# 危险作业管控 vs RetroSpider

The clearest difference is in-app purchases: 危险作业管控 at none against RetroSpider's 3. 危险作业管控 also leads on iOS requirement (12.0 vs 18). On price, ads and device support there is nothing between them.

Both are free to download. RetroSpider sells 3 in-app purchases, starting at $2.49 per month. 危险作业管控 asks for nothing beyond the download.

## The numbers

| Metric | 危险作业管控 | RetroSpider |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | — |
| Size | 26 MB | 15 MB |
| Requires iOS | **12.0** | 18 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [浙江易航海信息技术有限公司](https://appshunter.io/developer/1279218875) | [Weigan Technology (Shenzhen) Co., Ltd.](https://appshunter.io/developer/1896482773) |

## What reviewers say

### 危险作业管控

[App page](https://appshunter.io/ios/app/id6449081167)

**Features:** macOS Compatibility

**In-app purchases:** none


### RetroSpider

[App page](https://appshunter.io/ios/app/retrospider/id6767517596)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to VIP | $2.49 | per month |
| Upgrade to VIP | $12.99 | per year |
| Upgrade to VIP | $29.99 | one-time |


## Frequently asked questions

### Is 危险作业管控 free?

危险作业管控 is free to download, with no in-app purchases.

### Is RetroSpider free?

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

### Do 危险作业管控 or RetroSpider have ads?

Neither 危险作业管控 nor RetroSpider shows ads.

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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.*