macOS Native · Private · Free

AI Grammar Checker for Mac
Native, Private, and Smart

NotchTutor is built for Mac from the ground up — not a browser extension ported to desktop. System-wide grammar checking that explains every fix, tracks your patterns, and keeps your writing completely private.

Download Free for Mac

What "native Mac app" actually means for grammar checking

Most grammar tools are web apps with a desktop shortcut. NotchTutor is different — it integrates at the operating system level for an experience that browser-based tools simply can't match.

Works in every app, not just browsers

Mail.app, Pages, TextEdit, Notion, Slack, VS Code, Notes — NotchTutor checks your grammar wherever you type on your Mac, with no extensions, no switching tabs, no copy-pasting.

No internet required for corrections

Processing happens locally on your Mac. NotchTutor works fully offline — no cloud dependency means corrections are instantaneous and available whether or not you're connected.

Lives in the notch bar

On MacBook Pros with the display notch, NotchTutor tucks into the notch bar — always accessible, never in the way. Trigger a grammar check without leaving your current window.

Lightweight and fast

A native app uses Mac system resources efficiently. No Electron overhead, no background web processes. NotchTutor starts instantly and runs without noticeable impact on battery or performance.

Your writing stays on your Mac. Full stop.

Most AI grammar tools send your text to a server to analyse it. NotchTutor does not. We process everything on your device — no accounts, no tracking, no data collection.

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No text transmission

Your drafts, emails, and documents are never sent to an external server. The AI runs on your Mac.

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No account required

Download, install, and use NotchTutor without creating an account or providing any personal information.

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No usage tracking

NotchTutor does not monitor what you write, how often you write, or what suggestions you accept.

Privacy matters most when writing matters most. See how we help with professional grammar checking for client communications and confidential work. Also read about why writers repeat the same mistakes .

AI grammar intelligence, not just autocorrect

NotchTutor's AI catches what spellcheck misses and goes further than rule-based grammar checkers.

Grammar & structure

✓ Subject-verb agreement errors
✓ Incorrect tense usage
✓ Misplaced modifiers
✓ Run-on sentences and comma splices

Vocabulary & word choice

✓ Redundant phrases ("revert back", "future plans")
✓ Wrong prepositions ("discuss about" → "discuss")
✓ Incorrect word forms ("I am agree" → "I agree")
✓ Overly complex phrasing that obscures meaning

Professional tone

✓ Informal language in formal contexts
✓ Passive voice overuse
✓ Hedging language that weakens your message
✓ Punctuation that affects readability

Learn about the most impactful errors: Common grammar mistakes professionals make and how to fix them permanently. Also explore our guide on learning from grammar mistakes .

Frequently asked questions

What makes NotchTutor a native Mac grammar checker?

NotchTutor is built as a native macOS app — not a browser extension or web wrapper. It integrates with the operating system directly, working inside Mail, Pages, Notion, Slack, and any other app on your Mac. This means no copy-pasting and no tab-switching: grammar help appears right where you're writing.

Does NotchTutor work in Safari and Chrome on Mac?

Yes. As a system-wide Mac app, NotchTutor operates inside browser text fields too — Google Docs, web-based email clients, CMS editors, and more. No browser extension required.

Is NotchTutor free for Mac?

Yes. NotchTutor is free to download and use on macOS. The core features — real-time grammar checking, explanations, and mistake pattern tracking — are all available at no cost.

Does NotchTutor send my text to the cloud?

No. All text processing happens locally on your Mac. Your writing never leaves your device. This is a deliberate design decision — NotchTutor provides a fully private grammar checking experience, unlike cloud-based tools that transmit your text to remote servers.

Which macOS versions does NotchTutor support?

NotchTutor supports macOS Ventura and later, including Sonoma and Sequoia. The notch bar integration is available on Macs with the notch display (MacBook Pro 14" and 16" from 2021 onwards, and MacBook Pro 14" M4 and later).

How is a native Mac grammar checker different from Grammarly's Mac app?

Grammarly's macOS app uses a keyboard extension that covers browsers and some native apps, but relies on cloud processing and requires an internet connection. NotchTutor runs fully on-device — no text ever leaves your Mac.

The grammar checker your Mac deserves

Native macOS. Zero cloud dependency. Free. Download NotchTutor and experience grammar checking built for the platform you actually use.

Download Free for Mac