# RetroSFX vs 055U4RY

The clearest difference is update cadence: 055U4RY at every 6 days against RetroSFX's every 5 weeks. 055U4RY also leads on chart position (#73 vs unranked) and device support. RetroSFX's advantage is price ($0.99 vs $1.99) and iOS requirement (15.0 vs 17.0). On in-app purchases there is nothing between them.

RetroSFX costs $0.99 and 055U4RY $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RetroSFX ships an update every 5 weeks, 055U4RY every 6 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | RetroSFX | 055U4RY |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | — | **[5.0 (28 ratings)](https://appshunter.io/ios/app/055u4ry/id6789734684/reviews)** |
| Number of ratings | — | **28** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | Every 5 weeks | **Every 6 days** |
| Monetization | — | Paid |
| Best chart rank | — | **#73** |
| Size | 133 MB | 2 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | — | **iPhone, iPad, Mac** |
| Age rating | 4+ | 9+ |
| Developer | [Ali Taleb](https://appshunter.io/developer/1635037808) | [LASZLO DOBROVOLSZKI](https://appshunter.io/developer/6779159106) |

## What reviewers say

### RetroSFX

[App page](https://appshunter.io/ios/app/retrosfx/id6761139769)

**In-app purchases:** none


### 055U4RY

[App page](https://appshunter.io/ios/app/055u4ry/id6789734684)

**Currently charting:** #73 Top Paid · Music (US App Store)

This app is a unique polyphonic synthesizer designed to evoke horror-themed soundscapes. It features a distinctive visual interface resembling a haunted DOS terminal with a skull motif, offering a variety of synthesis engines and effects for creating unsettling audio.

**Highlights:** 8-voice polyphonic synthesizer, 15 synthesis engines, Twin chaotic LFOs, Shepard-Risset layer, State-variable filter, Sample-rate reducer and bit-depth crusher, Real-time stutter buffer (GLTCH)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RetroSFX free?

RetroSFX costs $0.99, with no in-app purchases.

### Is 055U4RY free?

055U4RY costs $1.99, with no in-app purchases.

### Which is updated more often, RetroSFX or 055U4RY?

RetroSFX ships an update every 5 weeks, and 055U4RY every 6 days. Most recently, RetroSFX was updated on October 25, 2026 and 055U4RY on October 31, 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.*