# VOSIS vs ShadowPlayKA

The clearest difference is rating: ShadowPlayKA at 5.0 against VOSIS's 4.2. VOSIS's advantage is update cadence (every 8 months vs every 25 months) and ratings volume (5 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

ShadowPlayKA holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: VOSIS has 5 ratings behind it against 1, so its average is the more settled of the two.

VOSIS ships an update every 8 months, ShadowPlayKA every 25 months. The most recent releases landed on October 6, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | VOSIS | ShadowPlayKA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/vosis/id783342051/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/shadowplayka/id1585959421/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 25 months |
| Monetization | Free | Free |
| Size | 11 MB | 6 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Life Orange LLC](https://appshunter.io/developer/783342054) | [Daniel Wilcox](https://appshunter.io/developer/970528307) |

## 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


### ShadowPlayKA

[App page](https://appshunter.io/ios/app/shadowplayka/id1585959421)

This app transforms light and shadow patterns into music as you cycle through outdoor spaces. It uses your smartphone's brightness sensor and a Bluetooth speaker to create a unique auditory experience based on your surroundings.

**Highlights:** Light and shadow as musical score, Bicycle-mounted smartphone sensor, Bluetooth speaker integration, Exploration of urban architecture, Unique soundscape generation

**In-app purchases:** none


## Frequently asked questions

### Is VOSIS free?

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

### Is ShadowPlayKA free?

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

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

ShadowPlayKA is rated higher. VOSIS averages 4.2 out of 5 from 5 ratings, while ShadowPlayKA averages 5.0 from 1 ratings.

### Do VOSIS or ShadowPlayKA have ads?

Neither VOSIS nor ShadowPlayKA shows ads.

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

VOSIS ships an update every 8 months, and ShadowPlayKA every 25 months. Most recently, VOSIS was updated on October 6, 2026 and ShadowPlayKA on September 29, 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.*