I am looking for an android app able to log GPS data like coordinates, altitude, current speed and would be nice if also the GPS accuracy/number of satellites. Many GPS apps are able to display these data, but not to log them.
Reason is that while doing a monitoring (no matter if helicopter, car or on foot), there is a variable accuracy of the coordinates and so this also influences the measurement results and the output maps. So it would be helpful to know these data to take this into consideration.
I am currently using Oruxmaps, but it logs only date/time, position and elevation and not the other data. Just found Antimap and Geopaparazzi which I will surely try, but I am after other recommendations.
I also need to work in offline mode.