# LuckRing vs 黑鲨魔戒

The clearest difference is in-app purchases: 黑鲨魔戒 at none against LuckRing's 5. 黑鲨魔戒 also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. LuckRing sells 5 one-off in-app purchases. 黑鲨魔戒 asks for nothing beyond the download.

LuckRing ships an update every 3 weeks, 黑鲨魔戒 monthly. The most recent releases landed on October 15, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | LuckRing | 黑鲨魔戒 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.1 (331 ratings)](https://appshunter.io/ios/app/luckring/id6472891975/reviews)** | — |
| Number of ratings | **331** | — |
| Positive reviews | 22.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 130 MB | 131 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Coolwear Technology Co., LTD](https://appshunter.io/developer/1530652906) | [Nanchang Blackshark Technologies Co., Ltd.](https://appshunter.io/developer/1358214067) |

## What reviewers say

### LuckRing

[App page](https://appshunter.io/ios/app/luckring/id6472891975)

This smart wearable device combines technology and fashion to offer users convenient functions and personalized experiences. It is important to note that this is not a professional medical device, and its data is for reference only.

**Highlights:** Smart wearable device, Combines technology and fashion, Convenient functions, Personalized experiences, Reference health data

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 次卡 | $0.99 | one-time |
| Vip 月卡 | $1.99 | one-time |
| 季卡 | $2.99 | one-time |
| Vip 年卡 | $3.99 | one-time |
| 永久卡 | $6.99 | one-time |

**What reviewers like**

- 🚀 Accurate health metrics
- 🔒 Reliable Bluetooth connection
- 👍 Comfortable and stylish design
- 💡 Gesture controls for media
- 👍 Comprehensive health tracking

**What reviewers complain about**

- 🐛 Inconsistent sleep tracking
- 🐛 Glitchy app updates
- 👎 Limited workout options
- 👎 Confusing sleep stage terminology
- 🔋 Shorter battery life after updates

**Reported bugs**

- App login/registration issues
- Disconnection problems
- Data loss after app updates
- Inaccurate step/activity tracking

**Requested features**

- Option to change temperature unit
- Weekly/monthly health data reporting
- Automatic nap detection
- Ability to sync with Apple Health


### 黑鲨魔戒

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is LuckRing free?

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

### Is 黑鲨魔戒 free?

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

### Do LuckRing or 黑鲨魔戒 have ads?

Neither LuckRing nor 黑鲨魔戒 shows ads.

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

LuckRing ships an update every 3 weeks, and 黑鲨魔戒 monthly. Most recently, LuckRing was updated on October 15, 2026 and 黑鲨魔戒 on October 8, 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.*