01Before the first line
Solid structure.Clear direction.
Volume outlines, chapter goals, and word targets. Sit down each day knowing where you are going.

The ferry arrived. The mist stayed.
Lin Wan had kept the letter for ten years.
The brass key was waiting for an unnamed door.
NOVELTHREAD / LONG-FORM FICTION STUDIO
Keep track of your cast and clues,
and finish the novel you set out to write.
HANDS-ON PREVIEW
INTERACTIVE DEMOOpen Mist-Town Letters. See how chapters, lore, and AI work together.
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Continue your story
A SYSTEM FOR NOVELISTS
01Before the first line
Volume outlines, chapter goals, and word targets. Sit down each day knowing where you are going.

02Author in command
AI offers alternative phrasing. Keep what works, discard what does not.

03Long-term continuity
Keep cast lore and planted clues connected across the whole book.

A quiet fullscreen view with local autosave. Just you and the words.
Select a sentence to polish or expand. Compare options, apply only what sounds right.
Flesh out scenes, refine outlines, and track threads. You approve every change, or set it to run on schedule.
Characters, locations, and lore all have their place. Check details without losing your flow.
See how characters, factions, and places connect. Untangle tangled storylines at a glance.
Know which seeds are planted, developing, or paid off. Never leave a promise behind.
Structure volumes, chapter goals, and word counts. Sit down each day knowing exactly what to write.
Run drafts chapter by chapter on your own machine, with clear summaries of what was written.
Spot timeline slips and forgotten threads after finishing a chapter. Helpful flags, never uninvited edits.
Catch cliches, repeated patterns, and sensitive terms locally before publishing.
Bring in existing manuscripts with auto-split chapters. Export clean text anytime with zero lock-in.
Local by default. Subscribers can turn on cloud backup to pick up seamlessly on another computer.
Your manuscripts stay on your drive and work completely offline. Network only needed for AI and sync.
macOS 12 Monterey+ (Apple Silicon only) and Windows 10+ (x64 only); mobile is Coming soon.
An active Plus subscription or higher lets you connect your own provider; requests go direct from your machine, billed on your side.
Approve each or allow automatic work. Local-first: stays on this computer. Cloud sync is off until you enable it. Consistency review (Beta): flags only. Term checks (Beta): run on this device.
The free tier includes local writing and exports, forever. Plus and higher subscriptions add support for your own API key, larger official AI quotas and cross-device sync. Using your own API key does not consume NovelThread credits, but your model provider bills you separately.
Cancel any time in Settings → Account; access continues to the end of the current billing period. Once charged, fees are not voluntarily refundable or prorated, except where required by law or for cases such as duplicate or unauthorised charges. See the Terms of Service.
Never. Your creative work is never used for AI training, and we never sell user data. The desktop app ships with zero advertising or behavioral analytics.
Your manuscript and privacy Your manuscript stays on your computer by default. AI never changes your text unprompted, and your words are never used for training.
Read the privacy policy