I’m on an iPhone 6 with iOS 11.2.5. The latest release of the game 0.1.1 (42) is crashing on me a lot. I never had this problem with past versions. No particular thing seems to cause it. A crash happened when I was trying to rotate the map. A crash happened when I was trying to collect an ingredient. A crash happened when I clicked a monster. And several occurred when loading the game.
We will release a new build soon. That should solve this :)