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Precision GPS Pro

Precision GPS Pro

500 - 1,000 downloads

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'Precision GPS Pro' 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 navigation 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 Pro' displays the following information on the main screen:

-'start/stop' button,
-'reset' button,
-'save' button,
-'email' button,
-'UTM' button,
-remaining battery power readout (%),
-current latitude, longitude and (corrected - see below) elevation,
-round number,
-elapsed time,
-PDOP, HDOP, VDOP values,
-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, longitude and (corrected - see below) elevation,
-graph of the current latitude and longitude (white connected points), the average value (red dot) and a scale box (green),
-'status' of app - either 'Idle', 'waiting, 'searching', or 'working',
-sky plot of active satellite positions,
-option to choose format of displayed coordinates,
-'maps' button to send average coordinates to a mapping app, such as 'Google Maps.'

The 'reset' and 'save' buttons are inactive while readings are being taken. They 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 up and east is to the right, as on a map. The graph automatically rescales to include the extreme values of longitude and latitude each time it updates the graph (every four seconds in fastest data acquisition mode).

The green 'scale box' is 2 meters on a side. It will not always have a square shape, since the graph scaling for latitude is not necessarily the same as the graph scaling for longitude. During the early rounds, sometimes only a portion of the scale box is visible; this occurs when the displayed ranges of latitude and longitude are very small.

The elevation is corrected to the EGM96 geoid. This provides absolute accuracy in elevation just under one meter.

A 'settings' screen provides options to keep the screen continuously on while the app is running, change the interval between measurements (in minutes, with a minimum of 1 minute), choose the language (English, French, Spanish, or German), choose the elevation units (meters or feet), choose whether to allow the app to run in the background, and choose which format to display the coordinates. There is also a button to reset the saved measurements, which can be viewed on the 'history' screen.

When the 'save' button is pressed, the date, time, and average coordinates are also copied to the clipboard, including the history data.

Note, when you change the 'background run' status on the settings screen, you must restart the app for this change to take effect.

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

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

If you have any suggestions for improvements or problem reports, please contact us at ggonzo47@gmail.com.

Tags: precision pro software,  accuracy high, hdop to location accuracy, the relationship between gps hdop and signal to noise ratio, centimeter precise gps coordinates, precise gps sensor, precision gps pro, gps utm high precision, precision location in devices, precision gps.

Recently changed in this version

2.7 - data are now copied to the clipboard (as well as saved) when the 'save' button is pressed. Fixed a bug introduced with the previous update.
2.8 - added a 'maps' button to send average coordinates to a mapping app, such as Google Maps or Google Earth.
2.9 - fixed a bug with a comma appearing in coordinates in some devices.
3.0 - fixed bug that sometimes happened when app was not properly closed. History data is now included in body of email as well as clipboard.


Comments and ratings for Precision GPS Pro
  • (67 stars)

    by Jeremy Knaggs on 10/04/2014

    For some reason this app stops after a few hours of running and doesn't save the result before deciding to close on its own :-/

  • (67 stars)

    by lajos albrecht on 29/03/2014

    Good, precise and useful. Thanks.

  • (67 stars)

    by Jeffrey Dickman on 27/01/2014

    Easy to use an accurate. Give it time to collect the readings. I've stopped using my other App and now use this and now this App. Thank you
    Thanks again.

  • (67 stars)

    by Michael O'Brien on 27/01/2014

    Great does exactly what I need

  • (67 stars)

    by Louis Spahn on 02/01/2014

    This is the kind of app l need. Thanks

  • (67 stars)

    by Ingo Berger on 08/12/2013

    I am enthusiastic how precise my positioning works. After 10 minutes my measured coordinates came 50 cm close to reality. Impressive!!!

  • (67 stars)

    by Klaus Munk Pedersen on 30/10/2013

    Is needing an as accurate as possible positions for mg work, and this app is doing a great job when you not are having a proff differential GPS available...