I've been doing some testing and on my iPhone 6 (120gb) it seems like the crashiness increases directly with the number of explorers.


Less than 10 explorers I can't make it crash.

10-20 Rare

20-40 Less rare

40-60 Easy to crash by swiping thru explorers and text

60-75 Occasional crash upon opening from sleep

75+ Crashes often, sometimes just by tapping on the Wasteland.


I keep it around 170 dwellers depening on how many Level 1's are on a death march.