I fly with the nexus 7 2013 version and have had no issues with app crashing. I completely reboot the tablet then place my tablet in airplane mode, kill all other apps with Zapper task killer. I have zero lag or freezing issues.
My Galaxy S5 has crashed now and then. It's been so hot here (central Florida) I've just assumed it's heat related. Guess I'll only be able to fly this thing in the winter!