BookCatalyst is professional writing software for authors who care about craft. Markdown editing, six readability formulas, style comparison against literary masters, and publishing-ready exports.
BookCatalyst gives you professional tools without the complexity. Every feature is designed to help you write better and publish faster.
A clean Markdown editor with customisable themes, focus mode, and powerful editing tools. Just you and your words.
Six industry-standard formulas — Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau, ARI, and Dale-Chall — all running in real time.
Compare your writing style against Hemingway, Orwell, Stephen King, and other literary masters. Understand what makes your voice unique.
Unlimited nested folders, chapters, and scenes. Organise complex manuscripts exactly how your mind works.
Every save creates a version automatically. Compare changes, restore previous work. 30-day retention so you never lose a word.
Dracula, Nord, Solarized, and more. Dark, light, and high-contrast options. Write in comfort, any time of day.
Export to PDF, EPUB, DOCX, and more with customisable styles and metadata. Go from draft to published without leaving the app.
Your work stays on your computer. No cloud dependency, no account required. Optional sync when you need it.
Built with WinUI 3 for a fast, responsive experience. Respects your system theme and feels right at home on Windows.
Whether you're writing your first novel or your twentieth technical manual, BookCatalyst gives you the tools to understand and improve your writing at a level no other app can match.
Novelists use it for long-form fiction. Screenwriters manage complex scripts. Technical writers create documentation. Former Mac users find it a worthy Ulysses alternative. Students sharpen their academic writing.
What they all have in common: they care about the quality of their prose, not just getting words on a page.
Get BookCatalyst →Download BookCatalyst and see if it's the right fit for your writing workflow. Every feature is unlocked during the trial.
Windows 10 & 11 · x64 & ARM64