Core reads.
You write.
A macOS writing studio. It reads, critiques, and pushes back — never generates.
Your words stay yours.
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Core is a macOS app for long-form writing, featuring an AI editor that reads your entire project and an AI research tool that cites only verifiable sources — never fabrications. Built for novels, dissertations, and essays.
iOS app coming soonResearch it. Write it. Prove you wrote it. Publish it.
Research it.
Your Librarian
Search the world's libraries — the Library of Congress and the Internet Archive — without leaving the page.
Write it.
The Reader
An AI that reads your whole manuscript and pushes back — never generates.
Prove you wrote it.
Proof of Human Authorship
Export a signed certificate. The words are yours, and you can show it.
Publish it.
Output
For the web, a book, or a magazine. Export to PDF, DOCX, and EPUB.
AI that reads
everything you write.
AI built for writing. Just save your manuscripts and notes in Core.
The AI reads everything — and understands it.
Editor
Supports both vertical and horizontal writing. Typewriter mode included.
Ask anything.
It knows the answer.
Core doesn't just read the page in front of you. It analyzes every file in your project — themes, style, patterns you didn't notice yourself.
Think of it as an editor who never forgets a scene, a character, or a thread you planted three chapters ago.
The chapter leans heavily on visual description. In Staves I–II you used sound — creaking hinges, bell tolls, the chains Marley drags — to pace the scenes.
Your notes flag "uncanny soundscape" as a theme. Try threading more auditory detail back in.
Catalog of lamps, chandeliers & pipe connections for gas lights
LCA c. 1860 trade catalog with roughly 200 engraved plates of Victorian lighting fixtures.Plates are labeled with size and price in English currency; some show elaborate wrought-iron detail.
Real sources.
Zero fabrication.
Core never fabricates sources.
Ask a rough question and your Librarian will dig through context to surface verified materials — drawn from library collections and archives around the world. Digitized works are searched down to their full text, and you can browse their illustrations inline.
Powered by APIs at the Library of Congress
See what you wrote.
And what you didn’t.
Core asks you to mark nothing. While you write, it records what you typed, what you pasted, and what came from AI — so your own words stand out on the page.
When you need to show your work, export a writing certificate: the text, its provenance, and your typing rhythm, sealed with a signature anyone can verify.
How the writing certificate worksThe lamp in the window had been burning since dusk, and by now the oil smelled of smoke. Fixtures of the period were cast in iron and finished with a lacquer that darkened with age. She turned the wick down until the room went soft at the edges, and the shadows gathered like guests who had arrived too early. No — not guests, she thought. Something quieter than that.
Nothing was marked by hand. Core recorded it while you wrote.
Full screen. Pure writing.
One click hides everything but the editor.
Just you and the words.
Marley was dead, to begin with. There is no doubt whatever about that. The register of his burial was signed by the clergyman, the clerk, the undertaker, and the chief mourner.
Scrooge knew he was dead? Of course he did. How could it be otherwise? Scrooge and he were partners for I don’t know how many years. Scrooge was his sole executor, his sole administrator, his sole assign, his sole residuary legatee, his sole friend, and sole mourner.
Oh! But he was a tight-fisted hand at the grindstone, Scrooge! a squeezing, wrenching, grasping, scraping, clutching, covetous, old sinner!
Your story.
One glance.
Chapters, notes, references — a long manuscript has a lot of pieces. Core's file tree keeps everything where you can find it.
Reorder and restructure with drag and drop. Your mental outline, on screen.
Every word counts — even the ones you delete.
A day of cutting 5,000 words is still a day of progress.
Every struggle, every revision — Core tracks it all.
Writing Progress
Sun, Feb 1, 2026
Activity (past 6 months)
Weekly Trend
Your words stay yours.
Your manuscripts never leave your machine, and they're never used to train AI.
And when it matters, you can prove the words are your own.
Your manuscripts are
never used for training.
Your work belongs to you. Nothing you write is ever used to train AI.
Your data stays
on your machine.
Stored on your computer, not in the cloud. No risk of data leaks.
Proof of
Human Authorship.
Prove you wrote it. Core records what you type and paste, then exports a signed certificate — so you can show the words are yours by provenance, not guesswork.
Find the plan that fits your pace.
Every plan includes all features. Pick your AI usage level.
Change or cancel anytime.
Pro
ProFor writers who write every day.
- Sufficient AI usage for daily writing
- All writing features
- All AI features
- Import (Word, Scrivener) & Export (PDF, Word, EPUB)
No payment due today
Max
MaxWrite without limits, in total immersion.
- 5x the AI usage of Pro
- More advanced reasoning
- Deeper context understanding
- "Deep Think" mode for research
Q.Is there a free trial?
The Pro plan includes a 14-day free trial. You can try all features during the trial period.
Q.What's the difference between plans?
The Pro plan provides sufficient AI usage for daily writing. The Max plan offers 5x the AI usage plus deeper and broader reasoning across all AI features.