# Sleep Effect vs Prostir zvuku

The clearest difference is in-app purchases: Sleep Effect at none against Prostir zvuku's 1. Prostir zvuku's advantage is iOS requirement (17.0 vs 26.1). On price, ads and device support there is nothing between them.

Both are free to download. Prostir zvuku sells 1 one-off in-app purchase. Sleep Effect asks for nothing beyond the download.

## The numbers

| Metric | Sleep Effect | Prostir zvuku |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Size | 324 MB | 107 MB |
| Requires iOS | 26.1 | **17.0** |
| Devices | iPhone, iPad | iPhone, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Ahmed Nabulsi](https://appshunter.io/developer/1863897890) | [Yevhen Holota](https://appshunter.io/developer/1636062502) |

## What reviewers say

### Sleep Effect

[App page](https://appshunter.io/ios/app/sleep-effect/id6762162467)

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

**In-app purchases:** none


### Prostir zvuku

[App page](https://appshunter.io/ios/app/prostir-zvuku/id6764804286)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Prostir Zvuku Pro Lifetime | $12.99 | one-time |


## Frequently asked questions

### Is Sleep Effect free?

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

### Is Prostir zvuku free?

Prostir zvuku is free to download, with in-app purchases available.

### Do Sleep Effect or Prostir zvuku have ads?

Neither Sleep Effect nor Prostir zvuku shows ads.

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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.*