Best Book Writing Apps in 2025

Do you have a story to tell? Unlike conventional word processors, Storyist helps you track your plot, characters, and settings, and keeps all of your writing organized and accessible—so you can focus on telling your story.

Platforms: Mac, iPhone, iPad

Best for: Outlining, Drafting, Book, and Story

Website: https://storyist.com/

Also rated 4.0 ★ on PC Magazine

The human brain is non-linear: we jump from idea to idea, all the time. Your second brain should work the same. In Obsidian, making and following connections is frictionless. Tend to your notes like a gardener; at the end of the day, sit back and marvel at your own knowledge graph.

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

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

Website: https://obsidian.md/

Also rated 4.5 ★ on TechRadar

Track your progress. Stay accountable. Finish your drafts.

Platforms: Online, Chrome

Best for: Drafting, Book, and Story

Website: https://www.writinganalytics.co/

Writemonkey is a Windows zenware writing application with an extremely stripped down user interface, leaving you alone with your thoughts and your words. It is light, fast and free.

Platforms: Windows, PC, Mac

Best for: Drafting, Book, Essay, Journal, Poetry, Story, Blog, and Free

Website: https://writemonkey.com/

Also rated 4.5 ★ on TechRadar

Zoho Writer is a fully-featured word processor on the cloud, designed for collaborative work that gives you everything you need to create powerful documents. With a clean UI, intuitive interface and document modes, it introduces you to a new way of writing.

Platforms: Android, Windows, PC, iPad, iPhone

Best for: Drafting, Book, Essay, Journal, Poetry, Story, Blog, and Free

Website: https://www.zoho.com/writer/

Also rated 3.4 ★ on Google Play

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/

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

Platforms: Mac, Windows, Online, PC

Best for: Outlining, Drafting, Book, and Story

Website: https://www.novel-software.com/

Notes are just the beginning. Create and annotate anything, from study guides to storyboards. We've got an intuitive, minimal interface for you to start in seconds.

Platforms: Mac, iPhone, iPad

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

Website: https://notability.com/

Also rated 4.7 ★ on the App Store

Whatever kind of writer you are, ProWritingAid will help you improve your writing and get your ideas across more clearly. Our grammar and style checker contains over 3,000 explanations and videos written by our experts, so you don't need to remember all those crazy rules.

Platforms: Mac, Windows, Online, PC, Chrome

Best for: Drafting, Editing, Proofreading, Book, Essay, Story, Blog, and Free

Website: https://prowritingaid.com/

Also rated 4.5 ★ on Reedsy

Write more than ever before! Your words have the power to defeat monsters! Discover over 500 unique monsters that will push your writing to the next level!

Platforms: Online

Best for: Drafting, Book, and Story

Website: https://4thewords.com/

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/

Join (probably?) the world's largest writing contest. Flex those creative muscles with weekly writing prompts.

Platforms: Online

Best for: Drafting, Book, Story, and Free

Website: https://blog.reedsy.com/creative-writing-prompts/