Chosen Solution

I dropped my phone on concrete and accidentally put a crack in it. I was wondering if the crack will spread if I drop it again with a case on or if it will spread at all.

Case or no case, it’ll still spread. The only thing that will stop the spread, drop or no drop, is a tempered glass screen protector. I dunno if iFixit..has..one… Doesn’t look like they do, and I can only find ones that have both. Which is probably a good idea https://www.googleadservices.com/pagead/