Optimize Your Life with AI

AI writing apps

AI tools that check grammar, rewrite sentences and help you draft emails, posts, journals and books in your own voice. We track 5 apps, each checked against official pages with a last-verified date.

A woman relaxes on a gray sofa, typing on a laptop on her lap.

App Free plan Paid from* Platforms Top AI features AI training on your writing Verified
GrammarlyAI writing assistant for clear, confident writing in emails, journals and documents. Yes $12.00/mo iOS, Android, Web, Mac, Windows AI writing assistant and prompts; Full-sentence rewrites and tone adjustments May be used
ProWritingAidGrammar checker and manuscript editor for fiction and nonfiction writers, with AI critiques and rephrasing. Limited $10.00/mo Web, Mac, Windows Rephrase and Sparks AI suggestions; Chapter Critique AI story feedback Not used
QuillBotAI paraphraser, grammar checker and summarizer for rewriting and tightening text. Limited $8.33/mo Web, Mac, Windows, iOS, Android AI paraphrasing in multiple modes; Summarizer May be used
SudowriteAI writing partner for fiction: brainstorm, draft, describe and get feedback on stories. No $10.00/mo Web Write, rewrite, describe and expand with story context; Muse, an in-house model for fiction Not used
RytrAI writing assistant for emails, posts and pages in your own voice, now with relationship follow-up tools. Limited $7.20/mo Web, iOS 40+ writing use cases in 38 languages; Rewrite, shorten, expand or continue text in your voice Unknown

*Lowest annual-equivalent price for the plan that includes the listed features (USD, as published by the vendor; "See notes" means no USD price was published, so check the app page). "ZDR providers" means the vendor says its AI providers are under zero-data-retention agreements. Check the app page for details and sources.

What to check before you pick

  • Check whether your text is used to train AI by default, and where the opt-out lives.
  • Pick by job: grammar and tone, paraphrasing, long-form editing or fiction drafting.
  • Paste less: avoid sending private journal entries or client details to any writing AI.
  • Compare yearly and monthly prices; several tools charge two to three times more month to month.

Comparisons and alternatives

Grammarly vs ProWritingAid

Side-by-side pricing, free plan, AI and privacy.

Grammarly vs QuillBot

Side-by-side pricing, free plan, AI and privacy.

Grammarly alternatives

Cheaper and more private AI writing tools.
An older man with a gray beard writes on sheets of paper at a dark wooden desk.
A young woman writes in a notepad while looking at a laptop outdoors.