Grammarly offered a 7 day free trial. I cancelled on the 6th day of a one year subscription [which incidentally was almost double for what I pay for MS Windows or Office. They told me that I needed to contact another department. By that time I had gone past the expiration date and they charged me almost $160+, a full year's subscription, when I complained they reduced it to $29.95. It's not much better than the free edition that comes with MS Office.