Precision GPS Free

Precision GPS Free


(3 stars)


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10,000 - 50,000 downloads

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'Precision GPS Free' uses your device's GPS sensor to measure your location more accurately than is possible with typical GPS apps. Turn your phone or tablet into a precision GPS instrument.

Normally, software on your Android device determines your location from individual GPS readings. This is fine if your are interested in getting your location to within about 10 meters. However, it is possible to do better than this if you average many readings at a particular location.

This app is designed to do just that -- average many readings of a stationary Android device to get a more accurate location; it actually calculates a weighted average, accounting for the accuracy of each reading. The trade-off is time. You will need to wait a least a few minutes to get a high accuracy average location.

'Precision GPS Free' displays the following information on the main screen:

-'start/stop' button,
-'reset' button,
-battery power remaining as percentage,
-current latitude and longitude,
-round number,
-elapsed time,
-number of GPS satellites in view,
-number of GPS satellites employed in fixing location,
-signal-to-noise ratio of signal from each satellite,
-accuracy of the current readings,
-weighted average (mean) latitude and longitude,
-graph of the current latitude and longitude (white connected points) and the average value (red dot),
-bounding 'scale box' (green) around mean position with a width and a height of 2 meters.

The reset button is inactive while readings are being taken. It can be used after the 'stop' button is pressed. If the measurements are stopped and then started again without pressing the reset button, then only the 'elapsed time' value is reset.

The latitude and longitude values are shown on the graph. North is towards the top and east is toward the right, as in a map. The graph automatically rescales to include the extreme values of longitude and latitude each time it updates the graph (every four seconds). The green scale box is not always square in shape, since the graph latitude scale is not necessarily the same as the graph scale in longitude.

The app times out after 30 seconds if the device cannot get a satellite fix.

A 'settings' screen provides an option to keep the screen continuously on while the app is running.

Localization language support is provided for French, German, and Spanish.

Applications of 'Precision GPS Free' include navigation, geocaching, prospecting, emergencies, surveying a property, observational astronomy, and archaeology.

A pro version of this app is also available, called 'Precision GPS Pro'. It adds elevation and HDOP, PDOP, VDOP data and options to save the location (and copy to the clipboard), change the interval that readings are taken, display UTM coordinates, display a sky map of the active satellite positions, run in the background, change the format of the coordinates, and send the average coordinates to a mapping app, such as 'Google Maps.' The pro version is also ad-free.

If you have any suggestions for improvements or problem reports, please contact us at

Tags: gps cordinates precision in, gps coordinates high accuracy, pdop graph, precision gps, how to use free precision gps.

Recently changed in this version

1.4 - fixed problem with back button. Fixed problem with app initializing after returning from lock-screen if device is rotated to landscape mode. Plus, several UI adjustments.
1.5 - added remaining battery power reading
1.6 - added localization for French, German and Spanish. Made several more UI adjustments.
1.7 - minor bug fix plus additional UI adjustments.
1.8 - changed exit. UI adjustments.

Screenshots Precision GPS Free
View bigger - Precision GPS Free for Android screenshot
View bigger - Precision GPS Free for Android screenshot
Comments and ratings for Precision GPS Free
  • (46 stars)

    by Gino Arevalo on 15/08/2014


  • (46 stars)

    by Michael pivola III on 27/05/2014

    Great app but for novice gps'ers is all but useless because ther are things like coordinats. That cannot be used in all cases.

  • (46 stars)

    by John Charlton on 07/03/2014

  • (46 stars)

    by keling pukimak on 12/02/2014

  • (46 stars)

    by David Owings on 05/11/2013

    This has made my goods on my phone more accurate then any other app.

  • (46 stars)

    by Jaciel Melnik on 18/09/2013

    The message: "Failed to get fix!" appears every time I try to measure my location. I'm using a Nexus 4 and I'm in Brazil.

  • (46 stars)

    by Anthony Tutor on 28/07/2013


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