Linguisoft (www.linguisoft.com) has released Grammarian PRO3 X, an upgrade of the grammar, spelling, AutoCorrect, and AutoType proofreading application for macOS.
It’s an interactive spell and grammar checking, dictionary, thesaurus, AutoCorrect, and AutoType tool that works within every program on the Mac. Sporting a new redesigned user interface, this new version is now 64-bit and macOS Catalina-ready.
Grammarian PRO3 X requires macOS 10.6.8 or later. It retails for $46 for two weeks only; after that the price is $59.95.