# WMM 2025 — World Magnetic Model

> Calculates Earth's magnetic declination and inclination for navigation. (iPhone/iPad app by Robert Walker.)

- Source: https://appshunter.io/ios/app/wmm-2025/id1667328548 (this page in markdown: same URL + `.md`)
- Developer: [Robert Walker](https://appshunter.io/developer/299475042)
- Category: Navigation, Reference
- Price: $0.99
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 13.0 · 1 MB
- Languages: English
- Released: 2023-01-24
- Data updated: 2026-06-28
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/wmm-2025/id1667328548/reviews.md

## What is WMM 2025?

WMM 2025 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.)

WMM 2025 (World Magnetic Model) calculates the magnetic flux density for any location on the Earth.  The model is accurate for dates ranging from January 1, 2024 up through December 31, 2029. Using the model, the app calculates declination and inclination. In addition, the declination trend is calculated over the five year period.

## Key features

- Magnetic declination calculation
- Magnetic inclination calculation
- Accurate for 2024-2029
- Declination trend over time
- Supports various navigation professionals


## Frequently asked questions about WMM 2025

### What is WMM 2025 used for?

WMM 2025 calculates magnetic declination and inclination, which are crucial for accurately plotting courses on maps using a compass. This is essential for pilots, sailors, and surveyors.

### How accurate is the WMM 2025 model?

The World Magnetic Model used by WMM 2025 is accurate for dates ranging from January 1, 2024, through December 31, 2029. This ensures reliable declination and inclination data for the specified period.

### What devices does WMM 2025 support?

WMM 2025 is available for Apple Watch, iPhone, and iPod. This allows users to access navigation data across various Apple devices.

### When was WMM 2025 last updated?

WMM 2025 was last updated on January 2, 2025, with version 1.1. This indicates ongoing support and potential improvements to the application.

### What is the price of WMM 2025?

WMM 2025 is a paid application priced at $0.99. This one-time purchase grants access to its navigation calculation features.

### What is the age rating for WMM 2025?

WMM 2025 has an age rating of 4+. This suggests it is suitable for a wide range of users, including younger individuals interested in navigation.

### Does WMM 2025 have ads?

No, WMM 2025 does not contain advertisements. As a paid application, it provides an ad-free experience for its users.

### What is the declination trend feature in WMM 2025?

The declination trend feature in WMM 2025 calculates how magnetic declination changes over the five-year period of the model (2024-2029). This helps users anticipate future magnetic variations.

## Version history (last 2 releases)

### 1.1 — 2025-01-02

This version has been updated to include the latest model for the 2025-2030 epoch.

### 1.0 — 2023-01-25

No release notes.

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## 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

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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 2026-06-28.*