A local-first, powerful Markdown editor for the Mac, with a companion app for iPhone and iPad. AI works like an editor leaving notes on the page, not like a chatbot.

Why I started

I write a lot, and I was a heavy Notion user. The problem? My files were locked in its cloud. Want AI to proofread your notes? That takes a monthly subscription, for a feature that costs a few cents to run. So I moved to Obsidian. The files are local, so you can just point your AI at a folder. The new problem? Editing with AI still meant copying text into a chat window and pasting it back, and the plugins I tried all felt half-baked. I wanted one quiet page where the help comes to the text. So I built one.

What it does

Renders Markdown in place as you type: no split preview, with serif headings set like a manuscript.
Works on a vault of plain files, compatible with Obsidian, with [[wikilinks]], full-text search, backlinks and a history of every note.
Proofreads, rewrites or expands a selection. A full review session leaves anchored editor’s notes in the margin.
Shows every AI suggestion as a word-level diff, and you accept or reject each change on its own.
Answers questions from your own notes with citations you can check, and asks before any note is sent to a model.
Works with cloud models, your own command-line tools, Apple’s on-device model, or a model running on your own machine.

Approach

Built with Electron, React and CodeMirror 6 on the desktop, and a SwiftUI app on iPhone and iPad that hosts the same editor. Most of the work has gone into small things: getting the live preview right, typography, and making AI edits easy to review.

What I’ve learned so far

Designing a good interface for AI-assisted editing turned out to be much harder than I expected.