Comparison

JAX ESSENTIALS vs SL Echo

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

JAX ESSENTIALS

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
Read full description

( THIS IS AN AUDIOUNIT. AudioUnits are app extensions, requiring any audio host application to perform. ) Use the same AudioUnits across all modern Apple devices, including the iPhone and the Mac (Apple Silicon). Native MacOS apps like GarageBand, MainStage 3 and Logic Pro X are fully supported. Any 3rd-party AUv3 supporting host should be able to host the plugin too. The JAX ESSENTIAL SERIES Phaser is a multi stage phaser modulation effect that uses multiple allpass filters, to produce all kinds of the famous phaser effect. A low frequency oscillator modulates depth and speed of the filter modulation on both stereo channels for various living and moving sound nuances. Make static sounding voices more interesting or create sweaping special effects. You may share the presets for this effect across all your supported devices. Around 200 factory presets are included, you can make and export/import your own. The complete manual is included and can be previewed on our support website: https://audio.digitster.com For advanced usage (i.e. mastering and exciting), we recommend to select the phaser from our SELECTIVE RANGE SERIES, which allows to limit the frequency range for processing. This build is truly 'universal', meaning, the audio unit is available for: - iOS (all actual iPhones) - iPadOS (all actual iPads) - macOS (Apple Silicon) - visionOS (Apple Vision Pro) Requirements: MacOS 11.0++ iOS 14.0++ Behaviour on all devices is identical. The parametric interface is resizeble and adopts to any screen size and orientation. This especially applies to Logic Pro X and all hosts with adjustable window sizes on all platforms. Display contrast can be adjusted freely and is now saved with each preset.

About

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.

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
Read full description

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

JAX ESSENTIALS4 screens
SL Echo3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 7 level
JAX ESSENTIALS versus SL Echo: the parameters behind the verdict, then further details
ParameterJAX ESSENTIALSSL Echo
Price$4.99 — better$6.99
Rating5.0 (1 ratings)5.0 (1 ratings)
Number of ratings11
Update frequencyEvery 2 weeksEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better15.0
Further details — not scored
Size33 MB18 MB
Age rating4+4+
DeveloperJens GuellVIACHESLAV ZHILTSOV

Customer experience

JAX ESSENTIALS

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

SL Echo

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

JAX ESSENTIALS

No in-app purchases

None

SL Echo

No in-app purchases

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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