Markdown reader · editor · notebook
More than Markdown.
One beautiful, powerful place to read, write, organize what you know, manage your time and think with an AI assistant — local-first, with every note a plain file on your device.
Windows · macOS · Linux · Android · Works offline, no account needed
Read
Read, beautifully.
- Book-quality typography for
.md,.mdxand.markdownfiles, in light or dark - Flowcharts, math, tables, code with syntax highlighting, and live interactive charts
- Book layout for long documents: read by pages, not one endless scroll
- Highlight as you read; bookmarks and an outline keep your place
Charts that run — inside the file.
This is a plain .md file. Rho MD turns its blocks into things you can drag.
Write
Write in place. Or in source.
- Click any paragraph and type: the document itself is the editor
- Formulas, footnotes and images stay intact while you edit
- Switch to the Markdown source at any time
- Free-form canvas boards for visual thinking, saved as plain Markdown
Organize your knowledge
Your knowledge, as a star map.
- Psi, the built-in library: every note in one place, grouped into constellations
- Psi Star Map: your notes as stars, your links as the lines between them
- Links between notes, tags, daily notes and full-text search
- A home page with today's note, your focus and your recent files
Manage your time
Time your work. See your focus.
- A Pomodoro timer and a stopwatch, with a button for each thing you work on
- A daily goal for each activity, and today's progress at a glance
- A statistics dashboard: focus by day, month and year, the notes you created and edited, your diary streak
- A calendar where every day shows its focus time, notes and diary
AI assistant
Ask Rho AI about your notes.
- Ask Rho AI about your own library; answers point back to your notes
- Research reports with numbered sources that have been checked
- Turn web pages, Word and PDF files into clean Markdown notes
- Before your first message, Rho AI shows what will leave your device
Local-first
Your notes stay yours.
Plain Markdown files
Your notes are plain Markdown files in folders you choose — nothing is locked in.
No account needed
Rho MD works fully without an account, and your library stays on your device.
An optional cloud
An optional rho.md account adds cloud backup and private sharing for free; a subscription adds sync for the folders you choose across your devices, publishing to Discover and Rho AI.
Free to use. Pay to create at scale.
Reading, writing, and sharing by link are free forever. You pay to keep every device in sync, to publish to the world, and to have Rho AI work for you — we run the model, so there is no API key to find.
- Read & write interactive
.md - Desktop and mobile reader, fully offline
- Share by private link with the readers you name
- 10 Rho AI requests, to see what it does
- The open
AINPformat, forever
- Your Psi library on every device you use
- Edited in two places? Nothing is lost — the older version waits in the recycle bin
- Publish to the public rho.md index — searchable, on your author page
- Organize works into collections
- Rho AI for everyday questions and tasks
- Everything in Pro
- A much larger Rho AI allowance, for heavy use
- More Rho web searches, with sources
- A daily ceiling, so one heavy day can’t drain the month
- Everything in Pro Plus
- The largest Rho AI allowance
- No daily ceiling, just the monthly one
- The most Rho web searches
Prices include tax — the number you see is the number you pay. A year costs ten months. Plans are bought and switched inside Rho MD, under Settings › Account.