# 水库监测 vs 防汛E

The clearest difference is iOS requirement: 水库监测 at 9.0 against 防汛E's 12.0. 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.

水库监测 ships an update every 3 weeks, 防汛E fortnightly. The most recent releases landed on September 22, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 水库监测 | 防汛E |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Size | 93 MB | 56 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yunnan Aerospace Engineering Geophysical Detecting Co.,Ltd.](https://appshunter.io/developer/1555410098) | [Shaanxi Shanqingshuixiu Information Technology Co. LTD](https://appshunter.io/developer/1437336464) |

## What reviewers say

### 水库监测

[App page](https://appshunter.io/ios/app/id1521403120)

**Features:** macOS Compatibility

**In-app purchases:** none


### 防汛E

[App page](https://appshunter.io/ios/app/e/id1569571714)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 水库监测 free?

水库监测 is free to download, with no in-app purchases.

### Is 防汛E free?

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

### Do 水库监测 or 防汛E have ads?

Neither 水库监测 nor 防汛E shows ads.

### Which is updated more often, 水库监测 or 防汛E?

水库监测 ships an update every 3 weeks, and 防汛E fortnightly. Most recently, 水库监测 was updated on September 22, 2026 and 防汛E on October 6, 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.*