I'm a big fan of Grammarly. I have the full membership :)
Man, there's a whole other side of Steemit that I don't know anything about yet, namely, all the discord, chat, guild stuff. I logged onto some discord once or twice, but it was so confusing. Just seemed like a large room with a lot of people talking at the same time.
I too use Grammarly and am also paid for a year of their premium service. I love it, and it has helped me learn what I commonly mess up. However, I still get a human to read my work before I post.