# 海南天气_old vs 51知灾害

The clearest difference is iOS requirement: 51知灾害 at 9.0 against 海南天气_old's 13.0. On price, review sentiment, update cadence and ads there is nothing between them.

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

海南天气_old ships an update every 7 months, 51知灾害 every 4 months. The most recent releases landed on October 5, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 海南天气_old | 51知灾害 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 108 MB | 53 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [海南省气象灾害防御中心](https://appshunter.io/developer/1850868514) | [钦荣 翁](https://appshunter.io/developer/1278827536) |

## What reviewers say

### 海南天气_old

[App page](https://appshunter.io/ios/app/old/id923832390)

This weather app provides real-time meteorological data tailored for decision-making in Hainan province. It ensures accurate and timely information delivery to government and relevant departments, enhancing mobile meteorological services.

**Highlights:** Real-time meteorological data, Decision-making support, Mobile push notifications, Accurate and timely information, Adapted for smartphones

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

**In-app purchases:** none


### 51知灾害

[App page](https://appshunter.io/ios/app/51/id1592935902)

This application provides comprehensive professional service modules. It has been comprehensively upgraded to offer enhanced functionality and user experience.

**Highlights:** Comprehensive professional service modules, Upgraded functionality, Enhanced user experience, Weather information services

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

**In-app purchases:** none


## Frequently asked questions

### Is 海南天气_old free?

海南天气_old is free to download, with no in-app purchases.

### Is 51知灾害 free?

51知灾害 is free to download, with no in-app purchases.

### Do 海南天气_old or 51知灾害 have ads?

Neither 海南天气_old nor 51知灾害 shows ads.

### Which is updated more often, 海南天气_old or 51知灾害?

海南天气_old ships an update every 7 months, and 51知灾害 every 4 months. Most recently, 海南天气_old was updated on October 5, 2026 and 51知灾害 on October 9, 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.*