From Plan
to Publication

Grasmere is a Mac app for long writing projects in Markdown. Research your subject and import your sources, draft your manuscript, review it with peers then publish it with all the right formatting & citations, to Word, PDF or the Web.

Download for macOS 1.6 · macOS 15+

Try it free for 14 days. Then $14.99 forever.

There’s no subscription, no account and no proprietary formats. Just plain Markdown files on your Mac.

01

Research

Make a plan for your project. Collect your research from websites, books and papers so you can cite it later. Bring together all your tasks in one list.

Web Clipping Highlights & Annotations PDF Papers PDF Highlights BibTeX Import Zotero Reader Import Brainstorm Index Cards
The Research stage: a question box, the project's sources as cards, highlights, tasks and loose ends
A saved web article in the reading pane beside the sources, its highlighted passages numbered, with Highlight and Annotate over the selected words
A source on the page with its PDF beside it, words selected in the PDF and Highlight over them
02

Draft

A pure Markdown writing experience, free from distraction. Find interesting links between your documents and brainstorm ideas with the on-device model.

Writing Links Tasks Journal Citations Mermaid Neat Tables Focus Mode Writing Goals Writing Replay
03

Review

Your reviewer uses Word. You stay in Markdown.

Review Word Round Trip The Margin Running Order
A comment being added beside a sentence in the Review stage
Step 1

Send.

Export a Word file from the Review screen. Your open comments go with it.

Step 2

They review.

In Word, Pages or Google Docs, with comments and tracked changes as usual. They don’t need Grasmere.

Step 3

Import.

Drop the file back in. Every comment and change appears beside your text, ready to accept, reject or reply to. Changes you made in the meantime are kept.

04

Publish

Publish your manuscript in PDF or Word Doc, complete with citations and formatting. Publish your project as a website with one click.

Manuscript PDF Word Website
The Publish stage: four chapters in hand, laid out as the pages of a book, with the title, author, style and citation options beside them
A page with a table, a diagram and a list, formatted for the book
A chapter's page with a footnote at its foot and the page number below
Privacy & AI

Your Writing Belongs To You

01

Nothing leaves your Mac unless you send it.

No account, no analytics, no tracking. Grasmere has no server. Your documents are Markdown files in folders you choose.

02

AI that runs on your Mac.

Ask and Brainstorm use Apple’s on‑device model by default. They work offline and send nothing anywhere.

03

AI that leaves the writing to you.

Brainstorm an essay, research or runbook. Grasmere asks you questions and you get the ball rolling.

Start writing today.

Download for macOS Free for 14 days, then $14.99 forever · 1.6 · macOS 15+