Grammarian PRO3
What Grammarian PRO3 is
Grammarian PRO3 is a macOS desktop grammar checker for professional writers. It reviews grammar, spelling, punctuation, style, and phrase usage, with styles such as Chicago, APA, Associated Press, academic, business, casual, formal, legal, personal, and technical. The app works in word processors, email applications, web browsers, and other Mac apps where text can be entered, though it has no browser extension. Writing tools include AutoType, AutoCorrect, AutoComplete, a dictionary, thesaurus, and writing statistics. Spelling can be checked in up to 17 languages simultaneously. The app works offline, does not collect text data, and does not send text or data over the internet. Linguisoft says it does not use generative AI to revise or edit. After a seven-day full demo, the free service limits grammar, punctuation, and phrase corrections and allows one writing style. Paid options include Premium at $59.99 a month billed annually and Grammarian PRO3 Premium at $49.99, paid once. macOS 10.13 or later is required.
Who it suits
It suits Mac-based professional writers, students, educators, job applicants, business writers, authors, and copywriters. Users wanting offline checking and multiple writing styles may find its approach suitable.
What it does well
- Checks grammar, spelling, punctuation, and style
- Works across many Mac text-entry applications
- Supports up to 17 spelling languages
- Offline operation without text transmission
- Includes dictionary, thesaurus, and writing statistics
What to know first
- Available only for macOS
- No browser extension
- Free service has limited corrections and one style
- Phone support is not offered
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Premium | billed annually · Unlimited grammar, spelling, punctuation, and style checking · Advanced suggestions · Unlimited writing styles · AutoComplete, AutoCorrect, and AutoType | $59.99 a month |
| Grammarian PRO3 Premium | Billed as a payment of $49.99 · Unlimited grammar, spelling, punctuation, and style checking · Unlimited writing styles · AutoComplete, AutoCorrect, AutoType · Dictionary lookup | $49.99, paid once |
As linguisoft.com lists them, read 21 Sept 2026. The maker's own page has the final word.
Verdict
Grammarian PRO3 offers broad Mac writing checks, offline privacy, and extensive style options. The free tier is limited, while paid access starts with the listed Premium choices.
Facts from Grammarian PRO3's own pages
- AI
- The maker says Grammarian PRO3 does not use generative AI to revise or edit. · linguisoft.com, 9 Oct 2026
- App integration
- The maker says the checker works in word processors, email apps, web browsers, and other Mac apps where text can be entered. · linguisoft.com, 9 Oct 2026
- Browser extension
- No · linguisoft.com, 21 Sept 2026
- Checks
- It checks grammar, spelling, punctuation, style, and phrase usage. · linguisoft.com, 9 Oct 2026
- Company history
- Linguisoft says Grammarian began as Sensible Grammar in 1984 and identifies Gettysburg, Pennsylvania, USA as its location. · linguisoft.com, 9 Oct 2026
- Desktop app
- Yes · linguisoft.com, 21 Sept 2026
- Free plan
- Yes · linguisoft.com, 21 Sept 2026
- Free tier
- After the seven-day full demo, the app provides a free limited service with limited grammar, punctuation, and phrase-usage corrections and one writing style. · linguisoft.com, 9 Oct 2026
- Intended users
- The maker describes the product for professional writers and gives students, educators, job applicants, business writers, authors, and copywriters as examples. · linguisoft.com, 9 Oct 2026
- Languages
- The maker says spelling can be checked in up to 17 languages simultaneously. · linguisoft.com, 9 Oct 2026
- Offline privacy
- The maker says the app works offline, does not collect text data, and does not send text or data over the internet. · linguisoft.com, 9 Oct 2026
- Purpose
- Grammarian PRO3 is a Mac grammar checker for professional writers. · linguisoft.com, 9 Oct 2026
- Style suggestions
- Yes · linguisoft.com, 21 Sept 2026
- Support
- Support is available by email or web form, and the app includes a built-in manual; the maker says it does not offer phone support. · linguisoft.com, 9 Oct 2026
- System requirements
- The download page lists macOS 10.13 or later and Intel or Apple M-series 64-bit processors. · linguisoft.com, 9 Oct 2026
- Writing styles
- The site lists Chicago, APA, Associated Press, academic, business, casual, chat, common, formal, legal, personal, and technical writing styles. · linguisoft.com, 9 Oct 2026
- Writing tools
- Features include AutoType, AutoCorrect, AutoComplete, a dictionary, a thesaurus, and writing statistics. · linguisoft.com, 9 Oct 2026
Where Grammarian PRO3 stands on Freedom251
- Grammar checkers#65 of 88