# Global Seismic Data vs StayNZ

The clearest difference is in-app purchases: Global Seismic Data at none against StayNZ's 3. StayNZ's advantage is update cadence (every 6 days vs every 8 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. StayNZ sells 3 one-off in-app purchases. Global Seismic Data asks for nothing beyond the download.

Global Seismic Data ships an update every 8 months, StayNZ every 6 days. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Global Seismic Data | StayNZ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 6 days** |
| Size | 26 MB | 3 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Global Seismic Data NZ Limited](https://appshunter.io/developer/1469156236) | [Dang Khoa Vo](https://appshunter.io/developer/1822908351) |

## What reviewers say

### Global Seismic Data

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

**Features:** macOS Compatibility

**In-app purchases:** none


### StayNZ

[App page](https://appshunter.io/ios/app/staynz/id6747790295)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee for the Dev | $2.99 | one-time |
| Lunch Break Booster | $7.99 | one-time |
| StayNZ Super Supporter | $17.99 | one-time |


## Frequently asked questions

### Is Global Seismic Data free?

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

### Is StayNZ free?

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

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

Neither Global Seismic Data nor StayNZ shows ads.

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

Global Seismic Data ships an update every 8 months, and StayNZ every 6 days. Most recently, Global Seismic Data was updated on October 26, 2026 and StayNZ on October 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*