Your writing, with fewer mistakes.

It lives in the Services menu, where your text already is.

There's no window to paste into. macOS hands GrammarFix the selection and puts the fix back in the same place, so the text never visits the clipboard.

• Right-clickServices › GrammarFix: Fix Text, on any selection.
• Your own shortcutPick any keys you like in System Settings › Keyboard › Keyboard Shortcuts › Services.
• A second shortcutFix with Instructions asks what you want this time, then fixes.

Editors keep a style sheet. So does GrammarFix.

Write your rules once and every fix follows them. Add rules for particular apps, including whether they get emojis, or give one fix its own request.

An example style sheet

Every fixsaved instructions	Use the Oxford comma. Keep it friendly.
Languageor detect it per text	New Zealand English.
In Mailapp instructions, no emojis	Formal, and no exclamation marks.
In Messagesapp instructions, emojis on	Casual. Leave my lowercase alone.
Just this oncesecond shortcut	Make it shorter.

Your Mac already has Writing Tools. Why pay US$1.99?

Writing Tools is good, and GrammarFix can use the same Apple on-device model. The difference is how few steps a fix takes, and how much of your style it remembers.

Feature	GrammarFix	Apple Writing Tools
Start a fix	Your own shortcut. Or right-click › Services.	Right-click › Writing Tools, then choose an action. Some apps also have a Writing Tools button.
Apply it	Replaced in place. No panel, nothing to confirm. The original stays in Recent Fixes.	Review the changes, then click Done.
Reusable tone	Whatever you describe, like "warm but brief" or "no exclamation marks". Saved once.	Friendly, Professional or Concise.
Rules for every fix	Saved instructions, like "Use the Oxford comma".	Describe it each time.
Rules per app	App instructions: formal in Mail, casual in Messages.	Describe it each time.
Emojis	Your call, per app: one or two in Messages, never in Mail.	Describe it each time.
A one-off request	A second shortcut, then type it.	Describe a change, in the panel.
Model	Your choice: Apple's on-device model, or any model from OpenRouter, Anthropic or OpenAI with your own key.	Apple's models. ChatGPT for Compose.
Macs	macOS 13 or later, Intel or Apple silicon. The on-device model needs Apple Intelligence.	Macs with Apple Intelligence, in supported languages and regions.
Formatting	Kept. Bold, italics, links and fonts stay on the corrected words, in apps that share rich text, such as TextEdit.	Edits the text where it is.
Summaries, new text	Not offered. It fixes what you wrote.	Summarize, Key Points and Compose.
Price	US$1.99, once.	Included with macOS.

They work side by side. Keep Writing Tools for summaries and drafting, and press your shortcut for the everyday fixes.

Where your words go.

This page doesn't track you either. It loads no fonts, scripts or cookies from anyone.

The details you'd ask about.

Leaves alone

Code, web addresses, email addresses, @mentions and #channels stay exactly as you wrote them.

Won't paste

A reply that isn't a fix of your text, such as an answer to a question in it. Your selection stays as it was.

Formatting

Bold, italics, links and fonts stay where they were. Apps that share only plain text, and big rewrites such as translations, get plain text back.

Emojis

Off unless you turn them on, then one or two where they fit and never in formal text. Each app can follow that setting, or always or never get them.

Remembers

Your last 10 fixes, original and corrected, in the menu bar. Forgotten when you quit.

Languages

Fixes text in the language it's written in, including New Zealand, Australian, British, American and Canadian English. It translates only when you ask.

API keys

Kept in your Mac's Keychain and sent only to their own provider.

Cost

US$1.99 once, no subscription. With your own key, your provider bills you for what you use.

1. 1Any app with a Services menu, which includes Mail, Notes, Pages, TextEdit, Safari and most others. Some apps, including many built with Electron, don't have one. ↩
2. 2macOS 26 or later with Apple Intelligence turned on. On other Macs, add a key for OpenRouter, Claude or OpenAI in Settings. ↩