Degenson vs Callback Freeverb
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Degenson
Create distorted percussion, hypnotic sequences, and aggressive sounds with this raw virtual analog drum machine. It offers six voices, dual LFOs, and fast hands-on control for electronic music production.
- Virtual analog drum machine
- Distorted percussion
- Hypnotic sequences
- Aggressive sound design
- Six voices
- Dual LFOs
- Hands-on control
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Degenson is a raw virtual analog drum machine built for distorted percussion, hypnotic sequences and aggressive sound design. Six voices, dual LFOs and fast hands-on control for techno, EBM and experimental production. Now it's also an AUv3 plugin: run Degenson inside your favorite iOS host — GarageBand, AUM, Cubasis, Drambo and more — perfectly in sync with your project tempo. • Six punchy virtual-analog voices with analogue-style decay — percussive across most of the knob, opening into an infinite drone at the top • Full MIDI: notes trigger the voices, every knob responds to a fixed MIDI CC, and the sequencer can be bypassed to play live from any controller • Melodic mode: each octave maps the six voices and transposes them, so you can play the drums tuned across the keyboard • Fast, tactile step sequencer with per-step control and dual LFOs for evolving, hypnotic patterns • Crunch Verb: a gritty master reverb with Mix, Decay and Crunch — the tail degrades as it fades Free to play. The optional Pro upgrade unlocks the AUv3 plugin for use in your DAW and WAV export for bouncing your patterns.
Callback Freeverb
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.
- Classic Freeverb algorithm
- Schroeder/Moorer reverb topology
- Comb and allpass filters
- Mono operation
- Adds depth and space to audio
- Smooth, musical reverb tail
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A classic algorithmic reverb effect based on the Freeverb algorithm by Jezar at Dreampoint. A Freeverb-style Schroeder/Moorer reverb based on the classic 8-comb + 4-allpass topology, with simplified controls and no stereo spread. This reverb creates lush, spacious ambience through a network of comb and allpass filters. Freeverb is widely used in electronic music production, ambient music, and sound design to add depth, space, and atmosphere to audio sources. The algorithm provides a smooth, musical reverb tail that works well on everything from vocals to synthesizers. This reverb only functions in mono and provides no stereo imaging, and the user can expect the same behavior as a classic Freeverb implementation otherwise.
Screenshots
Verdict
The clearest difference is in-app purchases: Callback Freeverb at none against Degenson's 1. Degenson's advantage is ratings volume (8 vs 1) and iOS requirement (15.0 vs 17.0). On price, rating, ads and monetization model 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
Both are free to download. Degenson sells 1 one-off in-app purchase. Callback Freeverb asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Degenson against 5.0 for Callback Freeverb. That said, the two scores are not equally well evidenced: Degenson has 8 ratings behind it against 1, so its average is the more settled of the two.
| Parameter | Degenson | Callback Freeverb |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (8 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 8 — better | 1 |
| Update frequency | Every 9 days | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 17 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Fabrizio Alviti | Callback Audio, LLC |
Customer experience
Degenson
Callback Freeverb
In-app purchases
Degenson
- Degenson Pro Upgrade$7.99
Callback Freeverb
No in-app purchases







