Refine

Refine provides grammar checking directly on macOS without any network connection, using locally hosted AI models to analyze text as it is typed. The tool works in the background of a wide range of applications, delivering inline, context‑aware suggestions and explanations for each correction, so users can see why a change is recommended and learn from it. Because all processing stays on the device, no data is uploaded, ensuring privacy and allowing the service to function offline and instantly.

The software supports multiple languages, including English, German, French, Spanish, Portuguese, and Chinese, and can translate words or phrases written in the user’s native language into the target language without interrupting the writing flow. It integrates with popular macOS apps such as Mail, Safari, Chrome, Pages, Word, Slack, Notion, and many others, requiring no additional setup beyond installation.

Targeted at writers, students, and professionals who need reliable, private grammar assistance on a Mac, Refine distinguishes itself by combining offline operation, multilingual capability, and explanatory feedback in a single, always‑available package.