My older Samsung Tab would not download the FlyApp at all.
So, went with a Lenovo M10 and it has worked pretty decent. Nice big screen, but in bright sunlight - like most any device - it is harder to see. Look at the specs for NITS and the higher the better. Mine is 330, which others have mentioned is somewhat low and a visor will help in that regard. Just another bulky add-on I prefer not to have, so I seek out a shady spot for the tablet and myself.
Only issue I seem to have with the FlyApp on the Lenovo is after a flight, if I swap batteries after closing down the RC, drone, and FlyApp - when I bring everything back up - no camera view on screen. Completely blank / dark. Thus having to reboot the tablet and getting FlyApp up and running - which seems to be fine. So, a simple remedy for me is once I land the drone, reboot the tablet, and by the time I'm ready to fly again, the tablet is up and refreshed - ready to fly.
If anyone has experienced same issues with other Android tablets - what did you do to fix the issue?