Refine
Refine
AI-powered offline grammar checker and writing refinement tool for Mac.
About Refine
Refine is a local-first macOS app that provides AI-powered grammar checking, writing refinement, and style customization — all processed offline on your Mac. Create custom prompts for professional emails, academic writing, creative writing, and more. Supports BYOK for advanced cloud models with keys stored securely in system keychain.
Key Features
Offline AI Processing
Lightning-fast local AI handles most writing tasks completely offline. Works anywhere without internet connection.
Custom Writing Styles
Create and save unlimited custom prompts for professional emails, academic papers, creative stories, technical docs, and social media.
Bring Your Own Key
Connect OpenAI, Anthropic, or Google API keys for advanced models. Keys stored in system keychain, never on our servers.
Works Across Apps
Refine text in any Mac app with a global shortcut. No need to copy-paste into a separate editor.
System Requirements
macOS 13+ · Apple Silicon & Intel
