# MIDI vs Callback Freeverb

MIDI and Callback Freeverb are too close to call on the numbers: across 8 compared parameters — price, rating, ratings volume and ads among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for MIDI against 5.0 for Callback Freeverb. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

## The numbers

| Metric | MIDI | Callback Freeverb |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/midi-probe/id6756924036/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/callback-freeverb/id6775060495/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Monetization | Free | Free |
| Size | 5 MB | 7 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Michael Hitz](https://appshunter.io/developer/1716179774) | [Callback Audio, LLC](https://appshunter.io/developer/1896220942) |

## What reviewers say

### MIDI

[App page](https://appshunter.io/ios/app/midi-probe/id6756924036)

This app helps you discover, test, and troubleshoot MIDI devices like controllers and synths. It allows you to send specific MIDI commands and monitor incoming messages with timestamps for verification.

**Highlights:** Discover USB, Bluetooth, and RTP MIDI devices, Send specific MIDI commands (Notes, CC, System Common, Real-Time), Monitor inbound MIDI with live, timestamped log, Filter MIDI messages by command type, Verify pitch bend and high-resolution CCs, Test custom hardware and software MIDI implementations

**In-app purchases:** none


### Callback Freeverb

[App page](https://appshunter.io/ios/app/callback-freeverb/id6775060495)

This app offers a classic algorithmic reverb effect based on the Freeverb algorithm. It adds depth, space, and atmosphere to audio sources, creating lush, spacious ambience. Designed for mono use, it provides a smooth, musical reverb tail suitable for vocals and synthesizers.

**Highlights:** Classic Freeverb algorithm, Schroeder/Moorer reverb topology, Comb and allpass filters, Mono operation, Adds depth and space to audio, Smooth, musical reverb tail

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is MIDI free?

MIDI is free to download, with no in-app purchases.

### Is Callback Freeverb free?

Callback Freeverb is free to download, with no in-app purchases.

### Which has better reviews, MIDI or Callback Freeverb?

MIDI and Callback Freeverb are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do MIDI or Callback Freeverb have ads?

Neither MIDI nor Callback Freeverb shows ads.

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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.*