# WMM 2025 vs OsmoTagger

The clearest difference is price: OsmoTagger at Free against WMM 2025's $0.99. OsmoTagger also leads on update cadence (every 7 months vs every 24 months). WMM 2025's advantage is iOS requirement (13.0 vs 15.2). On ads, in-app purchases and device support there is nothing between them.

OsmoTagger is free to download; WMM 2025 costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

WMM 2025 ships an update every 24 months, OsmoTagger every 7 months. The most recent releases landed on October 23, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | WMM 2025 | OsmoTagger |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/wmm-2025/id1667328548/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 7 months** |
| Monetization | Paid | — |
| Size | 1 MB | 95 MB |
| Requires iOS | **13.0** | 15.2 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Robert Walker](https://appshunter.io/developer/299475042) | [Evgen Bodunov](https://appshunter.io/developer/321745477) |

## What reviewers say

### WMM 2025

[App page](https://appshunter.io/ios/app/wmm-2025/id1667328548)

This navigation app calculates magnetic declination and inclination for any location on Earth. It's useful for pilots, sailors, cartographers, and anyone using maps and compasses to plot courses. The model is accurate from 2024 to 2029.

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

**Features:** Apple Watch app

**In-app purchases:** none


### OsmoTagger

[App page](https://appshunter.io/ios/app/osmotagger/id6455940975)

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

**In-app purchases:** none


## Frequently asked questions

### Is WMM 2025 free?

WMM 2025 costs $0.99, with no in-app purchases.

### Is OsmoTagger free?

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

### Do WMM 2025 or OsmoTagger have ads?

Neither WMM 2025 nor OsmoTagger shows ads.

### Which is updated more often, WMM 2025 or OsmoTagger?

WMM 2025 ships an update every 24 months, and OsmoTagger every 7 months. Most recently, WMM 2025 was updated on October 23, 2026 and OsmoTagger on October 11, 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.*