Features
Everything around the writing — and never the writing itself
Calliope stands on two legs: a free writing studio built for the whole manuscript, and a metered AI layer around it. One hard line runs through both — it never writes your prose.
The writing studio · free & unlimited
A real studio for the manuscript
Everything you need to write a long book — the page, the craft, the memory, the reflection. All of it free, no account required, no feature behind a paywall.
Write
Distraction-free editing
Real book typography, warm paper themes, dark mode, focus mode, and typewriter scroll — a surface built to disappear so the page is the only thing you see.
Explore →Revise
Craft lenses
Ten colour washes that reveal your own habits on the page — adverbs, filter words, sentence rhythm, sensory balance, echoes and more — each teaching from both sides so you decide. It recolours your prose; it never rewrites it.
Explore →Feel
Ambience
An opt-in, reactive backdrop for the page — a constellation that grows as you finish sentences, an aurora that deepens as you write. Subtle, peripheral, and off unless you want it.
Explore →Reflect
Writing stats
Your habit and your book, given back as a calm stats page — a year heatmap, a forgiving streak, your writing persona, the cast of your story, and a shareable Writing Wrapped. It never shames a slow week.
Explore →Remember
The Map & structure
The canon of your world — characters, places, facts, every mention — and the outline of your manuscript: parts, chapters, synopses, statuses, reordering.
Explore →The AI · the only part you pay for
An AI that has read your book
Grounded in your real manuscript and open to the tools you already use. It researches, remembers, and checks — and one hard line runs through all of it: it never writes your prose.
Think
Marginalia & the AI companion
Notes, to-dos, and chat pinned to the paragraph they're about — beside an AI that reads your whole book, checks it against your canon, and never writes a line of it.
Explore →Research
Research beside the page
Ask a question mid-sentence and the companion searches the web, reads the sources, and answers with citations — right in the margin, without pulling you out of the draft. It hands you facts, never prose.
Explore →Connect
The MCP connector
Point Claude, ChatGPT, or Cursor at your real book — with a public catalog of editor, critique, character, and craft-drill skills. It reads everything; it never writes your prose.
Explore →Automate
The Writer API
Your book as data you can script against — import a legacy manuscript, run a transform, wire a publish pipeline. The one surface where your own prose can flow in and out.
Explore →The cursor is already blinking
No account, no setup, nothing to pay. Open the studio and write — the AI is there when you want it.
Start writing — free