Grammarly is a wonderful application, the way it works on my projects amazes me greatly, it is simply unbelievable!
It instantly corrects all of my grammar errors and checks for plagiarism with superb ease, in fact, it is the best proofreader I have ever used. As an author, I strongly recommend it for use to anyone who needs help in writing and of course, everyone does. To me, Grammarly is an "A" app.