The writing app that made focused, plain-text Markdown a genre — a fixed mono typeface, a tuned measure, and nothing else to fiddle with.

iA Writer is a Markdown editor with a strong point of view: one carefully drawn typeface, one ideal line length, and a canvas with nothing on it but your words. It syncs plain-text files, previews them as clean typography, and gets out of the way so the writing is the only thing left to work on.
iA Writer has been quoted in The New Yorker and copied by nearly every writing app since. The restraint is the feature — no fonts to pick, no themes to tweak — and the details that remain are excellent: Focus Mode dims everything but the current sentence, and Syntax Highlight greys out adjectives and filler so weak prose stands out.
Focus Mode — keep only the current sentence or paragraph lit
Syntax Highlight for spotting adjectives, conjunctions, and filler
Content blocks — embed tables, images, and other documents by reference
Plain-text files with folder-based library and any sync service
Style checks and readable, print-ready export to PDF, DOCX, and HTML
Wiki-style links for connecting notes
A one-time $49.99 purchase for the Mac app, with free updates.
Featured in:


Writing & Documents · $19.99 · one-time (Paid for major upgrades (for example 1.x -> 2.x))
Native macOS notes that slide out from your screen edge, so you can capture tasks, links, and snippets without leaving your work.


Writing & Documents · $12.99 · one-time (One license, up to 3 Macs)
Turn your handwriting into a real font. Write one page, snap a photo, and type with it anywhere on your Mac. Nothing leaves your Mac.


Writing & Documents · Free & open source
A free, open-source second brain — notes live as local Markdown files with native Git history and built-in AI agents, no proprietary database.