Perfect Tense VS Fluently Beta

Grammarly - Clear, effective, mistake-free writing everywhere you type.

Fluent - Fluent is a people-based marketing platform that uses real-time, one-to-one interaction to create custom audiences and serve personalized ads that drive performance at scale.

ProWritingAid - For the smarter writer. A grammar checker, style editor, and writing mentor in one package.

Gramara - AI grammar correction with transformers

Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.

Grammar Snob - Markup your friends' iMessages like an English teacher 😁