Fixkey is an AI-powered writing assistant designed specifically for macOS that aims to streamline business communication by automating routine writing tasks and ensuring consistent, error-free content. It offers features like instant grammar correction with customizable shortcuts, support for over 200 languages, and compatibility with over 300 applications. The tool also provides dictation using offline Whisper models and employs offline models fine-tuned for grammar fixing. Users might want to use Fixkey to save time on editing, maintain brand voice across various platforms, and enhance productivity by focusing on conveying ideas rather than worrying about typos or grammatical errors. Testimonials suggest it significantly improves the writing process, making it a potential game-changer for professionals who frequently write for outreach or content creation.