For Novelists · Worldbuilders · Game Designers
Your World.
Your Voice.
Enhanced.
Mythos is the living archive for storytellers — a writing studio that holds the weight of your world so you can focus on the soul of your story. It does not write for you. It remembers with you.
macOS · Windows · Linux — iPad companion coming soon. Or $5/month if you prefer.
A Different Covenant With AI
It will not write your book.
The world does not need another machine that generates prose. It needs a tool that carries a decade of worldbuilding in perfect memory — and hands it back at the exact moment you reach for it.
Mythos gives you three companions — a research assistant, a developmental editor, and a continuity guardian. They have read every word you've written. None of them will write the next one.
Mythos will never
Mythos will
Your Creative Companions
Three minds at your desk
The Muse
Your world-building partner
A conversational gateway to your own imagination. It has read every chapter and every note — so it answers questions no other AI can.
"Find me a thread I left dangling in the third act."
The Coach
The architect of plot
Beat sheets, outlines, and structure. It stages every change as a plan you approve — and never touches your prose.
"Move the locket discovery to Chapter 5. Update every reference."
The Editor
The guardian of consistency
Continuity, voice drift, and dangling promises — surfaced as findings with both conflicting passages shown side by side.
"Her eyes were grey in Chapter 2. They are green now."
The Codex — Dossier
ELARA VANCE
Alchemist of the Shattered Isles · Protagonist
Relationships
The Codex
A world-bible that writes itself into your prose
Characters, locations, factions, and lore live as rich dossiers — with relationship maps, stat bars, and portrait galleries. Type [@ in the editor and your entire world is one keystroke away.
And when your prose canonizes a new detail, the Editor notices — and proposes the Codex update for you. Your world-bible stays current without bookkeeping.
Explore the Codex →Explorations
What if the mentor betrays the hero?
Branch your entire manuscript in one click. Rewrite chapters, kill characters, break the magic system — your Main draft remains pristine. If the experiment works, compare side-by-side and merge back only the passages that earned it.
Version control, rebuilt for people who think in drafts — not diffs.
See how merging works →Selective merge: cherry-pick paragraphs, not whole files.
The Full Study
Everything a world demands
The Atlas
Illustrated world maps with pins and AI route-plotting linked to your Codex.
The Chronicle
A horizontal, multi-thread timeline of your world's history against your manuscript's beats.
The Game Table
A character forge, a dice engine, and an AI Game Master — playtest your world live.
Lumina
The focus mode: chrome dissolves into a glassmorphic writing cabin. Just you and the page.
Professional Export
One-click PDF, EPUB, DOCX, and Markdown — act title pages, scene separators, page numbers.
Private by Design
Native app, local knowledge base, your own AI keys — Anthropic, OpenAI, Gemini, or fully offline via Ollama.
Themes
Eleven faces for one desk
The signature Aurum look — charcoal and gold, a grimoire by lamplight — ships beside four crafted skins with their own typefaces, and a Daylight set of six light themes for writing at noon.
Themes restyle the entire editor live, and revert with a keystroke. Install new ones as single-file bundles.
Try the themes →An Honest Ledger
Why not the others?
Scrivener is a fine drafting tool; Notion a fine database. Neither has read your book.
The Terms
Own it. Or rent it. Or try it free.
The trial is the full application, free for 14 days. No account required. Your projects stay on your machine either way.
