# 地灾监测 vs PV

The clearest difference is update cadence: PV at every 4 days against 地灾监测's every 7 months. 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, PV every 4 days. The most recent releases landed on September 13, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | 地灾监测 | PV |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 days** |
| Size | 25 MB | 10 MB |
| Requires iOS | **12.0** | 12.4 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [虓 赵](https://appshunter.io/developer/1628264766) | [Suzhou Radiant Photovoltaic Technology Co., Ltd](https://appshunter.io/developer/1630691682) |

## 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


### PV

[App page](https://appshunter.io/ios/app/pv-robot/id6450347047)

**Features:** macOS Compatibility

**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 PV free?

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

### Do 地灾监测 or PV have ads?

Neither 地灾监测 nor PV shows ads.

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

地灾监测 ships an update every 7 months, and PV every 4 days. Most recently, 地灾监测 was updated on September 13, 2026 and PV on September 24, 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.*