# 设备云维保 vs why数理

The clearest difference is device support: why数理 at 3 against 设备云维保's 1. why数理 also leads on iOS requirement (11.0 vs 17.6). 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.

设备云维保 ships an update every 3 weeks, why数理 fortnightly. The most recent releases landed on October 26, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 设备云维保 | why数理 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Size | 93 MB | 71 MB |
| Requires iOS | 17.6 | **11.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [成都冠唐科技有限公司](https://appshunter.io/developer/1065524532) | [靖一 陈](https://appshunter.io/developer/1529972276) |

## What reviewers say

### 设备云维保

[App page](https://appshunter.io/ios/app/id1414770140)

**Features:** Vision Pro support

**In-app purchases:** none


### why数理

[App page](https://appshunter.io/ios/app/why/id1539375758)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 设备云维保 free?

设备云维保 is free to download, with no in-app purchases.

### Is why数理 free?

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

### Do 设备云维保 or why数理 have ads?

Neither 设备云维保 nor why数理 shows ads.

### Which is updated more often, 设备云维保 or why数理?

设备云维保 ships an update every 3 weeks, and why数理 fortnightly. Most recently, 设备云维保 was updated on October 26, 2026 and why数理 on November 3, 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.*