AI Book Writer - Chapterhouse

About this app

Chapterhouse is an AI book writer and novel writing studio for book-length work. Write a book with AI that holds one voice from the first chapter to the last: outline it, build the story bible, draft chapters with the AI story generator, run continuity and critique, paint a cover, and export to EPUB, PDF and print. Not a chat window and not a blank document — a manuscript: structure, cast, continuity, and a voice that has to hold for 80,000 words. NOTHING IT WRITES IS YOURS YET Generated prose is never merged silently into your book. It arrives as a provisional layer in an editor's non-photo blue, with the sentence it would replace still visible and struck through. You read it in place, against your own words. It becomes part of the manuscript when you accept it, and not one moment earlier. SET THE VOICE ONCE, HOLD IT FOR 80,000 WORDS Style DNA fixes point of view, tense, register, prose density, pacing, and the things you never want it to do. It lives on the book and goes out with every request, so chapter nineteen sounds like chapter one. TWELVE FORMS, TWELVE SETS OF CRAFT RULES Novel, thriller, romance, fantasy or sci-fi, non-fiction, memoir, business, self-help, course or guide, cookbook, children's book, poetry or essays. A cookbook gets headnotes and recipes; a children's book gets spreads and read-aloud rhythm; non-fiction gets asked for evidence and flags its own unverified claims. PLAN BEFORE YOU DRAFT • Outline chapters with word targets, beats, and status • A story bible of characters, places, and rules — extracted from the prose you have already written • The signature stack: your book drawn as gatherings sewn to a spine, so you can see where the long chapters are, which are empty, and where drafting stalled THEN WORK LIKE AN EDITOR • Draft, continue, rewrite, tighten, expand, or change the register of any passage • Continuity check reads a chapter against your bible and the chapters before it • Critique names the actual problem instead of complimenting you • Version history for every chapter, restorable • Focus mode: the page, the word count, nothing else COVERS, DRAWN NOT UPLOADED Every cover is painted from a handful of settings, so it is always available, always sharp, and restyles instantly. No image search, no uploads, no licensing questions. YOUR WORDS LEAVE THE APP Export to EPUB, PDF, and print layout, plus Markdown, plain text, HTML, and a full project file. Plain-text and Markdown export are free forever. A manuscript you cannot get out of an app is being held hostage, and no paywall belongs between a writer and their own words. BUILT FOR THE WRITING, NOT THE DEMO Autosave with atomic writes, so a crash mid-save leaves your last draft intact. Dark chrome with a paper-white manuscript surface that stays light inside a dark app if that is what you want. Adjustable measure and type size. Four typefaces bundled, none fetched at runtime. Works on iPhone, iPad, and Mac. FREE • 6,000 AI words a month • 2 books, 5 chapters each • Full outlining, story bible authoring, covers, editor, focus mode • Markdown, plain text, HTML, and project-file export Free is generous on structure and tight on generation on purpose: you can plan an entire book before you are asked for anything. Chapterhouse PRO • Unlimited AI words • Unlimited books and chapters • Continuity check, critique, and automatic bible extraction • EPUB, PDF, and print export • 50 versions per chapter Pro is available as a monthly or annual subscription, or a one-time lifetime purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours of the end of the current period. Manage or cancel in your App Store account settings. Terms : https://cdn.socialgrowthbiz.com/inkwell/eula

Bug Fixes

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

1. First observed Sep 8, 2026 · 1:07 AM Free