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AI-Native Book Writing Environment

Your words.
Your device.

Everything stays on your device. AI always at hand. No distractions, no subscriptions.

Download for Windows Download for Linux

v0.1.10 beta · Free

What is Mergen Ink?

Mergen Ink is an AI-native, privacy-first book writing application built for serious writers.

Read more about Mergen Ink

Simple and easy UI

Designed to get out of your way and let you focus entirely on your writing.

Mergen Ink Editor Screenshot 1 Mergen Ink Editor Screenshot 2 Mergen Ink Editor Screenshot 3

Why Mergen Ink?

Local-First

All data on your device. Works offline. Our servers never see your writing.

Three Writing Modes

Writing: full focus. Assist: AI helps. Challenge: AI attacks your arguments to make them stronger.

Secure AI

API keys encrypted on device. Choose Claude, Gemini, or GPT-4. No proxy, no middleman.

Book Structure

Part, Chapter, Section hierarchy. Drag-and-drop reordering. Per-section AI context.

Multi-Format Export

Markdown, HTML built-in. DOCX, PDF, EPUB via Pandoc. Auto-backup every 10 saves.

Free

Core features completely free. No hidden fees.

Real privacy

Most writing tools send your data to their servers. Mergen Ink works differently.

✓ All your writing is stored locally in SQLite on your Mac, Windows, or Android device
✓ When you use AI, text goes directly from your device to your chosen provider — not through us
✓ API keys are stored encrypted on your device and never reach us

Start writing

v0.1.10 beta · Free for macOS, Windows and Android

Windows · x64 Download for Windows .exe · ~4.3 MB Linux · amd64 Download for Linux .AppImage · ~4.3 MB

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Get in Touch

Have a question?
We listen.

Bug report, feature request, or just saying hello — your message goes straight to us.

↳ We usually reply within 24–48 hours
↳ Your data is only used to reply to your message
↳ We accept messages in multiple languages
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