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!
Support for 2015 WMM (World Magnetic Model) for more accurate values until 2020.
Ratings and Reviews
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?
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.
Does not give direction of declination.
The direction of declination is not supplied with the calculation. The calculation was correct to 1/100th of a degree, so the math is correct, but which direction to apply it to your compass? Ad space is above display of calculated values, should be anchored to bottom of screen so it's not so annoying. Seems like a work in progress, not a released product.
With Family Sharing set up, up to six family members can use this app.