# 阅燃 vs Active Defender

The clearest difference is update cadence: 阅燃 at monthly against Active Defender's every 2 months. 阅燃 also leads on iOS requirement (11.0 vs 15.6). 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.

阅燃 ships an update monthly, Active Defender every 2 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | 阅燃 | Active Defender |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (54 ratings)](https://appshunter.io/ios/app/active-defender/id1436872758/reviews)** |
| Number of ratings | — | **54** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | — | Free |
| Size | 101 MB | 215 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chengdu Zhixin Technology Co,.Ltd.](https://appshunter.io/developer/1536893274) | [MMOJ](https://appshunter.io/developer/394675746) |

## What reviewers say

### 阅燃

[App page](https://appshunter.io/ios/app/id1186238420)

**Features:** macOS Compatibility

**In-app purchases:** none


### Active Defender

[App page](https://appshunter.io/ios/app/active-defender/id1436872758)

This app provides real-time emergency maps to reduce chaos and confusion during critical incidents. It offers instant visual guidance for students, staff, and first responders, ensuring everyone knows what to do and where to go.  It facilitates communication and provides crucial information for swift and effective emergency response.

**Highlights:** Real-time emergency map, Instant multistory mapping, Emergency alerts, Real-time chat communication, Crisis location and nature, Campus-wide information sharing

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

**In-app purchases:** none

**What reviewers like**

- 🕊️ Peace of mind for safety
- 🚀 Quick and clear emergency communication
- 👍 Easy to use
- ⭐ Incredible support
- 🔥 Passionate staff about safety


## Frequently asked questions

### Is 阅燃 free?

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

### Is Active Defender free?

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

### Do 阅燃 or Active Defender have ads?

Neither 阅燃 nor Active Defender shows ads.

### Which is updated more often, 阅燃 or Active Defender?

阅燃 ships an update monthly, and Active Defender every 2 months. Most recently, 阅燃 was updated on November 2, 2026 and Active Defender on November 2, 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.*