# MagVar — Magnetic Variation

> Calculates magnetic variation for navigation using Earth's magnetic field data. (iPhone/iPad app by Robert Walker.)

- Source: https://appshunter.io/ios/app/magvar/id1670958717 (this page in markdown: same URL + `.md`)
- Developer: [Robert Walker](https://appshunter.io/developer/299475042)
- Category: Navigation, Utilities
- Price: $0.99
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.6 · 2 MB
- Languages: American English
- Released: 2023-02-10
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/magvar/id1670958717/reviews.md

## What is MagVar?

MagVar is targeted towards anyone  interested in navigation.  This includes, pilots of aircraft, captains of sea going vessels, cartographers, engineers and surveyors. Anyone who uses maps and a compass will find the declination calculation (also referred to magnetic variation) very useful.  (Declination is the difference between true and magnetic north and used when plotting a course on a map.)

MagVar calculates the magnetic flux density for any location on the Earth and then uses this data to calculate magnetic variation.  The model is accurate for dates ranging from January 1, 2025 up through December 31, 2029. Using the model, the app calculates declination and inclination.

As the user pans the map, the magnetic variation is calculated and graphically shown as a map overlay.

## Key features

- Magnetic variation calculation
- True vs. magnetic north difference
- Map overlay display
- Accurate for 2025-2029
- Declination and inclination calculation

## Chart rankings

- #186 in Top Paid · Navigation (US App Store)

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/magvar/id1670958717/reviews.md

### 5/5 — Clearly gives you magnetic variation

*2025-03-21*

This is a lightweight app that calculates the magnetic variation for your current location or anywhere else in the world using a map. It is still great for calculating variation for your current position when off line (I.e. no internet) but understandably the map may not work so selecting other locations could only be done using coordinates.

## Frequently asked questions about MagVar

### What is MagVar used for?

MagVar calculates magnetic variation, which is the difference between true north and magnetic north. This is crucial for accurately plotting courses on maps when using a compass.

### Who would benefit from using MagVar?

The app is designed for pilots, sea captains, cartographers, engineers, and surveyors, essentially anyone who relies on maps and a compass for navigation.

### How accurate is the magnetic variation data in MagVar?

The magnetic variation model used by MagVar is accurate for dates ranging from January 1, 2025, through December 31, 2029.

### Does MagVar display magnetic variation on a map?

Yes, as you pan across the map within the app, MagVar calculates and graphically displays the magnetic variation as a map overlay.

### What specific calculations does MagVar perform?

MagVar calculates the magnetic flux density for any location on Earth and uses this data to determine magnetic variation, declination, and inclination.

### What devices is MagVar available on?

MagVar is available for both iPhone and iPad devices.

### How often is MagVar updated?

The latest version of MagVar is 2.0, and it was last updated on December 29, 2024, indicating active development and support.

### What is the price of MagVar?

MagVar is a paid application, priced at $0.99.

## Version history (last 2 releases)

### 2.0 — 2024-12-29

MagVar has been updated to include the latest magnetic model released for 2025.

### 1.0 — 2023-02-10

No release notes.

## Apps similar to MagVar

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Topo Maps+: Topographic Maps](https://appshunter.io/ios/app/topo-maps-plus-topographic-maps/id672246353) | 4.7 (9,305) | Free | Navigation |
| [Compass - Professional](https://appshunter.io/ios/app/compass-professional/id1289069674) | 4.7 (2,349) | Free | Navigation |
| [Spyglass](https://appshunter.io/ios/app/spyglass/id332639548) | 4.7 (3,864) | Free | Navigation |
| [Light Pollution Map](https://appshunter.io/ios/app/light-pollution-map/id1530464858) | 4.1 (46) | $4.99 | Navigation |
| [iTAK](https://appshunter.io/ios/app/itak/id1561656396) | 3.6 (155) | Free | Navigation |
| [Orca: Boat GPS, Charts, Routes](https://appshunter.io/ios/app/orca-boat-gps-charts-routes/id1514423198) | 4.6 (352) | Free | Navigation |

## More apps by Robert Walker

- [JMF Trails](https://appshunter.io/ios/app/jmf-trails/id1226190313)
- [Glider Polar](https://appshunter.io/ios/app/glider-polar/id1608086488)
- [US Standard Atmosphere](https://appshunter.io/ios/app/us-standard-atmosphere/id1610618760)
- [World Av Weather](https://appshunter.io/ios/app/world-av-weather/id1613045019)
- [OneTap Av WX](https://appshunter.io/ios/app/onetap-av-wx/id1613214113)
- [US Airports Db](https://appshunter.io/ios/app/us-airports-db/id1614164272)

All apps by Robert Walker: https://appshunter.io/developer/299475042

---

*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 2026-08-24.*