# MIDISpy vs Replicant 3

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.

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.

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.

## The numbers

| Metric | MIDISpy | Replicant 3 |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/midispy/id1444652196/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | **71.4% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 18 months |
| Monetization | **Free** | Paid |
| Size | 6 MB | 27 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kai Aras](https://appshunter.io/developer/370820899) | [Audio Damage, Inc.](https://appshunter.io/developer/1248448317) |

## What reviewers say

### MIDISpy

[App page](https://appshunter.io/ios/app/midispy/id1444652196)

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:** macOS Compatibility

**In-app purchases:** none


### Replicant 3

[App page](https://appshunter.io/ios/app/replicant-3/id1670715321)

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

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*