# ab EQ X vs Robot Butter

The clearest difference is price: ab EQ X at $5.99 against Robot Butter's $14.99. ab EQ X also leads on iOS requirement (15 vs 17.0). Robot Butter's advantage is update cadence (monthly vs every 6 months). On rating, ratings volume, ads and in-app purchases there is nothing between them.

ab EQ X costs $5.99 and Robot Butter $14.99 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 ab EQ X against 5.0 for Robot Butter. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

ab EQ X ships an update every 6 months, Robot Butter monthly. Both last shipped on November 5, 2026.

## The numbers

| Metric | ab EQ X | Robot Butter |
| --- | --- | --- |
| Price | **$5.99** | $14.99 |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/ab-eq-x/id6758950459/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/robot-butter/id6759990682/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | Paid | Paid |
| Size | 12 MB | 7 MB |
| Requires iOS | **15** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Alejandro Cabrera Zuniga](https://appshunter.io/developer/1660382836) | [Christian Thompson](https://appshunter.io/developer/1511795684) |

## What reviewers say

### ab EQ X

[App page](https://appshunter.io/ios/app/ab-eq-x/id6758950459)

This application offers a parametric equalizer that operates with Ambisonics technology. It allows independent equalization of three dimensional poles (LEFT, RIGHT, FRONT) with five bands each, supporting various filter types and a DRY/WET mix control.

**Highlights:** Ambisonics-based equalization, 3 independent dimensional poles (LEFT, RIGHT, FRONT), 5 bands per pole, Multiple filter types (HP, LP, Shelf, Bell, Notch), DRY/WET MIX control

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is ab EQ X free?

ab EQ X costs $5.99, with no in-app purchases.

### Is Robot Butter free?

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

### Which has better reviews, ab EQ X or Robot Butter?

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

### Do ab EQ X or Robot Butter have ads?

Neither ab EQ X nor Robot Butter shows ads.

### Which is updated more often, ab EQ X or Robot Butter?

ab EQ X ships an update every 6 months, and Robot Butter monthly. Most recently, ab EQ X was updated on November 5, 2026 and Robot Butter on November 5, 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.*