# ab EQ X vs SL Echo

The clearest difference is update cadence: SL Echo at weekly against ab EQ X's every 6 months. ab EQ X's advantage is price ($5.99 vs $6.99). On rating, ratings volume, ads and in-app purchases there is nothing between them.

ab EQ X costs $5.99 and SL Echo $6.99 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 SL Echo. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

ab EQ X ships an update every 6 months, SL Echo weekly. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | ab EQ X | SL Echo |
| --- | --- | --- |
| Price | **$5.99** | $6.99 |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/ab-eq-x/id6758950459/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/sl-echo/id6797348934/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | Paid | Paid |
| Size | 12 MB | 18 MB |
| Requires iOS | 15 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alejandro Cabrera Zuniga](https://appshunter.io/developer/1660382836) | [VIACHESLAV ZHILTSOV](https://appshunter.io/developer/1862005860) |

## 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


### SL Echo

[App page](https://appshunter.io/ios/app/sl-echo/id6797348934)

This audio effect app provides animated delay and space for musical decisions on iPad. Easily adjust time, feedback, and tone for various repeat styles, while maintaining a clear dry signal with stereo width and ducking. It supports AUv3 integration with popular music hosts.

**Highlights:** Animated delay and space effects, Adjustable time and feedback, Tone shaping controls, Stereo width and ducking, AUv3 support, Standalone preview mode, Factory and user presets

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

**In-app purchases:** none


## Frequently asked questions

### Is ab EQ X free?

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

### Is SL Echo free?

SL Echo costs $6.99, with no in-app purchases.

### Which has better reviews, ab EQ X or SL Echo?

ab EQ X and SL Echo are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do ab EQ X or SL Echo have ads?

Neither ab EQ X nor SL Echo shows ads.

### Which is updated more often, ab EQ X or SL Echo?

ab EQ X ships an update every 6 months, and SL Echo weekly. Most recently, ab EQ X was updated on October 24, 2026 and SL Echo on October 16, 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.*