QuillBot will have to have been probably the most practical author's companion app I have ever attempted. Amazing tool, gives you Grammar Checker, Paraphraser, and Summarizer. GC was especially useful as I am not a local speaker. It even suggests you paraphrase soon after error checking. This is often skillfully https://www.linkedin.com/pulse/my-unbiased-review-quillbot-comparison-pros-cons-ali-nouasri