# 前场污水厂 vs 地震预警

The clearest difference is in-app purchases: 前场污水厂 at none against 地震预警's 5. 前场污水厂 also leads on ads (none vs shown) and update cadence (every 6 days vs every 5 weeks). On price and device support there is nothing between them.

Both are free to download. 地震预警 sells 5 in-app purchases, starting at $0.99 per month. 前场污水厂 asks for nothing beyond the download.

前场污水厂 ships an update every 6 days, 地震预警 every 5 weeks. The most recent releases landed on October 14, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | 前场污水厂 | 地震预警 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (36 ratings)](https://appshunter.io/ios/app/app/id6474966090/reviews)** |
| Number of ratings | — | **36** |
| Positive reviews | — | 13.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 6 days** | Every 5 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 61 MB | 38 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Chongqing senxinju Technology Co., Ltd](https://appshunter.io/developer/1447789028) | [Fuding Rongfeng Network Technology Co., Ltd.](https://appshunter.io/developer/1361888260) |

## What reviewers say

### 前场污水厂

[App page](https://appshunter.io/ios/app/id6446478525)

**Features:** macOS Compatibility

**In-app purchases:** none


### 地震预警

[App page](https://appshunter.io/ios/app/app/id6474966090)

Get real-time earthquake alerts and comprehensive seismic information from an authoritative source. This app provides instant notifications for national seismic events, nearby tremors, and daily earthquake summaries. It also includes educational content on earthquake preparedness and useful emergency tools.

**Highlights:** Real-time earthquake alerts, Nearby tremor notifications, Daily earthquake summaries, Customizable magnitude filtering, Historical seismic data visualization, Earthquake preparedness guides, Emergency tools like compass

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 地震预警月卡订阅会员 | $0.99 | per month |
| 地震预警年卡订阅会员 | $3.99 | per year |
| 地震预警月卡会员 | $0.99 | one-time |
| 地震预警年卡会员 | $3.99 | one-time |
| 地震预警永久会员 | $6.99 | one-time |


## Frequently asked questions

### Is 前场污水厂 free?

前场污水厂 is free to download, with no in-app purchases.

### Is 地震预警 free?

地震预警 is free to download, with in-app purchases available.

### Do 前场污水厂 or 地震预警 have ads?

地震预警 shows ads; 前场污水厂 does not.

### Which is updated more often, 前场污水厂 or 地震预警?

前场污水厂 ships an update every 6 days, and 地震预警 every 5 weeks. Most recently, 前场污水厂 was updated on October 14, 2026 and 地震预警 on October 18, 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.*