Best Book Writing Apps in 2025

Stuck in front of a blank page? Need a boost of inspiration? Join us to overcome blocks and push your creativity to the max. With Writing Challenge, you will brainstorm new and fresh ideas and embrace freewriting in the funniest way ever.

Platforms: iPhone, iPad, Mac, Android

Best for: Brainstorming, Story, Book, and Poetry

Website: https://www.writingchallengeapp.com/

Also rated 4.4 ★ on the App Store

Compose bold, clear, mistake-free writing with Grammarly. Work with an AI writing partner that helps you find the words you need⁠—⁠to write that tricky email, to get your point across, to keep your work moving.

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

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

Website: https://www.grammarly.com/

Also rated 4.4 ★ on the App Store

Hemingway makes your writing bold and clear. It's like a spellchecker, but for style. It makes sure that your reader will focus on your message, not your prose.

Platforms: Windows, PC, Mac

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

Website: https://hemingwayapp.com/

Also rated 4.0 ★ on Reedsy

Most writers have at least one old notebook lying around somewhere, full of old story ideas, interesting characters, enchanting locations, or a myriad of other margin-scribbled thoughts. Notebook.ai is a worldbuilding tool that organizes, saves, and helps in fully fleshing out your fictional world, your way.

Platforms: Online, Chrome

Best for: Worldbuilding, Book, Story, and Free

Website: https://www.notebook.ai/

Are you using the right tool to get your novel written? If you want a finished manuscript, you need intuitive novel writing software that keeps you on track and helps you write more novels. Writing a novel is not easy, but it should be simple. Novelize has all the features you need while minimizing distractions. Just write!

Platforms: Online, Chrome

Best for: Outlining, Drafting, Book, and Story

Website: https://www.getnovelize.com/

Also rated 3.5 ★ on PC Magazine

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/

Ginger is more than a grammar checker, spell checker, and punctuation checker. Ginger is an all-in-one writing tool that includes Rephrase to empower you to write your best in ways that traditional online grammar checkers can’t.

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

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

Website: https://www.gingersoftware.com/

Also rated 4.6 ★ on the App Store

The Internet's best write-reward system! Write one hundred words, get an image of a kitten!

Platforms: Online

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

Website: https://writtenkitten.co/

Don't let your word processor drag your process down. Ironically enough, traditional word processors weren’t designed for writers. Dabble’s book-writing software was developed for writers, by a writer.

Platforms: Mac, Windows, Chrome, PC

Best for: Drafting, Book, and Story

Website: https://www.dabblewriter.com/

Made by writers, for writers, Novlr is the writing platform that will have you achieving your writing goals.

Platforms: Online

Best for: Drafting, Book, Story, and Free

Website: https://www.novlr.org/

Also rated 3.0 ★ on Reedsy

LibreOffice is a free and powerful office suite, and a successor to OpenOffice.org (commonly known as OpenOffice). Its clean interface and feature-rich tools help you unleash your creativity and enhance your productivity.

Platforms: Mac, Windows, PC

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

Website: https://www.libreoffice.org/

Also rated 4.0 ★ on TechRadar

Writer Assistant (Wassi) is an application created specifically for inventors! We all constantly invent new characters for our stories, be it a comic, a novel, a script, a play, or a game. And so that our characters are alive and riveted the attention, they need to be developed a lot! That is what the Writer Assistant was created for! Plus, with Wassi you can easily outline your stories on the go.

Platforms: Mac, iPhone, iPad

Best for: Outlining, Book, Story, and Free

Website: https://apps.apple.com/app/writer-assistant-wassi/id14686...

Also rated 3.9 ★ on the App Store