Which iOS? Some reports of iOS prior to 11.2 (Newest one out now.) were crashing. I suspect a 11.2.1 will be out soon too as it was a major download and install for me, and it wanted credit card info for some Apple Pay thing.
+1 to the crashing. iPad Pro 9.7 latest go4 never crashed before. Now it was giving a “cpu resource low” in go4. Reset iPad and reinstalled go4. Better now.