Best Book Writing Apps in 2025

If you write thrillers, romance, mysteries, fantasy, sci-fi, young adult, horror or one of a thousand other subgenres, we’d like you to meet our fiction-loving A.I., Marlowe. She can read and critique your work with a comprehensive 36-page report in a matter of minutes and deliver fascinating, actionable insights.

Platforms: Online

Best for: Book, Editing, and Story

Website: https://authors.ai/marlowe/

Open to write and follow the prompt suggestions, it's that easy. Good for poetry writing, journal writing, storytelling, narration, cinema, and more. All using a patented artificial intelligence technology.

Platforms: iPhone, iPad

Best for: Brainstorming, Story, Book, and Poetry

Website: https://apps.apple.com/us/app/creative-writing-prompts/id...

Also rated 4.6 ★ on the App Store

Publisher Rocket will help you get your book in front of more Amazon shoppers so you can spend less time marketing and more time writing.

Platforms: Online

Best for: Publishing, Book, and Story

Website: https://publisherrocket.com/

The only writing platform with unlimited potential through project management, collaboration, and publishing.

Platforms: Online, Chrome

Best for: Outlining, Drafting, Book, and Story

Website: https://www.squibler.io/

Notes is the best place to jot down quick thoughts or to save longer notes filled with checklists, images, web links, scanned documents, handwritten notes, or sketches. And with iCloud, it's easy to keep all your devices in sync, so you’ll always have your notes with you.

Platforms: Mac, iPhone, iPad

Best for: Note-taking, Journal, Book, Story, Essay, Poetry, Blog, and Free

Website: https://apps.apple.com/us/app/notes/id1110145109

Also rated 3.3 ★ on the App Store

The only online writing and editing platform that guides your hand based on data from real, bestselling books, AutoCrit is built to match the genuine demands of publishing professionals and discerning readers.

Platforms: Online

Best for: Outlining, Drafting, Proofreading, Book, Story, and Free

Website: https://www.autocrit.com/

Also rated 4.0 ★ on TechRadar

Werdsmith turns your iPhone, iPad, Mac and Apple Watch into a powerful writing studio that inspires you to write. With features to motivate you and help you break through writer‘s block, you‘ll find yourself writing more than ever.

Platforms: iPad, Mac, iPhone

Best for: Drafting, Book, Story, Poetry, and Free

Website: https://werdsmith.com/

Also rated 4.7 ★ on the App Store

Manuskript is a perfect tool for those writer who like to organize and plan everything before writing. The snowflake method can help you grow your idea into a book, by leading you step by step and asking you questions to go deeper.

Platforms: Mac, Windows, PC

Best for: Outlining, Story, Book, and Free

Website: https://www.theologeek.ch/manuskript/

Plot your next masterpiece with Pluot, the writing planner packed with features and there for you whenever inspiration strikes.

Platforms: Android

Best for: Outlining, Worldbuilding, Book, Story, and Free

Website: https://pluotstudios.com/

Also rated 4.3 ★ on Google Play

Outline faster, organize smarter, and turbocharge your productivity today with the #1 visual book planning software for writers.

Platforms: Mac, iPhone, iPad, Android, Windows, PC

Best for: Outlining, Book, and Story

Website: https://plottr.com/

Also rated 3.0 ★ on Reedsy

The Novel Factory helps guide new writers through the novel writing process - while completing your first manuscript.

Platforms: Mac, Windows, Online, PC

Best for: Book, Drafting, Outlining, and Story

The #1 text to speech solution for personal, commercial, and educational use.

Platforms: Online, iPhone, iPad, Android

Best for: Editing, Story, Book, Blog, Journal, and Free

Website: https://www.naturalreaders.com/

Also rated 4.0 ★ on TechRadar