# Geomagnetic Observatory — Monitor geomagnetic activity

> Monitors Earth's magnetic field data from global observatories. (iPhone/iPad app by Twarge LLC.)

- Source: https://appshunter.io/ios/app/geomagnetic-observatory/id6783194320 (this page in markdown: same URL + `.md`)
- Developer: [Twarge LLC](https://appshunter.io/developer/6781456673)
- Category: Reference
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 26.0 · 5 MB
- Languages: American English
- Released: 2026-06-25
- Data updated: 2026-09-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/geomagnetic-observatory/id6783194320/reviews.md

## What is Geomagnetic Observatory?

Geomagnetic plots live data from the world's magnetic observatories on Apple devices. Pick a station and monitor Earth's magnetic field: both its total intensity and vector components. It downloads only the slice of data you are looking at, and only the minutes it doesn't already have, so it stays quick and keeps working offline once data is cached. It is free and open source, and draws on the INTERMAGNET network of observatories.

## Key features

- Live geomagnetic plots
- Global observatory data
- Total intensity monitoring
- Vector component monitoring
- Offline data caching
- Free and open source


## Frequently asked questions about Geomagnetic Observatory

### What is Geomagnetic Observatory?

Geomagnetic Observatory is a free and open-source application that displays live geomagnetic field data from observatories worldwide. It allows users to monitor Earth's magnetic field intensity and vector components.

### Does Geomagnetic Observatory work offline?

Yes, Geomagnetic Observatory is designed to work offline. It efficiently downloads and caches data slices, ensuring continued functionality even without an internet connection once data is loaded.

### What data sources does Geomagnetic Observatory use?

Geomagnetic Observatory draws its data from the INTERMAGNET network of observatories, providing access to reliable global geomagnetic activity information.

### Is Geomagnetic Observatory free to use?

Yes, Geomagnetic Observatory is completely free to use. It is also open source, allowing for community contributions and transparency.

### What devices are compatible with Geomagnetic Observatory?

Geomagnetic Observatory is available on Apple devices, including Mac, Apple Watch, iPhone, and iPad, offering broad accessibility for its users.

### How often is Geomagnetic Observatory updated?

The latest version of Geomagnetic Observatory is 1.2, which was last updated on July 29, 2026. This indicates a commitment to ongoing development and improvements.

### What is the age rating for Geomagnetic Observatory?

Geomagnetic Observatory has an age rating of 4+, making it suitable for a wide range of users interested in scientific data.

### Does Geomagnetic Observatory have ads?

No, Geomagnetic Observatory does not contain advertisements. It is a free and ad-free application for users to enjoy.

## Version history (last 4 releases)

### 1.3 — 2026-08-26

- add share sheet
- animate widget updates

### 1.2 — 2026-07-29

More graceful handling of intermittent connectivity.

### 1.1 — 2026-06-26

- add watchOS companion app
- Higher data density in medium and large widgets

### 1.0 — 2026-06-25

No release notes.

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All apps by Twarge LLC: https://appshunter.io/developer/6781456673

## Related topics

[geomagnetic observatory](https://appshunter.io/ios/topics/geomagnetic-observatory) · [observatory](https://appshunter.io/ios/topics/observatory)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-01.*