# 地灾监测 vs Activity

The clearest difference is update cadence: Activity at weekly against 地灾监测's every 7 months. 地灾监测's advantage is iOS requirement (12.0 vs 18.4). On price, ads, in-app purchases and device support there is nothing between them.

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

地灾监测 ships an update every 7 months, Activity weekly. The most recent releases landed on October 1, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | 地灾监测 | Activity |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Weekly** |
| Size | 25 MB | 2 MB |
| Requires iOS | **12.0** | 18.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [虓 赵](https://appshunter.io/developer/1628264766) | [清煜 孙](https://appshunter.io/developer/1815181652) |

## What reviewers say

### 地灾监测

[App page](https://appshunter.io/ios/app/id6447237703)

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

**In-app purchases:** none


### Activity

[App page](https://appshunter.io/ios/app/activity/id6754206929)

**In-app purchases:** none


## Frequently asked questions

### Is 地灾监测 free?

地灾监测 is free to download, with no in-app purchases.

### Is Activity free?

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

### Do 地灾监测 or Activity have ads?

Neither 地灾监测 nor Activity shows ads.

### Which is updated more often, 地灾监测 or Activity?

地灾监测 ships an update every 7 months, and Activity weekly. Most recently, 地灾监测 was updated on October 1, 2026 and Activity on September 19, 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.*