# SJ vs VU950 FX

The clearest difference is price: SJ at $0.49 against VU950 FX's $2.99. VU950 FX's advantage is iOS requirement (15.0 vs 26.5). On update cadence, ads, in-app purchases and device support there is nothing between them.

SJ costs $0.49 and VU950 FX $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SJ ships an update fortnightly, VU950 FX every 3 weeks. Both last shipped on November 10, 2026.

## The numbers

| Metric | SJ | VU950 FX |
| --- | --- | --- |
| Price | **$0.49** | $2.99 |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/vu950-fx/id6799498407/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | — | Paid |
| Size | 30 MB | 20 MB |
| Requires iOS | 26.5 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kouki Yoshimoto](https://appshunter.io/developer/1884780659) | [Dariusz Chynek](https://appshunter.io/developer/1805845479) |

## What reviewers say

### SJ

[App page](https://appshunter.io/ios/app/sj-square-synthesizer/id6797394418)

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

**In-app purchases:** none


### VU950 FX

[App page](https://appshunter.io/ios/app/vu950-fx/id6799498407)

This audio effect plugin emulates classic sampler tones with 12-bit DSP. It offers sample-rate reduction, input drive, and an adjustable anti-aliasing filter to shape your sound. Perfect for adding gritty character to your music productions.

**Highlights:** 12-bit DSP model, Sample-rate reduction, Input drive, Adjustable anti-aliasing filter, Bass and presence coloration, Noise generation

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

**In-app purchases:** none


## Frequently asked questions

### Is SJ free?

SJ costs $0.49, with no in-app purchases.

### Is VU950 FX free?

VU950 FX costs $2.99, with no in-app purchases.

### Do SJ or VU950 FX have ads?

Neither SJ nor VU950 FX shows ads.

### Which is updated more often, SJ or VU950 FX?

SJ ships an update fortnightly, and VU950 FX every 3 weeks. Most recently, SJ was updated on November 10, 2026 and VU950 FX on November 10, 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.*