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Just purchased and installed full version on Google Nexus 7 (second generation). Works so far, but have the following questions / suggestions.
My first attempt was to lie the tablet flat on the table (screen is horizontal) with the app screen locked to Landscape mode. Calibrated to zero. Pitch worked by rotating the tablet on its long edge, but there was no change of reading when it is rotated on its short side. When I orient the tablet with its screen vertical (as it it was mounted on the face of a vehicle dashboard) then it reacts as expected. If I lock the screen in Portrait orientation, then it works on both axes as expected when its in the flat orientation. I had intended to mount the tablet in a flat orientation, so I found this behavior somewhat confusing.
I did a test with data logging set to 1 second interval and GPS Refresh set to 2 m and 120 seconds. The application that I have in mind for this software requires the 2 m precision and frequent readings. When I export the CSV after walking around my property (within an area about 15 m x 8 m), all the Lat/Long are identical to 7 decimals of precision. I am not sure whether the data was recorded incorrectly (how many decimal degrees are required for 2 m at 49 North Latitude?) or a GPS refresh was not triggered because of the 120 second setting. Either way, some additional clarity on the refresh items would be helpful.
Glad I found this app!! Was searching extensively to find this capability. Thanks!