Free to write. Core to publish.
The free version never caps your writing. InkSpine Core is a one-time purchase, not a subscription, and adds the publishable files, unlimited worldbuilding and the revision tools.
Free
Write the whole book: unlimited writing, the corkboard and plot overview, search, import, and Markdown and HTML export.
InkSpine Core
…
One-time payment
Publish it: EPUB, DOCX and PDF, unlimited books, entries and arcs, every version of every chapter, book-wide rename and the revision tools.
Pay once, no subscription. Every version released in your first 12 months is yours to keep. How licensing works
Buy InkSpine Core| What you get | Free | Core |
|---|---|---|
| Writing and planning | ||
| Writing | Unlimited: no word or chapter limits | Unlimited |
| Corkboard, Plot Overview, search, import and Flow mode | Included | Included |
| Books per project | 1 | Unlimited |
| People, places and ideas | 10 entries per project, shared across the four kinds | Unlimited |
| Arcs | 3 per project | Unlimited |
| Publishing | ||
| Markdown and HTML export | Included | Included |
| Formatted on-screen preview (Reader) | Included | Included |
| EPUB, DOCX and PDF files | Not included | Included |
| Revising | ||
| Chapter history list | Included | Included |
| Open and compare earlier versions | 3 most recent per chapter | Every version |
| Book-wide rename | Not included | Included |
| Repeated-word check on the open chapter | Included | Included |
| Book-wide repeated-word scan | Not included | Included |
| Ownership | ||
| Your files stay on your computer; works offline | Included | Included |
Yours to keep
Core is yours to keep: you pay once, it is never a subscription, and the version you buy has no expiry date and works on up to three of your devices. It includes 12 months of feature updates. After the first year, more updates cost half the Core price at the time, and you keep everything either way.
Never capped
Your prose is never capped. Anything over a free limit stays visible and readable; nothing is hidden or removed.
Refunds
14-day money-back guarantee, once per person — see the refund policy.
Actively developed
New versions arrive regularly, and every one released during your updates period is yours to keep.
Shaped by writers
Send feedback from inside the app; we read it and it shapes what we build next.
System requirements
macOS
macOS 11 Big Sur or later (Apple Silicon and Intel)
Signed and notarized by Apple.
Windows
Windows 10 or Windows 11, 64-bit
The first launch may show a SmartScreen notice. Why it appears
Linux
Linux, 64-bit (x86_64), with glibc 2.35 or newer and WebKitGTK 4.1, such as Ubuntu 22.04, Debian 12 or Fedora 37 (.deb and .rpm packages)
About paying
All pricing questions →Is it a subscription?
No. InkSpine Core is a one-time purchase that works on up to three of your devices, with no recurring fee. It includes 12 months of feature updates, and every version released in that time is yours to keep.
What happens when the trial ends?
InkSpine becomes the free version. Nothing is deleted: everything you wrote stays in your files, and anything over a free limit stays readable.
Can I use Core on more than one computer?
Yes, on up to three of your devices.