iPhone Screenshots


Calculates the Magnetic Declination for any point on earth.

Magnetic declination is the degree difference between true north and magnetic north. It's important to know the declination of your area if you are using a magnetic compass, so you can navigate to true north.


- Use your GPS location to find the declination for your current position

- Select from a database of 50,000 world cities

- Enter a custom location if you know the exact GPS coordinates.

- The app also stores your recently used locations so you can quickly return to past locations.

A positive declination indicates that magnetic north is east of true north. A negative declination indicates that magnetic north is west of true north.

What's New

Version 1.2

Easier to tap the most essential button in the app.

Ratings and Reviews

2.5 out of 5

10 Ratings

10 Ratings

Great app for Adjusting Handheld compasses


This is a useful and wonderful app to adjust your handheld compass from magnetic north to true north. Especially I find it very useful to adjust my Brunton Pocket Transits for doing geological work in the field.

Need Immediate Update: iOS 11

Blade Grinder

Cannot find any way to contact developer. I keep getting reminders to have this updated but it cannot be done apparently. 7 years since last update? C’mon, what gives? And by the way, my version still shows the earth is flat and places on the map/info reads: “Here be Monsters.”

Wants excessive permissions


Nice app but only works if access to my location is granted "always", "even when not using the app" which is entirely unnecessary.


Daniel Vincent
1.9 MB
Requires iOS 3.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, French, Italian, Japanese, Korean, Portuguese, Spanish
Age Rating
Rated 4+
© 2009 Kekoa Vincent


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer

You May Also Like