Sometimes, I first type my posts in compose mail (email). It has a spellcheck. But it doesn't get the words that are spelled *write* but used wrong or the words that should be combined (grammatical errors). I find that as I age my spelling gets worse. And I've learned that I type phonetically. If I'm thinking *to*, I may type two or too; or their, they're, there; so on and so forth.
I'm not trying to write a paper for school; so hopefully, no one's grading me!