I was about to post the question but then I saw it on Stack Overflow while searching for auto-correct possibilities. The linked question has no answers, so I thought it'd have more luck on this site. Here's the text:
I wish there were a way so that when I mistype a word, flyspell could autocorrect it to the "most likely" correction. When I mistype a word and then hit OPTION-TAB to correct it, flyspell ALMOST ALWAYS picks the correct correction by default as the main suggestion.
However, I want flyspell to do this with every word I mistype, WITHOUT my having to hit OPTION-TAB. Just from hitting the SPACE bar and moving on to the next word.
Is this possible?
So basically something like auto-correct on mobile phones. Such a feature would be useful to have for modes like
I'd rather have this feature as a separate minor mode than overwriting the default fly-spell functionality. It could be activated in addition or instead of fly-spell when needed