GrammarBot is a MacOS app that checks your English grammar and suggests a corrected version, fixing misspelled words, typos, or grammar mistakes. It works with a local AI model, so there's no need for subscriptions or an internet connection.
As a native speaker, I can say that the program is useful even for me. Over time, you can forget some basic rules, but this thing really makes your text more grammatically correct in just a few minutes 👏