# STF ZEN vs SINWO RING

The clearest difference is iOS requirement: STF ZEN at 9.0 against SINWO RING's 13.0. On price, ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | STF ZEN | SINWO RING |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 45 MB | 121 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [STUFFACTORY](https://appshunter.io/developer/1476804950) | [福建星网智慧科技有限公司](https://appshunter.io/developer/1432428456) |

## What reviewers say

### STF ZEN

[App page](https://appshunter.io/ios/app/stf-zen/id6730119787)

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

**In-app purchases:** none


### SINWO RING

[App page](https://appshunter.io/ios/app/sinwo-ring/id6754276839)

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

**In-app purchases:** none


## Frequently asked questions

### Is STF ZEN free?

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

### Is SINWO RING free?

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

### Do STF ZEN or SINWO RING have ads?

Neither STF ZEN nor SINWO RING 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.*