ChapterFlow is the writing studio for serious authors. Build a story bible, draft chapters with real continuity, audit your pacing, and ship a finished manuscript — covers and all.
No card required · Free credits to start
Story Bible
The Iron Compass
Chapter 3: The Signal at Dawn
Nadia pressed her palm against the cold relay tower and felt the pulse — three short, one long. Someone was still alive out there in the valley.
AI Assistant
Your complete AI writing studio
Turn a one-line premise into a complete, structured bible — characters, world, themes and a three-act arc that every chapter draws from.
Draft chapter by chapter with full plot continuity. A multi-stage pipeline plans, writes, audits pacing, then polishes the prose.
Every chapter is scored for tension and prose quality. Flagged chapters can be reconstructed in a single click.
A ruthless line-edit pass that varies cadence, breaks robotic patterns and strips the tells — until it reads like you wrote it.
Generate front matter, a copyright page and AI-designed front & back covers — then export the finished novel in one click.
Keep character sketches, settings, places and notes beside your draft — generated with AI and grounded in your story.
01
A sentence about your story is all it takes to spin up a full Story Bible.
02
Write one chapter at a time, each remembering everything that came before.
03
Score pacing, rewrite weak chapters, then humanize the prose.
04
Design covers, assemble front matter, and export the finished book.
Pricing
Credits never expire. One credit ≈ one generation.
Free · 3 credits/mo
$9.99 · 15 credits
$18.99 · 30 credits
Save 5%
$29.99 · 60 credits
Save 25%
Buy once, write offline forever. Unlimited local generations — no credits, ever.
$99.99
one-time · lifetime
Every chapter, character, and half-finished draft is yours alone — locked to your account, never shared, never used to train AI.
Download everything in one click, or erase every trace. Your story leaves when you do.
Read our privacy policyChapterFlow is an AI novel-writing studio. You describe your story, it builds an editable Story Bible, then drafts your book chapter by chapter through a multi-stage pipeline — plan, write, audit pacing, and humanize the prose. It also writes articles, short stories, research profiles, and full manuscript front matter.
Every chapter is generated from your Story Bible plus an automatic recap of earlier chapters, so plot threads and character voices carry forward. A built-in audit scores each chapter’s pacing, and weak chapters can be rewritten in one click.
You do. Manuscripts, prompts, and AI-assisted output belong to the author. Your writing is locked to your account, never shared with other users, and never used to train AI models.
Signing up is free and includes 10 starter credits — one credit generates one full chapter. After that you buy credit packs (they never expire), and coupon discounts are available for students and authors. A separate desktop edition is sold as a one-time lifetime license.
Yes. ChapterFlow Offline is a desktop app for macOS and Windows with a one-time lifetime license. It runs on a local AI model (fully offline, unlimited generations) or your own API key, and all writing stays on your computer.
Yes. Every book, chapter, and note is protected by database-level row security so only your account can read it. There are no tracking or analytics cookies, payments are handled by Razorpay so card details never touch our servers, and you can export or permanently delete all your data anytime.
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