Coordinate Master

Coordinate Master

The most comprehensive coordinate converter tool available for Android!

App info


8.5
May 12, 2025
1,951
$3.49
Android 4.0+
Everyone
Get it on Google Play

App description


Android App Analysis and Review: Coordinate Master, Developed by BinaryEarth. Listed in Tools Category. Current Version Is 8.5, Updated On 12/05/2025 . According to users reviews on Google Play: Coordinate Master. Achieved Over 2 thousand Installs. Coordinate Master Currently Has 43 Reviews, Average Rating 4.7 Stars

This powerful geodesy app allows you to convert coordinates between many of the world's coordinate systems, compute geoid offsets, and estimate the current or historic magnetic field for any location. It also includes a calculator tool as well as surveying tools to compute the point scale factor, grid convergence, traverse, inverse, and sun angle. You can also store multiple points and compute boundary length and area on them, or import/export them to CSV files.


The app uses the PROJ4 library and a lookup file containing projection and datum parameters to support over 1700 coordinate systems. Lat/lon, UTM, US coordinate systems (including US State Plane), Australian coordinate systems (including GDA2020), UK coordinate systems (including Ordinance Survey) and many, many others are supported. You can also create your own coordinate systems if you know the parameters.The app also supports affine transformations to allow you to set up local grid systems. See http://www.binaryearth.net/Miscellaneous/affine.html for details.


The app either takes manual coordinate input or uses your current GPS location. The computed location can be displayed in Google Maps via your web browser with a single button press. It also supports MGRS grid references.


You can export any lat/lon, UTM or transverse Mercator coordinate systems to a HandyGPS datum (.hgd) file for use as a custom datum in HandyGPS.


The magnetic field calculator page computes the Earth's current or historical magnetic field at a given location. The magnetic declination computed is useful for compass navigation since it represents the difference between true north and magnetic north. Field inclination and total intensity are also computed. This tool uses the International Geomagnetic Reference Field model (IGRF-13). See http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html for full details. Years from 1900 through to 2025 are supported.


The app can also compute the geoid height offset for a given location, using the EGM96 model. Geoid offset can be subtracted from the height reported by GPS to give your actual height above sea level.


The app also includes a sun angle calculator which can be used to compute the location of the sun in the sky at any location for any date and time.


Online help for the app is available at http://www.binaryearth.net/CoordinateMasterHelp


A version of this app which allows batch coordinate conversions is now available for Windows. See http://www.binaryearth.net/CoordinateMaster/Windows


Permissions required: (1) GPS - to determine your location, (2) SD card access - to read and write user projections file.

What's New


8.5: Made map zoom less sensitive.
8.4: Labelled the "Select all" checkbox at top of point list for clarity.
8.3: When exporting points list to CSV, include both the "from" and "to" coordinates, as well as lat/lon. Added a button to email the points list as a CSV file.
8.2: Updated calculator tool.
8.1: Updated to target Android SDK 34.
8.0: Updated to target Android SDK 33.
7.9: Updated to target Android SDK 31.
7.8: Fixed a bug related to coordinate systems with a spherical ellipsoid.

Rate and review on Google Play store


4.7
43 total
5 78.6
4 14.3
3 7.1
2 0
1 0

Total number of installs (*estimated)

Estimation of total number of installs on Google Play, Approximated from number of ratings and install bounds achieved on Google Play.

Recent Comments

user
Matt Cunningham

Fantastic. If you need to perform conversions between different coordinate systems accurately & faithfully, this app is simply the best. The list of supported systems is immense, and the calculations are reliable - unlike some converters using simplified translations, resulting in degraded accuracy. This app is quite niche, which might explain why it hasn't received the wider acclaim it deserves. EDIT: I wished for a very minor, quite niche feature. Within days, the dev added it. Awesome! 👌

user
Amir Siahy

It's a great app. The only defect which made me to give it 4 stars, is the old gingerbread era GUI design. If it's not make too trouble, dear developers please concern the material design guidelines in new user interface.

user
A Google user

This is the only android app I've ever found that can compute UTM grid convergence (for setting your compass to grid declination, for paper-map navigation). The UX isn't perfect, but IMHO it definitely deserves all 5 stars for having that one critical feature.

user
John Gachugu

Very informative, and I would be grateful if it could show UTM grid coordinates of Northing and Easting, in addition to geodetic coordinates of latitude and longitude.

user
A Google user

Perfect for state plane conversation 👍

user
A Google user

Good job Dev.

user
William Shanks

great app, excellent support, amazing

user
Espen Laub

👍