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Quillstone

quillstone.io

Free plan macOSiOS
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Spec score 7.7 #21 of 27 in AI Book Writing Software

What it is

Quillstone combines research, drafting, fact-checking, audiobook creation, cover design, and publishing exports for journalists and nonfiction authors. It gathers PDFs, documents, notes, and offline references into an outlining workflow. Private AI tools can rewrite, expand, tighten, proofread, or continue prose using a sample of the writer’s work. Its fact checker adds inline citations, needs-citation markers, and a verification report. The app prepares EPUB, PDF, and M4B outputs, plus covers, metadata, and publishing checklists. Local chaptered audiobooks and layered cover designs are supported, with optional cloud narration and image generation. Quillstone Free costs nothing, billed forever; Pro costs $89, paid once as a one-time license. The Mac app is offline by default without analytics or telemetry, and project materials remain on the Mac. It requires an Apple Silicon Mac with M1 or later and macOS 15 or newer.

Spec sheet

Purpose
Quillstone combines research, drafting, fact-checking, audiobook creation, cover design, and book publishing exports for journalists and nonfiction authors.Read 8 Oct 2026 · quillstone.io
Intended users
Quillstone is designed for serious nonfiction such as reporting, biography, narrative history, manuals, textbooks, essays, and research-led books.Read 8 Oct 2026 · quillstone.io
Privacy
The Mac app is offline by default, has no analytics or telemetry, and sends selected text directly to a chosen cloud provider only when the user enables it.Read 8 Oct 2026 · quillstone.io
Support
Quillstone offers email support and says a real person usually responds within two business days.Read 8 Oct 2026 · quillstone.io
Audiobooks and covers
The app supports local chaptered audiobook creation and layered cover design, with optional cloud narration and image generation.Read 8 Oct 2026 · quillstone.io
Cloud providers
The privacy policy names OpenAI and Anthropic for cloud language models and ElevenLabs for optional narration.Read 8 Oct 2026 · quillstone.io
Fact checking
A built-in fact checker provides inline citations, needs-citation markers, and a verification report.Read 8 Oct 2026 · quillstone.io
Local data
The privacy policy says manuscripts, outlines, characters, covers, generated images, narration audio, and exports are stored on the Mac, and entered API keys are encrypted there.Read 8 Oct 2026 · quillstone.io
Other external services
The privacy policy identifies Brave for web search, OpenAI for online fact-checking, Hugging Face and CivitAI for model downloads, Sparkle for updates, and Lemon Squeezy for license validation.Read 8 Oct 2026 · quillstone.io
Publishing outputs
Quillstone can prepare EPUB, PDF, M4B, covers, metadata, and publishing checklists.Read 8 Oct 2026 · quillstone.io
Research workflow
The app can gather PDFs, documents, notes, and offline reference material and help shape them into an outline.Read 8 Oct 2026 · quillstone.io
System requirements
Quillstone requires an Apple Silicon Mac (M1 or later) running macOS 15 or newer.Read 8 Oct 2026 · quillstone.io
Writing tools
Its private AI writing tools can rewrite, expand, tighten, proofread, or continue prose anchored to a sample of the writer’s work.Read 8 Oct 2026 · quillstone.io

Plans and prices

Quillstone Free Free forever All nine writing and editing tools · private AI writing and editing · fact checker · research and offline retrieval · audiobook creation and voice cloning · cover design · EPUB/PDF export Read 8 Oct 2026 · quillstone.io
Quillstone Pro $89, paid once one-time license Everything in Free · bring-your-own-key cloud editing · cloud narration and image generation · publish-ready export bundle · no markup on provider costs Read 8 Oct 2026 · quillstone.io

Every Quillstone plan and price →

Strong points and limits

Strong points

  • Combines outlining, writing, fact-checking, and publishing
  • Creates EPUB, PDF, and M4B outputs
  • Supports local chaptered audiobook creation
  • Offline by default with no analytics or telemetry
  • Free plan includes nine writing and editing tools

Limits

  • Requires Apple Silicon Mac and macOS 15 or newer
  • Cloud narration and image generation require Pro
  • Selected text goes to providers only when enabled
  • No Android or Windows platform listed

Who it suits

It is designed for serious nonfiction work such as reporting, biography, narrative history, manuals, textbooks, essays, and research-led books. Writers wanting local-first research and publishing tools can use the Mac application.

Verdict

Quillstone brings research, manuscript editing, verification, audio, and book-production steps into one Mac-focused workspace. Its free tier is broad, while Pro adds cloud services and a publish-ready export bundle.

Where Specifiction places it

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