# Global Seismic Data vs QuakeLink

The clearest difference is update cadence: QuakeLink at every 3 weeks against Global Seismic Data's every 8 months. QuakeLink also leads on iOS requirement (15.0 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, QuakeLink every 3 weeks. The most recent releases landed on October 11, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Global Seismic Data | QuakeLink |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 weeks** |
| Size | 26 MB | 4 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Global Seismic Data NZ Limited](https://appshunter.io/developer/1469156236) | [Tayyib Temizel](https://appshunter.io/developer/1695734867) |

## What reviewers say

### Global Seismic Data

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

**Features:** macOS Compatibility

**In-app purchases:** none


### QuakeLink

[App page](https://appshunter.io/ios/app/quakelink/id6756802024)

**Features:** macOS Compatibility

**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 QuakeLink free?

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

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

Neither Global Seismic Data nor QuakeLink shows ads.

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

Global Seismic Data ships an update every 8 months, and QuakeLink every 3 weeks. Most recently, Global Seismic Data was updated on October 11, 2026 and QuakeLink on September 29, 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.*