PowerPen

https://play.google.com/store/apps/details?id=com.sageai.powerpen

PowerPen AI Paraphrasing Tool is a comprehensive text editing tool that allows users to easily alter the language style, tone, and length of any text, while providing grammar, spelling, and punctuation checking capabilities. It can be used to compose responses to emails, tweets, and other social media messages, as well as to summarize long pieces of text.