# JAX ESSENTIALS vs SL Echo

The clearest difference is update cadence: SL Echo at every 5 days against JAX ESSENTIALS's every 2 weeks. JAX ESSENTIALS's advantage is price ($4.99 vs $6.99). On rating, ratings volume, ads and in-app purchases there is nothing between them.

JAX ESSENTIALS costs $4.99 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 JAX ESSENTIALS against 5.0 for SL Echo. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

JAX ESSENTIALS ships an update every 2 weeks, SL Echo every 5 days. The most recent releases landed on October 4, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | JAX ESSENTIALS | SL Echo |
| --- | --- | --- |
| Price | **$4.99** | $6.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/jax-essentials-phaser/id1636820878/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/sl-echo/id6797348934/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 5 days** |
| Monetization | Paid | Paid |
| Size | 33 MB | 18 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jens Guell](https://appshunter.io/developer/1195004865) | [VIACHESLAV ZHILTSOV](https://appshunter.io/developer/1862005860) |

## What reviewers say

### JAX ESSENTIALS

[App page](https://appshunter.io/ios/app/jax-essentials-phaser/id1636820878)

This audio effect plugin offers a multi-stage phaser modulation with allpass filters for dynamic soundscapes. It's compatible across Apple devices and integrates with popular music production software.

**Highlights:** Multi-stage phaser modulation, Allpass filter design, LFO for depth and speed modulation, Cross-device preset sharing, Includes ~200 factory presets, Resizable and adaptive interface

**Features:** macOS Compatibility, 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 JAX ESSENTIALS free?

JAX ESSENTIALS costs $4.99, with no in-app purchases.

### Is SL Echo free?

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

### Which has better reviews, JAX ESSENTIALS or SL Echo?

JAX ESSENTIALS and SL Echo are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do JAX ESSENTIALS or SL Echo have ads?

Neither JAX ESSENTIALS nor SL Echo shows ads.

### Which is updated more often, JAX ESSENTIALS or SL Echo?

JAX ESSENTIALS ships an update every 2 weeks, and SL Echo every 5 days. Most recently, JAX ESSENTIALS was updated on October 4, 2026 and SL Echo on September 30, 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.*