Precision GPS Pro
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.
No personal information is sent to others without the user's direct actions.
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 [email protected].
Category : Tools
Reviews (26)
I just recently purchased it and first thing it notifies me about that it was made for older version of Android. Last updated in 2015!!!!! Dont purchase it's out of date
Seems to work well. More so if you allow it the 20 min. to aquire numerous readings for the median average.
Not updated since 2015. Warns may not work correctly on startup. Maybe doe works; maybe doesn't.
I would like more projections not just UTM! Look very accurate indeed...
Simply an awesome high-precision GPS app. Get it.
For the price, neat little app even if not updated recently
Excellent app fixing very fast... Very useful
needs to be updated to include 9 pie
Does not work with my Samsung Galaxy 10
Good for averaging gps postion
Can you provide coordinates in format WSG84 Zone 30N (Eastings/Northings)
Use it for geocaching frequently
Does exactly what it says it will!
Wants "older" OS
It helps me on my rescues
Read the short "Info" heading (which is really an operators manual). Exceptionally well thought out interface, though button functions are non-standard (return has no effect, must directory change screens by selection) [not a problem]. Positional Accuracy is only as good as any other GPS accuracy app I've used, with 5 minute averaged PA consistent with an instantaneous fix, not better (which seems impossible, or rather, improbable). But I really like this app anyway: ' clever, useful, functions.
To the developers: if I could reset this thing in the middle of a reading, I think I could get much more accurate data, as much of the uncertainty seems to come from the spam data that comes when it first starts a read. Fix that, a definite five star app, but as it is, I can barely get this thing under 40 m, and for a paid app, that's ridiculous.
I doubt about precision of averaging. Means seems rounded at scale 6. I recorded in video 17 measurements - first average appears after 7-th measurement and is smaller than any individual value...
Does what it says on the tin. Save button was difficult to find on first use, but when new user (me) is not under pressure to Make It Work Now, it's not so hard.
It does what it promises. But it has a bad UI on saving and labelling the coordinates.
Best averaging software I have used on Android, interface is clunky but usable.
I get the following error on starting the app on Samsung Note 2. "An error has occurred in sub: java.lang.Exception: Sub lc_allow was not found. Continue?
Good app, even use it at work, but haven't figured out how to "navigate to", if it has that option.
Have to reinstall it few times.
A very interesting app.
Works well. Gives good visual feedback of the position spread. Capable of reliably producing very accurate (les than 1m) results. The only thing I'd like to see added is the ability to copy the result directly to the clipboard.