# AIZO RING vs 黑鲨魔戒

AIZO RING and 黑鲨魔戒 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Both ship on a similar rhythm, roughly monthly. Both last shipped on September 21, 2026.

## The numbers

| Metric | AIZO RING | 黑鲨魔戒 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (44 ratings)](https://appshunter.io/ios/app/aizo-ring/id1643282888/reviews)** | — |
| Number of ratings | **44** | — |
| Positive reviews | 6.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free | — |
| Size | 147 MB | 131 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Shenzhen eIoT Technology Co., Ltd.](https://appshunter.io/developer/1020558089) | [Nanchang Blackshark Technologies Co., Ltd.](https://appshunter.io/developer/1358214067) |

## What reviewers say

### AIZO RING

[App page](https://appshunter.io/ios/app/aizo-ring/id1643282888)

This app helps you track and analyze your exercise and sleep patterns using data from smart devices. It offers insights into your body's status and provides professional guidance to improve your physical condition and sleep quality.

**Highlights:** Exercise recording and data analysis, Sleep monitoring and analysis, Exercise data visualization, Professional sleep statistics, HealthKit integration for steps and calories, Personalized health guidance

**Features:** macOS Compatibility

**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 AIZO RING free?

AIZO RING 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 AIZO RING or 黑鲨魔戒 have ads?

Neither AIZO RING nor 黑鲨魔戒 shows ads.

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

AIZO RING ships an update monthly, and 黑鲨魔戒 monthly. Most recently, AIZO RING was updated on September 21, 2026 and 黑鲨魔戒 on September 21, 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.*