# CUDIS vs 黑鲨魔戒

The clearest difference is iOS requirement: 黑鲨魔戒 at 13.0 against CUDIS's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

CUDIS ships an update every 2 weeks, 黑鲨魔戒 monthly. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | CUDIS | 黑鲨魔戒 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (54 ratings)](https://appshunter.io/ios/app/cudis/id6479181363/reviews)** | — |
| Number of ratings | **54** | — |
| Positive reviews | 87.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | Free | — |
| Size | 155 MB | 131 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [BeatBit Inc.](https://appshunter.io/developer/1732859129) | [Nanchang Blackshark Technologies Co., Ltd.](https://appshunter.io/developer/1358214067) |

## What reviewers say

### CUDIS

[App page](https://appshunter.io/ios/app/cudis/id6479181363)

This app connects to an AI smart ring that tracks your longevity journey. It provides insights and rewards for healthy living. The app emphasizes that it is not a medical device and users should consult healthcare professionals.

**Highlights:** Manage AI smart ring, Track longevity journey, Receive rewards, Health insights, Connects to smart ring hardware

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

**In-app purchases:** none


### 黑鲨魔戒

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CUDIS free?

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

### Is 黑鲨魔戒 free?

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

### Do CUDIS or 黑鲨魔戒 have ads?

Neither CUDIS nor 黑鲨魔戒 shows ads.

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

CUDIS ships an update every 2 weeks, and 黑鲨魔戒 monthly. Most recently, CUDIS was updated on October 7, 2026 and 黑鲨魔戒 on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*