# Global Seismic Data vs SeismicityAlert

The clearest difference is update cadence: SeismicityAlert at fortnightly against Global Seismic Data's every 8 months. SeismicityAlert also leads on iOS requirement (15.6 vs 17.0). 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.

Global Seismic Data ships an update every 8 months, SeismicityAlert fortnightly. The most recent releases landed on October 11, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Global Seismic Data | SeismicityAlert |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/seismicityalert/id6758901471/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Fortnightly** |
| Monetization | — | Free |
| Size | 26 MB | 58 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Global Seismic Data NZ Limited](https://appshunter.io/developer/1469156236) | [SensorEra Inc](https://appshunter.io/developer/1873603743) |

## What reviewers say

### Global Seismic Data

[App page](https://appshunter.io/ios/app/global-seismic-data/id1469156237)

**Features:** macOS Compatibility

**In-app purchases:** none


### SeismicityAlert

[App page](https://appshunter.io/ios/app/seismicityalert/id6758901471)

This application provides enterprise users with summarized seismic event notifications from industrial monitoring projects. It offers a map-based visualization of earthquake events, including magnitude, time, and location details. Access is secured through a login for authorized business users.

**Highlights:** Seismic event summaries, Event magnitude, time, and location overview, Map-based visualization, Secure login for authorized users

**In-app purchases:** none


## Frequently asked questions

### Is Global Seismic Data free?

Global Seismic Data is free to download, with no in-app purchases.

### Is SeismicityAlert free?

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

### Do Global Seismic Data or SeismicityAlert have ads?

Neither Global Seismic Data nor SeismicityAlert shows ads.

### Which is updated more often, Global Seismic Data or SeismicityAlert?

Global Seismic Data ships an update every 8 months, and SeismicityAlert fortnightly. Most recently, Global Seismic Data was updated on October 11, 2026 and SeismicityAlert on October 9, 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.*