v2.7.5 · macOS · Windows
BrainOS holds your mind maps, notes, todos, habits, bookmarks and projects in one desktop app on your own machine — and gives Jarvis, its assistant, access to all of it. Nothing is uploaded anywhere.
One payment, every future update.
macOS 12+ (Apple Silicon or Intel) and Windows 10+. On Linux?
Runs on your machine Bring your own AI key Pay once, no subscription
assets/shots/
The actual problem
Your notes are in one app. Your tasks are in another. Your habits are in a third. And the AI you pay twenty dollars a month for has never seen any of them — so every conversation starts with you explaining your own life.
BrainOS puts all of it in one place, on your disk, and points the AI at it.
Powered by whichever AI you already use
Three of these are flat-rate plans you may already pay for. Sign in with ChatGPT, or paste a GLM or Qwen coding-plan key, and BrainOS runs on that instead of a metered API bill.
Why it’s different
A SQLite database and plain markdown files in a folder you pick. The server listens
on 127.0.0.1 and nowhere else. No
account on somebody’s cloud, no sync service, nothing to breach.
After each conversation Jarvis writes what it learned into a memory kept as markdown you can read and edit. Mention a decision in January and it still knows in June — without you pasting context back in.
One search reaches a node inside a mind map, a task on a project board, a bookmark’s AI summary and a line from a chat six weeks ago. Because it’s one app, not five with integrations.
New App Studio
“Build me a budget tracker.” “I want a reading log with star ratings.” BrainOS writes a real working app, runs it in a locked-down sandbox, and adds it to your sidebar next to the built-in ones.
assets/shots/jarvis.jpg.
Jarvis
Ask “what should I do today?” and it answers from your actual projects, overdue tasks, habit streaks and the notes you wrote last week — not from a blank slate.
Facts worth keeping get filed into markdown in your own folder, grouped by topic. Semantic search finds them later even when your words don’t match.
One request assembles what’s due, what’s slipping and what you said you’d do.
For decisions worth the tokens: three models answer, rank each other’s answers blind, and a chairman writes the synthesis.
The canvas
Double-click to make a node, drag to connect, and every node opens into a full markdown editor. Colour follows depth automatically, so the shape of your thinking is legible at a glance.
Already in Obsidian? Point BrainOS at your vault and it imports the notes, wires up the links, and makes the whole thing searchable by Jarvis.
Included
All sharing one database — which is why Jarvis can answer questions that cross them.
Daily habits and streaks, mirrored to a markdown file so your history is readable without the app.
Priorities and due dates. Jarvis can add, complete and reschedule them for you.
Save a link and it comes back with a summary, tags and quiz questions — so you actually retain what you saved.
Kanban boards with an activity feed, so you can see what moved and when.
Several subjects in parallel, with a daily plan that adapts as you finish items and logs the sessions.
And the seventh, eighth and ninth apps — the ones you describe and it builds.
For your AI agents
BrainOS speaks the same standard your agents already use to reach tools, so there’s no integration to wait for. Hand one a token and it can search your notes, read what it remembers about you, and tick off your tasks — all without your data leaving your machine.
$ claude mcp add brainos \
--transport http \
http://127.0.0.1:3210/mcp \
--header "Authorization: Bearer bos_…"
✓ connected · 26 tools, 2 resources
> what did I decide about pricing in June?
↳ recall_memory · search_brainosMind maps are read-only over MCP by design — editing one means recomputing canvas geometry, so the canvas stays the only writer.
Generate a token in Settings, paste it into your agent, done. Nothing to install and nothing to wait for us to build.
Plus Goose, Continue, LibreChat, the official Python and TypeScript SDKs — and any other MCP client, including ones that don’t exist yet.
The maths
Every year. Five logins. Five silos.
Then never again. Year two costs nothing.
List prices as published by each vendor at the time of writing, for a single user. BrainOS still needs an AI provider — the point is that it can be one you already pay for, or a free tier, and BrainOS never adds a margin on top.
No subscription
Every note app that charges monthly is holding something over you: stop paying and your thinking gets locked behind a paywall, exported to a zip file, or slowly degraded into a read-only museum of itself.
BrainOS can’t do that to you. It’s a desktop app with a database on your disk and no server to switch off. One payment, every future update, and if I disappear tomorrow the copy on your machine keeps working exactly as it does today.
That’s the whole reason the price is a number and not a rate.
Pricing
One payment for the app and every version after it. No subscription, no account, and nothing to renew.
one-time · every future update included
Paid by card or wallet through Polar, the merchant of record. Your order email links straight to the download and your receipt.
Your data stays a SQLite file and a folder of markdown on your own disk — exportable, and readable without BrainOS. The price buys the packaged, auto-updating app, and keeps it being built.
Questions
Copies installed before version 2.7.5 need one manual install to clear this. Open your purchase page from the Polar order email, download BrainOS again, and drag it into your Applications folder over the old copy.
macOS ties an installed app to the certificate that signed it, and only lets it update to a build carrying that same one. The earliest builds were signed with a development certificate or none at all, so the copy you are running refuses the properly signed releases that followed — correctly, and with an error about a code signature failing validation. No version can get past it, because the check runs inside the app you already have.
Nothing of yours is touched: your notes, maps, habits, chats and settings live in your Library folder, outside the application. Updates install themselves again from then on.
BrainOS ships today for macOS 12 and later — Apple Silicon and Intel — and for Windows 10 and later. Linux is the one platform still missing; leave your email and you'll get one message when it's ready, at the same founding price.