# Robot Butter vs EvilTwin

The clearest difference is price: EvilTwin at $2.99 against Robot Butter's $14.99. EvilTwin also leads on iOS requirement (12.0 vs 17.0). On rating, review sentiment, ratings volume and ads there is nothing between them.

Robot Butter costs $14.99 and EvilTwin $2.99 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 — 5.0 for Robot Butter against 5.0 for EvilTwin. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

## The numbers

| Metric | Robot Butter | EvilTwin |
| --- | --- | --- |
| Price | $14.99 | **$2.99** |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/robot-butter/id6759990682/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/eviltwin/id6777857701/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | — |
| Monetization | Paid | Paid |
| Size | 7 MB | 17 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad, Mac, Vision Pro | iPhone, iPad, iPod, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Christian Thompson](https://appshunter.io/developer/1511795684) | [Jeremy Phillips](https://appshunter.io/developer/6777857703) |

## What reviewers say

### Robot Butter

[App page](https://appshunter.io/ios/app/robot-butter/id6759990682)

This audio effect app creates dynamic soundscapes by blending animated modulation, adaptive reverb, and digital textures. It offers a fast, playable interface with direct control over key parameters and tempo-synced movement for evolving sound design.

**Highlights:** AUv3 audio effect for iPhone, iPad, and macOS, Animated modulation engine, Adaptive reverb stage, Tempo-synced LFO matrix, Digital texture effects, Built-in user manual, Factory and user presets

**In-app purchases:** none


### EvilTwin

[App page](https://appshunter.io/ios/app/eviltwin/id6777857701)

This audio effect plugin adds width, motion, and unique character to your sound. It offers creative stereo enhancement and dynamic spatial animation, suitable for subtle polish or dramatic transformations. Designed for musicians and sound designers, it encourages sonic exploration with a focused interface.

**Highlights:** Creative stereo enhancement and widening, Dynamic movement and spatial animation, Subtle-to-extreme sound shaping, Performance-focused interface, AUv3 support for iPad and Mac, Works with popular music hosts

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Robot Butter free?

Robot Butter costs $14.99, with no in-app purchases.

### Is EvilTwin free?

EvilTwin costs $2.99, with no in-app purchases.

### Which has better reviews, Robot Butter or EvilTwin?

Robot Butter and EvilTwin are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do Robot Butter or EvilTwin have ads?

Neither Robot Butter nor EvilTwin 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.*