# SynthStamp vs Evil Otto

The clearest difference is ratings volume: SynthStamp at 12 against Evil Otto's 4. Evil Otto's advantage is iOS requirement (12.0 vs 16.0). On price, rating, review sentiment and ads there is nothing between them.

SynthStamp costs $4.99 and Evil Otto $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.4 for SynthStamp against 4.5 for Evil Otto. Both are backed by a comparable volume of ratings — 12 and 4 respectively. Written reviews split almost evenly too, at 50% and 50% positive.

## The numbers

| Metric | SynthStamp | Evil Otto |
| --- | --- | --- |
| Price | $4.99 | $4.99 |
| Rating | [4.4 (12 ratings)](https://appshunter.io/ios/app/synthstamp/id6760490718/reviews) | **[4.5 (4 ratings)](https://appshunter.io/ios/app/evil-otto/id6760843522/reviews)** |
| Number of ratings | **12** | 4 |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Monetization | Paid | Paid |
| Size | 39 MB | 60 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Musicology Group, Inc.](https://appshunter.io/developer/1061725506) | [Audio Damage, Inc.](https://appshunter.io/developer/1248448317) |

## What reviewers say

### SynthStamp

[App page](https://appshunter.io/ios/app/synthstamp/id6760490718)

Explore vintage synthesizers with fully modeled engines and familiar interfaces. Patch, save, and share your creations across devices. Features real-time effects processing and models based on iconic hardware.

**Highlights:** Fully modeled vintage synth engines, Patchable semi-modular synthesizer, Circuit-bendable sampling keyboard, Real-time effects processing, Audio Unit (AUv3) plugin support, Cross-device preset sharing

**Features:** Vision Pro support

**In-app purchases:** none


### Evil Otto

[App page](https://appshunter.io/ios/app/evil-otto/id6760843522)

This audio effect applies simultaneous upward and downward compression across three frequency bands for detailed sound. It offers precise control over audio dynamics and includes features like sidechain input and real-time metering.

**Highlights:** Three-band OTT compression, Precise control parameters, Sidechain input for rhythmic effects, Real-time metering per band, Factory and user presets, Cross-platform preset compatibility

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SynthStamp free?

SynthStamp costs $4.99, with no in-app purchases.

### Is Evil Otto free?

Evil Otto costs $4.99, with no in-app purchases.

### Which has better reviews, SynthStamp or Evil Otto?

Evil Otto is rated higher. SynthStamp averages 4.4 out of 5 from 12 ratings, while Evil Otto averages 4.5 from 4 ratings.

### Do SynthStamp or Evil Otto have ads?

Neither SynthStamp nor Evil Otto 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.*