# 黑鲨魔戒 vs METASELF

The clearest difference is update cadence: METASELF at every 2 weeks against 黑鲨魔戒's monthly. 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.

黑鲨魔戒 ships an update monthly, METASELF every 2 weeks. The most recent releases landed on October 8, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | 黑鲨魔戒 | METASELF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.8 (9 ratings)](https://appshunter.io/ios/app/metaself/id6739804150/reviews)** |
| Number of ratings | — | **9** |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 131 MB | 218 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [Nanchang Blackshark Technologies Co., Ltd.](https://appshunter.io/developer/1358214067) | [Chengdu Meituo Digital Technology Co., Ltd](https://appshunter.io/developer/1662449364) |

## What reviewers say

### 黑鲨魔戒

[App page](https://appshunter.io/ios/app/id6479516111)

**Features:** macOS Compatibility

**In-app purchases:** none


### METASELF

[App page](https://appshunter.io/ios/app/metaself/id6739804150)

This smart ring app tracks your steps and sleep metrics. It records and analyzes exercise data from the ring to help you optimize your workouts.

**Highlights:** Step tracking, Sleep monitoring, Exercise data analysis, Workout optimization, Smart ring integration

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 黑鲨魔戒 free?

黑鲨魔戒 is free to download, with no in-app purchases.

### Is METASELF free?

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

### Do 黑鲨魔戒 or METASELF have ads?

Neither 黑鲨魔戒 nor METASELF shows ads.

### Which is updated more often, 黑鲨魔戒 or METASELF?

黑鲨魔戒 ships an update monthly, and METASELF every 2 weeks. Most recently, 黑鲨魔戒 was updated on October 8, 2026 and METASELF on September 26, 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.*