# 天气预报大师 vs 51知灾害

The clearest difference is ads: 51知灾害 at none against 天气预报大师's shown. 51知灾害 also leads on iOS requirement (9.0 vs 15.0). 天气预报大师's advantage is update cadence (every 2 months vs every 4 months). On price, 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.

天气预报大师 ships an update every 2 months, 51知灾害 every 4 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | 天气预报大师 | 51知灾害 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | — | Free |
| Size | 30 MB | 53 MB |
| Requires iOS | 15.0 | **9.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Nantong Changyan Network Technology Co., Ltd.](https://appshunter.io/developer/1462608235) | [钦荣 翁](https://appshunter.io/developer/1278827536) |

## What reviewers say

### 天气预报大师

[App page](https://appshunter.io/ios/app/id1462608566)

**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 天气预报大师 free?

天气预报大师 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 天气预报大师 or 51知灾害 have ads?

天气预报大师 shows ads; 51知灾害 does not.

### Which is updated more often, 天气预报大师 or 51知灾害?

天气预报大师 ships an update every 2 months, and 51知灾害 every 4 months. Most recently, 天气预报大师 was updated on October 24, 2026 and 51知灾害 on October 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.*