Precision GPS Pro
$1.10
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About Precision GPS Pro
'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.
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 ggonzo47@gmail.com.
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 ggonzo47@gmail.com.
All Application Badges
Paid
app
app
Android
2.3+
2.3+
Bug
buster
buster
Android app
App History & Updates
What's Changed
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.
3.1 - fixed problem with menu on newer devices. Other improvements.
3.2 - added a third format option for displayed coordinates.
3.3 - fixed satellite SNR bars display issue.
3.4 - fixed font size issue with larger devices.
3.5 - fixed more font size issues.
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.
3.1 - fixed problem with menu on newer devices. Other improvements.
3.2 - added a third format option for displayed coordinates.
3.3 - fixed satellite SNR bars display issue.
3.4 - fixed font size issue with larger devices.
3.5 - fixed more font size issues.
Price update Price changed from $1.08 to $1.10.
Version update Precision GPS Pro was updated to version 3.5
Price update Price changed from $0.73 to $1.08.
More downloads Precision GPS Pro reached 1 000 - 5 000 downloads
What are users saying about Precision GPS Pro
I
by I####:
by I####:
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.
G
by G####:
by G####:
It does what it promises. But it has a bad UI on saving and labelling the coordinates.
T
by T####:
by T####:
Works like a champ.
R
by R####:
by R####:
Useful, wish I could simply copy location values directly to clipboard without bundling with history
S
by S####:
by S####:
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...
R
by R####:
by R####:
A very interesting app.
D
by D####:
by D####:
I just bought the Pro version 3.0. I am unable to access the settings page (shown in the app pre purchase info) so I can't change the units to the one I want. If they don't fix this and release a new version that works correctly I will be seeking my money back.
B
by B####:
by B####:
The free version works for me but the pro version has a serious bug. The averaged coodidates it gives are complete garbage. Not even close by 1000 miles! Please fix soon!
M
by M####:
by M####:
Keeps droping the following error. Error in stub: Java.long.numberFormat Exception: invalid double "" will not work after this.
J
by J####:
by J####:
I'm very impressed with this app so far; I haven't spent very much time with it yet. It would be even better if I could figure out how to make it plot and label a saved series of found locations on a map.
S
by S####:
by S####:
Very glad to get accuracy estimates on GPS readings.
S
by S####:
by S####:
Made my GPS not work any more after installing.
W
by W####:
by W####:
Computed mean will go crazy sometimes
S
by S####:
by S####:
Very accurate
E
by E####:
by E####:
Virtually the same as others. My 2003 PocketPC used a "program" to average GPS to 6 inches. I would move the Bluetooth sensor around 1ft tiles and see indicated change within half tile.
L
by L####:
by L####:
Can't get repeatable results better than 10 foot radius using either moto x or LG gpad devices. Elevation is off by 100 feet. On gpad there is no obvious way to get to settings or help. Sending coordinates to map app often results in zero latitude and longitude values being received by google maps. Have tried letting it run for as much as 40 minutes with no improvement in accuracy. Testing at 47 north on a clear day with lots of satellites in view.
J
by J####:
by J####:
A brilliant piece of work. Finally a workaround for the gross inaccuracies of standard GPS. You just have to give it some time to do its thing and zero in on where you are.
X
by X####:
by X####:
Very accurate
X
by X####:
by X####:
Helps me accurately locate assets, OK it won't replace a $3000 GPS but your not paying that much :)
Y
by Y####:
by Y####:
Small issues on LG G3. Icon scaling need tweaks.
Y
by Y####:
by Y####:
Precision GPS
X
by X####:
by X####:
I was looking for something to capture gps data to try to locate a place on the property to put a receiving site for a internet connection, I needed some accurate GPS info, I was looking for something that would allow me to capture the gps data into a CVS file and then run a average on it, but this does it all for me, what great app!!. Now I can also go out and check the bench marks on the property and see just how accurate they are.
Z
by Z####:
by Z####:
Good, precise and useful. Thanks.
O
by O####:
by O####:
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 :-/
T
by T####:
by T####:
I am enthusiastic how precise my positioning works. After 10 minutes my measured coordinates came 50 cm close to reality. Impressive!!!
V
by V####:
by V####:
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.
Z
by Z####:
by Z####:
Great does exactly what I need
Z
by Z####:
by Z####:
This is the kind of app l need. Thanks
N
by N####:
by N####:
Very useful app to locate a place even in a very remote area.
Z
by Z####:
by Z####:
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...
Q
by Q####:
by Q####:
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?
by Y####:
Computed mean will go crazy sometimes