Can't play the game

After downloading the new update, I can't load my old world as it crashed. I created a new world and it also crashed. I tried on my sister's device (a iPad 2 with IOS 9.3.5 MCPE 0.16.0) it also crashed. Pls fix soon.
*Before it crashed it would stay at the loading screen for a long time before crashing out of the game. Hope this helps