I've never used spellcheck or auto-correct; I know better. ;~) If I am truly unsure of the correct spelling of a word (a rarity, I'll admit), I look it up in a fucking dictionary. If that makes me sound like an ass, at least I don't look like one when spellcheck or auto-correct is invariably wrong, wrong wrong.
But then, I also do math without a calculator. heh.
Why, yes, I AM a dinosaur. (see my avatar)