# 科减 vs UOIN

The clearest difference is in-app purchases: 科减 at none against UOIN's 2. UOIN's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. UOIN sells 2 in-app purchases, starting at $4.49 per month. 科减 asks for nothing beyond the download.

科减 ships an update every 2 months, UOIN every 3 weeks. The most recent releases landed on October 18, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 科减 | UOIN |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 117 MB | 120 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [生命说(北京)健康管理有限公司](https://appshunter.io/developer/1382129406) | [Shenzhen Aiyou Digital Intelligence Co., Ltd.](https://appshunter.io/developer/1590480226) |

## What reviewers say

### 科减

[App page](https://appshunter.io/ios/app/id1382129407)

**Features:** macOS Compatibility

**In-app purchases:** none


### UOIN

[App page](https://appshunter.io/ios/app/uoin/id1590480224)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 哑铃课程VIP | $4.49 | per month |
| 哑铃课程VIP 高能燃脂健身 | $3.99 | one-time |


## Frequently asked questions

### Is 科减 free?

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

### Is UOIN free?

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

### Do 科减 or UOIN have ads?

Neither 科减 nor UOIN shows ads.

### Which is updated more often, 科减 or UOIN?

科减 ships an update every 2 months, and UOIN every 3 weeks. Most recently, 科减 was updated on October 18, 2026 and UOIN on October 25, 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.*