# 地震预警 vs Docmark

The clearest difference is review sentiment: Docmark at 100% against 地震预警's 29%. Docmark also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.6). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. 地震预警 sells 20 in-app purchases, starting at $1.99 per year and Docmark sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 26, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | 地震预警 | Docmark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.9 (163 ratings)](https://appshunter.io/ios/app/id713947342/reviews)** | — |
| Number of ratings | **163** | — |
| Positive reviews | 29.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 174 MB | 46 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Institute of Care-Life](https://appshunter.io/developer/652755841) | [CometDust Technology (Guangzhou) Co., Ltd](https://appshunter.io/developer/1763733479) |

## What reviewers say

### 地震预警

[App page](https://appshunter.io/ios/app/id713947342)

Receive early warnings for earthquakes seconds to tens of seconds before they strike. Customize alert thresholds, view detailed seismic information, and report emergency situations. Access educational content and review past alerts.

**Highlights:** Earthquake early warning service, Customizable alert thresholds, View epicenter, magnitude, and intensity, Emergency distress message upload, Earthquake preparedness education, Review alert history

**Features:** Vision Pro support

**In-app purchases (20)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 地震预警-VIP订阅 | $1.99 | per year |
| 实时地震预警SVIP订阅 | $3.99 | per year |
| 鼓励支持-支付费用10元 | $0.99 | one-time |
| 打赏鼓励-支付费用5元 | $0.99 | one-time |
| 打赏支持-愿越做越好 | $0.99 | one-time |
| 打赏支持-小小鼓励 | $0.99 | one-time |
| 赞赏鼓励-支付费用15元 | $1.99 | one-time |
| 赞赏支持-支付费用19.8元 | $2.99 | one-time |
| 鼓励与支持-19.8 | $2.99 | one-time |
| 打赏鼓励-支付费用50元 | $6.99 | one-time |
| 鼓励与支持-48.8 | $6.99 | one-time |
| 打赏鼓励-支付费用100元 | $14.99 | one-time |
| 鼓励与支持-99.8 | $14.99 | one-time |
| 鼓励与支持-198 | $29.99 | one-time |
| 鼓励与支持-500 | $69.99 | one-time |
| 打赏鼓励-支付费用598元 | $89.99 | one-time |
| 打赏鼓励-支付费用1000元 | $149.99 | one-time |
| 打赏鼓励-支付费用1988元 | $299.99 | one-time |
| 打赏鼓励-支付费用5988元 | $899.99 | one-time |
| 打赏鼓励-支付费用6988元 | $999.99 | one-time |


### Docmark

[App page](https://appshunter.io/ios/app/docmark/id6711330172)

This app helps you manage and secure your credentials with custom watermarks. It prioritizes privacy with offline processing and optional iCloud synchronization. Organize, categorize, and batch edit your documents for enhanced security.

**Highlights:** Offline credential processing, Customizable watermarks, Batch editing and sorting, Local and iCloud storage, Organize and categorize credentials

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $2.99 | one-time |


## Frequently asked questions

### Is 地震预警 free?

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

### Is Docmark free?

Docmark is free to download, with in-app purchases available.

### Do 地震预警 or Docmark have ads?

地震预警 shows ads; Docmark does not.

### Which is updated more often, 地震预警 or Docmark?

地震预警 ships an update monthly, and Docmark monthly. Most recently, 地震预警 was updated on October 26, 2026 and Docmark on October 15, 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.*