66.7% of reviews
Number of ratings4 — better—
Update frequencyEvery 3 weeks — betterEvery 18 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPadiPad
Requires iOS11.0 — better12.0
Further details — not scored
Size6 MB27 MB
Age rating4+4+
DeveloperKai ArasAudio Damage, Inc.

Customer experience

MIDISpy

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews7 reviews
Positive71.4%
Neutral14.3%
Negative14.3%

Replicant 3

Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

MIDISpy

No in-app purchases

None

Replicant 3

No in-app purchases

Questions

Is MIDISpy free?
MIDISpy is free to download, with no in-app purchases.
Is Replicant 3 free?
Replicant 3 costs $4.99, with no in-app purchases.
Do MIDISpy or Replicant 3 have ads?
Neither MIDISpy nor Replicant 3 shows ads.
Which is updated more often, MIDISpy or Replicant 3?
MIDISpy ships an update every 3 weeks, and Replicant 3 every 18 months. Most recently, MIDISpy was updated on September 30, 2026 and Replicant 3 on September 25, 2026.

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