# Earthquake Alert & Warning vs ClockSync Pro

The clearest difference is in-app purchases: ClockSync Pro at none against Earthquake Alert & Warning's 9. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Earthquake Alert & Warning sells 9 in-app purchases, starting at $0.99 per 7 days. ClockSync Pro asks for nothing beyond the download.

## The numbers

| Metric | Earthquake Alert & Warning | ClockSync Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (56 ratings)](https://appshunter.io/ios/app/earthquake-alert-and-warning/id6503068568/reviews)** | — |
| Number of ratings | **56** | — |
| Positive reviews | 72.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 21 MB | 1 MB |
| Requires iOS | 13.1 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [炜立 张](https://appshunter.io/developer/1721722629) | [春演 余](https://appshunter.io/developer/1886758083) |

## What reviewers say

### Earthquake Alert & Warning

[App page](https://appshunter.io/ios/app/earthquake-alert-and-warning/id6503068568)

Receive immediate earthquake warnings seconds to minutes before seismic waves arrive. Access a vast database of historical earthquake data and customize alerts for regions of interest. Stay informed and prepared with timely, actionable information.

**Highlights:** Instant earthquake warning notifications, Access to millions of historical earthquake records, Customizable alerts for regions of concern, Magnitude-based push notification settings, Data from multiple global sources (CENC, USGS, EMSC, JWA)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $0.99 | per 7 days |
| 周会员 | $0.99 | per 7 days |
| 包月 | $2.99 | per month |
| 周会员 | $3.99 | per 7 days |
| 包年 | $4.99 | per year |
| 月订阅 | $4.99 | per month |
| 年订阅 | $29.99 | per year |
| 永久会员 | $9.99 | one-time |
| 永久会员 | $39.99 | one-time |


### ClockSync Pro

[App page](https://appshunter.io/ios/app/clocksync-pro/id6814334818)

**In-app purchases:** none


## Frequently asked questions

### Is Earthquake Alert & Warning free?

Earthquake Alert & Warning is free to download, with in-app purchases available.

### Is ClockSync Pro free?

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

### Do Earthquake Alert & Warning or ClockSync Pro have ads?

Neither Earthquake Alert & Warning nor ClockSync Pro shows ads.

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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.*