While writers can similarly strengthen their skills with Grammarly, ProWritingAid is a sentence rephraser in addition to pointing out spelling mistakes. ProWritingAid tracks user writing habits over time to produce detailed reports that not only help you fix mistakes in the present but become a stronger writer. ProWritingAid offers advice on readability and sentence structure all for free. The free version of ProWritingAid goes beyond that of Grammarly, which notifies users that they will have access to advanced grammar suggestions if they sign up for the premium plan. The basic spelling and grammar suggestions work quite similarly. Making the switch from Grammarly to ProWritingAid is pretty seamless. Those people who rely heavily on Google Docs can integrate ProWritingAid directly, and the same goes for Microsoft Office users. There are writing apps for users on both Mac and Windows as well. But ProWritingAid is also available for Safari users. Like Grammarly, ProWritingAid has both a Firefox and Chrome extension. The Best Alternative to Grammarly Plagiarism Checker The Best All-Around Grammarly Alternative