Kerlig is an innovative AI writing assistant tailored for macOS users. By enabling in-context editing, it allows you to select text within any app and apply various enhancements, such as correcting spelling errors, changing tone, summarizing content, translating languages, and engaging with PDFs and documents. This tool empowers you to craft compelling messages, optimize your writing, and communicate effectively without leaving your current application, making it a versatile asset for professionals and casual users alike.