Do cracks on an iphone spread?

I cracked my phone a little and i ordered and otterbox and a screen protector so itll be safe. The crack is small and in the top right corner. It goes a little on my screen but its at the top. Just wondering, will the crack spread even with the case and a screen protector? I really don't want a repair.

Perhaps, depends on the stresses in the glass with the crack. It's never a great thing to have a crack. It probably won't happen too fast though - by the time it gets in the way, I suspect it wlll time for a new phone anyway.

If you drop it again, it will