https://refine.sh

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Grammar checking that respects your privacy

Your writing assistant that never leaves your Mac. Powered by local
AI models with zero data collection.

Download for Mac
Join Windows/Linux Waitlist

v1.0

macOS 14+

Full-featured 7-day free trial

Privacy first, always

Your writing stays on your Mac

Unlike cloud-based tools, Refine processes everything locally using
advanced AI models.

Zero Data Collection.
    Your documents never leave your Mac. No servers, no tracking, no
    privacy concerns.
Lightning Fast.
    Local processing means instant results without internet
    dependency or delays.
Always Available.
    Works offline, on flights, in coffee shops, anywhere you write.

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Works everywhere you write

Seamlessly integrates with all your favorite Mac applications. No
setup required - just start writing and get grammar suggestions.

Messages app
Messages
Mail app
Mail
Safari browser
Safari
Chrome browser
Chrome
Pages app
Pages
Microsoft Word
Word
Slack app
Slack
Notion app
Notion
Notes app
Notes
Bear app
Bear
Ulysses app
Ulysses
Discord app
Discord

And many more applications across macOS

Simple, honest pricing

Own it forever. No subscriptions, no hidden fees.

One-Time License

One-time purchase for major version updates and support.

What's included

  * AI-powered writing refinement
  * Lightning-fast local processing
  * Works offline anywhere
  * 3 devices per license

Pay once, own it forever

Launch Month - 50% off

$30$15USD

Purchase a License

Try it before you buy! Download the free trial version to see if it
fits your needs.

Frequently asked questions

Can't find the answer you're looking for? Feel free to sent us an
email at support@refine.sh

Is my data truly private?
    Yes, absolutely. Your documents, text, and writing never leave
    your Mac. We don't collect, store, or transmit any of your
    personal content. All processing happens locally using offline
    large language models (LLMs) that run directly on your machine.
What apps does it work with?
    Works with most macOS apps including Mail, Messages, Safari,
    Chrome, Pages, Word, Slack, Notion, and many more.
What about system requirements?
    Requires macOS 14.0 or later. Works with both Apple Silicon (M1,
    M2, etc.) and Intel-based Macs
Is there a free trial?
    We offer a 7-day free trial with full access to all features. No
    credit card required. Just download the app and start using it.
Is there an educational discount?
    Yes! We offer a 50% discount for students and educators. Just
    write us an email with your current student/teacher/institution
    email.

Ready to protect your privacy while improving your writing?

Download for Mac
Join Windows/Linux Waitlist

v1.0

macOS 14+

Full-featured 7-day free trial

(c) 2025 Runju Huang. All rights reserved.

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