PowerPen is an AI paraphrasing and proofreading tool that utilizes GPT AI technology to rephrase, fix grammar and spelling errors, and improve language style. It offers features such as tone and language selection, summarization, and text length adjustment. The app is designed to assist professionals, students, and anyone who wants to improve their writing skills. PowerPen is a free app with no pricing information available. Data safety and privacy policies are discussed and can be updated over time.