S vs JAX Kryostatic
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
S
This semi-modular synthesizer app for iPad offers a hands-on sound design experience with a single-screen interface for intuitive patching. It delivers a warm, vintage sound inspired by 1970s synthesizers, featuring dual oscillators, resonant filters, and multiple modulation sources.
- Single-screen interface
- Fast, hands-on patching
- Vintage 1970s synth sound
- Dual oscillators
- Resonant ladder filter
- Multiple modulation sources
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S-Modular is a semi-modular synthesiser for iPad, designed for fast, hands-on patching without clutter. Everything is presented on a single screen, making sound design immediate and intuitive. Simply drag from one jack to another to create connections. S-Modular delivers a distinctive vintage sound inspired by classic 1970s synthesis — warm, rich, and full of character. Features Dual oscillators 24 dB/oct ladder filter Resonant high-pass and low-pass filters Two LFOs Four-step CV sequencer Four-track mixer Audio and CV splitter Two AHR envelope generators Delay effect
JAX Kryostatic
This audio effect processor freezes and shifts live audio streams in real time. It offers intuitive touch controls for sound design and musical analysis, with a focus on low CPU usage.
- Real-time audio stream freezing
- Spectrum shifting capabilities
- Dual stereo FFT waterfall display
- Touch and slide interface
- Adjustable freezing intensity
- Low CPU usage optimization
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Technobabble: Synchronous polyphasic temporal compression for the coherent transsubstantiation of the phase-modulated frequency spectrum into a cross-dimensional, entropy-resistant acoustic singularity... to put it in simple terms: a baryonic resonance oscillation with fractal phase inversion that deconstructs the continuous time vector within the Hilbert space, freezing it inside an infinite, dimensionless audio event horizon. JAX Kryostatic is an AudioUnit (AUv3). AudioUnits require an audio host application. We produce audio tools exclusively for Apple platforms. The audio effect processor freezes your audio stream in real time. At the heart of its visualization lies an energy correlometer, alongside a dual stereo FFT waterfall display with adjustable flow speed. Using a "Touch and Slide" interface, you can intuitively freeze and shift the live stream's spectrum, visibly - even into extreme ranges. The freezing effect itself is automatic or freely adjustable, ranging from "Soft Iced" to "Hard Iced." So JAX Kryostatic serves equally well as a creative tool for sound design or simply as a musical analysis utility. This AudioUnit is highly optimized for real-time audio processing and very low CPU usage, as its entire graphical visualization is de-coupled and calculated / rendered directly on the GPU. Our new concept involves releasing some of our fully produced songs alongside our FRONTIER SERIES Audio Units. In doing so, we aim to illustrate our new guiding principle: providing musical tools rather than chasing obscure trends of noise production. The Manual is available for download at : https://audio.digitster.com/wp-content/uploads/2026/05/JAX-Kryostatic.pdf
Screenshots
Verdict
The clearest difference is price: S at $2.99 against JAX Kryostatic's $12.99. S also leads on rating (2.6 vs 1.0) and ratings volume (11 vs 1). On ads, in-app purchases, monetization model and device support 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
S costs $2.99 and JAX Kryostatic $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.
S holds the better App Store score, 2.6 against 1.0. That said, the two scores are not equally well evidenced: S has 11 ratings behind it against 1, so its average is the more settled of the two.
| Parameter | S | JAX Kryostatic |
|---|---|---|
| Price | $2.99 — better | $12.99 |
| Rating | 2.6 (11 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 31.3% of reviews | — |
| Number of ratings | 11 — better | 1 |
| Update frequency | Every 7 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.6 |
| Further details — not scored | ||
| Size | 7 MB | 155 MB |
| Age rating | 4+ | 4+ |
| Developer | Paul Betowski | Jens Guell |
Customer experience
S
JAX Kryostatic
In-app purchases
S
No in-app purchases
JAX Kryostatic
No in-app purchases









