JAX SR vs SL Echo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JAX SR
This audio effect processor allows selective frequency range processing for modulation effects. It offers a classic chorus with MIDI control and aims to avoid negative side effects by targeting specific frequency bands.
- Selective frequency range processing
- Classic chorus modulation
- Optional direct MIDI control
- Universal app for multiple Apple platforms
- Avoids negative side effects of full-range effects
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The manual is available at : https://audio.digitster.com/wp-content/uploads/2024/05/JAX-SR-Chorus-Manual.pdf The JAX SR Series are AudioUnits (AUv3), which allow to select a frequency range for effect processing. This one provides a classic chorus modulation effect with optional direct MIDI control assignment to the parameters. If (especially) modulation effects are applied to the entire frequency range, this usually will introduce negative side effects. The JAX [SR] Series allow a selective frequency range and dynamic adjustment of the mix easily. More information can be found on the product website at: https://audio.digitster.com/ Please note, that AudioUnits (AUv3) require a supporting host application to perform. This build (like all our latest releases) is truly 'universal', meaning, the audio unit is available for: - MacOS (Apple Silicon) - iOS (all actual iPhones) - iPadOS (all actual iPads) - visionOS (Apple Vision Pro) Requirements: MacOS 10.15++ iOS 14.0++
SL Echo
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.
- 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
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SL Echo is a focused AUv3 delay effect designed for fast musical decisions on iPad. Move from a close vocal pocket to wide, evolving repeats without navigating complex pages. • Time and feedback for slapback or long trails • Tone shaping for darker or brighter repeats • Stereo width and ducking for a clear dry signal • Factory presets and local user presets • AUv3 support for compatible iPad music hosts Works as a standalone preview app and as an AUv3 effect in GarageBand, AUM, Cubasis, BeatMaker 3 and other compatible hosts.
Screenshots
Verdict
The clearest difference is update cadence: SL Echo at weekly against JAX SR's monthly. On price, rating, ratings volume and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
JAX SR costs $6.99 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 SR against 5.0 for SL Echo. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
JAX SR ships an update monthly, SL Echo weekly. The most recent releases landed on September 23, 2026 and October 16, 2026 respectively.
| Parameter | JAX SR | SL Echo |
|---|---|---|
| Price | $6.99 | $6.99 |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Monthly | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 21 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Jens Guell | VIACHESLAV ZHILTSOV |
Customer experience
JAX SR
SL Echo
In-app purchases
JAX SR
No in-app purchases
SL Echo
No in-app purchases
