# VOSIS vs PhonoPaper

The clearest difference is rating: PhonoPaper at 4.6 against VOSIS's 4.2. PhonoPaper also leads on ratings volume (45 vs 5). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PhonoPaper holds the better App Store score, 4.6 against 4.2. That said, the two scores are not equally well evidenced: PhonoPaper has 45 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 86% of VOSIS's written reviews are positive against 83% of PhonoPaper's, so the app with the better star average is not the one people write more warmly about.

VOSIS ships an update every 8 months, PhonoPaper every 4 months. The most recent releases landed on October 6, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | VOSIS | PhonoPaper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/vosis/id783342051/reviews) | **[4.6 (45 ratings)](https://appshunter.io/ios/app/phonopaper/id865947553/reviews)** |
| Number of ratings | 5 | **45** |
| Positive reviews | **85.7% of reviews** | 82.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 11 MB | 4 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


### PhonoPaper

[App page](https://appshunter.io/ios/app/phonopaper/id865947553)

This app decodes images containing encoded sound, allowing you to play back audio embedded within visual patterns. You can also record your own sounds and convert them into these unique visual codes. It's designed for creative audio messaging and artistic expression.

**Highlights:** Decode images with encoded sound, Create sound codes from recordings, Offline decoding capability, Analogue code for distortion resilience, Real-time, hand-controlled playback, Draw codes for unique sounds

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VOSIS free?

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

### Is PhonoPaper free?

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

### Which has better reviews, VOSIS or PhonoPaper?

PhonoPaper is rated higher. VOSIS averages 4.2 out of 5 from 5 ratings, while PhonoPaper averages 4.6 from 45 ratings.

### Do VOSIS or PhonoPaper have ads?

Neither VOSIS nor PhonoPaper shows ads.

### Which is updated more often, VOSIS or PhonoPaper?

VOSIS ships an update every 8 months, and PhonoPaper every 4 months. Most recently, VOSIS was updated on October 6, 2026 and PhonoPaper on October 14, 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.*