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
Why ChapterFlow
Any AI can write a chapter. Holding forty of them together — the same room number, the same deadline counting down, the same fiancée and never a wife — is the hard part. Every chapter here is verified before you read it, and you see what was checked.
Each new chapter is read against every earlier chapter, the previous one in full, and your story bible — twice. Contradictions are corrected in place, one paragraph at a time, with everything else kept.
Dates, durations, who is where, who knows what. Statements inside a chapter that cannot both be true are caught before they become the next chapter’s premise.
When a chapter legitimately moves the story past a rule — a reveal, a discharge, a deadline compressed — ChapterFlow proposes the rewritten rule and you decide. Your bible never silently goes stale.
Every chapter ships with a report: what was checked, what was found, what was corrected, and what is flagged for you. Nothing passes silently.
Your manuscript is handled under an anonymous ID — your email is never attached to it when it is processed — used only to write and check your chapters, and erased 30 days after you close your account.
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. A chapter costs 3 credits; the smaller tools cost 1.
Free · 3 credits/mo
$9.99 · 10 credits
$18.99 · 20 credits
Save 5%
$29.99 · 35 credits
Save 14%
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 credits — a chapter costs 3 credits, and the smaller tools cost 1. After that you get 1 free chapter every month (your balance is topped back up to 3 credits once a month), and you can buy packs of 10, 20 or 35 credits (they never expire), and coupon discounts are available for students and authors. A desktop edition, sold as a one-time lifetime license, is coming soon.
Not yet — ChapterFlow Offline, a desktop app for macOS and Windows, is coming soon. It will be a one-time lifetime license running on a local AI model or your own API key, with all writing kept 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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