# VOSIS vs Relic Flow

The clearest difference is price: VOSIS at Free against Relic Flow's $1.99. VOSIS also leads on update cadence (every 8 months vs every 17 months). Relic Flow's advantage is rating (4.8 vs 4.2) and chart position (#198 vs unranked). On review sentiment, ads, in-app purchases and device support there is nothing between them.

VOSIS is free to download; Relic Flow costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Relic Flow holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Relic Flow has 26 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 86% of VOSIS's written reviews are positive against 93% of Relic Flow's.

VOSIS ships an update every 8 months, Relic Flow every 17 months. The most recent releases landed on September 4, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | VOSIS | Relic Flow |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/vosis/id783342051/reviews) | **[4.8 (26 ratings)](https://appshunter.io/ios/app/relic-flow/id6499490810/reviews)** |
| Number of ratings | 5 | **26** |
| Positive reviews | 85.7% of reviews | **93.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 17 months |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#198** |
| Size | 11 MB | 6 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Life Orange LLC](https://appshunter.io/developer/783342054) | [Alexander Zolotov](https://appshunter.io/developer/324462547) |

## What reviewers say

### VOSIS

[App page](https://appshunter.io/ios/app/vosis/id783342051)

This app transforms image data into sound, allowing for unique musical compositions and experimental sound design. It offers control over pitch, timbre, and envelopes to create shape-timbre relationships from visual input.

**Highlights:** Image sonification, Visual music composition, Experimental sound design, Pixel luminance audification, Shape-timbre relationships, Adjustable pitch and timbre, ADSR envelope control

**In-app purchases:** none


### Relic Flow

[App page](https://appshunter.io/ios/app/relic-flow/id6499490810)

**Currently charting:** #198 Top Paid · Music (US App Store)

Generate unique Lo-Fi rhythms, noise patterns, and drum loops using advanced synthesis algorithms. Explore billions of sound samples with intuitive controls and real-time audio recording. Perfect for musicians and sound designers seeking endless creative possibilities.

**Highlights:** Lo-Fi rhythm and drum loop generation, Billions of unique sound samples, Real-time audio recording to WAV, Multiple input methods (on-screen, PC keyboard, MIDI), Export to WAV, SunVox, and text clipboard, iOS Audio Unit Extension (AUv3) support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VOSIS free?

VOSIS is free to download, with no in-app purchases.

### Is Relic Flow free?

Relic Flow costs $1.99, with no in-app purchases.

### Which has better reviews, VOSIS or Relic Flow?

Relic Flow is rated higher. VOSIS averages 4.2 out of 5 from 5 ratings, while Relic Flow averages 4.8 from 26 ratings.

### Do VOSIS or Relic Flow have ads?

Neither VOSIS nor Relic Flow shows ads.

### Which is updated more often, VOSIS or Relic Flow?

VOSIS ships an update every 8 months, and Relic Flow every 17 months. Most recently, VOSIS was updated on September 4, 2026 and Relic Flow on September 17, 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.*