Selecting a compatible tablet for drone controller

I recently received my Gladius Mini S, made one dive with it so far with good results, considering never had a drone before.

After playing a round with it for a few days and trying to figure out exactly what all of the functions are and how they work I decided that I would get an inexpensive tablet. My cell phone is a little too small and was afraid of it going in the water.

The first tablet didn't have GPS capability. The specs seamed imply that it did. was able to return it. The second tablet has GPS capability but I cannot calibrate it to get the high precision that is needed to align the controller position with the ROV position, i.e. the ROV icon on the tablet does not show correct orientation to the tablet.

This all works fine when I use my phone. I guess the wife is getting the tablet. ;-)