I don't know about you, but my spelling is not the greatest at all times. I also miss things when typing to fast (messing up). I have been using the free Grammarly program/app. This program not only catches spelling errors but also your punctuation mistakes. Like where to put the commas you are never sure about.
Of course there is always the "Premium" version. I do recommend that if you do a lot of reports, and publishing. This app/program will help to keep you on track with the basic's and keep you from plagiarizing, and using incorrect sentence structure and such. I can not afford the premium right now, but I would jump on it if I could. You can get it monthly, quarterly (great for students), and annually (best $$ savings for sure).
I suggest you check out the free issue and if you just LOVE the stress (worrying about if your sentences make grammatical sense) saving benefits then go for the paid program for sure. Click here to learn more.. why wait it's FREE!