Find your current magnetic declination based on the World Magnetic Mode.

Specify your position via GPS, lat/lon coordinates, UTM coordinates, or browse the world map.

Use Declination to verify and update your local magnetic declination for all your maps before you enter the backcountry!

Requires iOS4.3+

What’s New

Version 8.15.0

Support for 2015 WMM (World Magnetic Model) for more accurate values until 2020.

Ratings and Reviews

4.7 out of 5
3 Ratings

3 Ratings

dl_com_radio ,

Nice app

App works great for me. No crashes. Only a 0.04 variance from the NGCD calculations.

ArchtMig ,

nice quicky results

This app came out just as I was shopping for a new magnetic compass and was planning to go online to find out my magnetic declination. Great timing! The easiest way possible to find out what your dec. is wherever you are. I compared the data result from this app to what comes up at the Nat. Geophysical Data Center's (NGDC) magnetic declination calculator page of their website, and the two results were pretty close. This app's numbers deviate from the website's by about .68 of a degree, for my location. Not sure which source is fudging the numbers more, but what the heck, magnetic north keeps migrating anyway, and in all reality, that's about as accurate as you need to set the declination dial on a handheld magnetic compass. And for the price of FREE, who can complain?

Hutington ,

Good work, needs some improvement

Let me first appreciate your efforts. Magnetic declination from current location (GPS) works fine. I verified the values against NGDC's online calculators. One suggestion is to print the sign of the declination. For example, the - values represents the West declination and + values represents East declination. I tried Lat/Long option. I was "moved to" a location couple of degrees away from what I entered. I didn't check the UTM coordinate option.


Amphibious Technologies, LLC
15.8 MB

Requires iOS 5.1.1 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© 2010-2013 Amphibious Technologies LLC


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