Your next AI conversation already knows you.

Mr. Mags catches what matters as you type and recalls it by meaning — so every new chat, on Claude, ChatGPT, Gemini, and ten more, picks up where the last one left off. Your memory is a folder on your own disk — no account, no cloud, not even ours.

Get Mr. Mags — free for 14 days How it works

Free for 14 days, no card. $100 once if you keep him — never a subscription. Teachers free, forever.

About

A memory that catches what matters, across every AI you use.

Mr. Mags is a persistent memory layer that sits next to whatever AI you're talking to. You type a fact in your chat — "my student Sam has a 504 accommodation," "I have a meeting Tuesday at 4pm," "the brief is X" — and the browser extension catches it before the AI sees it, so the fact gets saved no matter what the AI does. The next conversation, with that AI or a different one, starts where the last one left off. The memory lives with you, not with any vendor.

The Mac and Windows app holds your brain on disk and integrates with Claude Desktop as a first-class memory tool — Claude reaches for the save and recall tools directly, so you don't have to ask. The browser extension covers the rest: out of the box it covers 13 AI sites — claude.ai, ChatGPT, Gemini, Perplexity, Copilot, Grok, DeepSeek, Mistral, Meta AI, Google AI Studio, Poe, T3 Chat, and Qwen — and you can add your own AI server (Open WebUI, LibreChat, anything else) from the extension popup. One brain, many AIs, on your machine.

Your memory lives on your machine — no account, no cloud, not even your own rented cloud. It's a folder on your own disk: yours to back up, move, or delete. Your chats still go to Claude, ChatGPT, or Gemini exactly as they always have; Mr. Mags just keeps the memory — and the understanding it builds about you — with you instead of with a vendor. We can't lose it, sell it, or hold it hostage, because we never have it.

How it works

Two flows. Both run on your machine.

1. As you type, save-worthy facts get saved.

Type something like "my student Sam has a 504" or "I have a meeting Tuesday at 4pm" in your AI chat. The browser extension recognizes save-worthy patterns and writes them to your local Mr. Mags brain before you hit Enter — so the fact is stored even if the AI you're talking to refuses to remember it. You can toggle auto-capture off in the extension popup if you want manual control.

2. As you type, the right memories get pulled — by meaning. Auto-inject — on by default

The extension quietly searches your brain as you type — all on your machine, no API calls, embeddings run locally. The moment you hit Enter, the memories most relevant to your message get prepended before it leaves the page. And it matches by meaning, not keywords: ask "what music do I like?" and it surfaces the band you mentioned weeks ago — even though you never typed the word "music." On by default; flip it off right from the in-page pill if you want manual control.

It lives on your machine. It's yours.

Your brain is a local database in a folder you own — %APPDATA%\Mr. Mags\brain\ on Windows, ~/Library/Application Support/Mr. Mags/brain/ on Mac. No account, no cloud, not even a Mr. Mags server. Carry it between machines with one-click Export Ed / Import Ed — your whole memory travels as a single file. Walk away from Mr. Mags someday and your memory goes with you; there's no lock-in, because there's no vendor holding anything.

See everything it's learned — and curate it.

The Wall is your memory dashboard: every fact Mr. Mags has captured, when it learned it, and where it came from. Pin what matters, archive what doesn't, and delete anything for good. It's your memory — you stay in charge of what's in it.

Who it's for

Anyone tired of re-explaining themselves.

Lawyers walking AI through a case. Therapists onboarding a client. Founders catching new hires up. Writers building a world. Engineers carrying a codebase. Researchers tracking a thread. Teachers planning a year. Anyone who has opened a new chat and thought "ugh, here we go again."

Named for a school teacher whose students call him Mr. Mags. He was the first user — his lesson plans, rubrics, and parent emails kept evaporating into one-shot chats that forgot him the moment he opened a new conversation. Now they don’t. The shape worked for him; turns out it works for everyone whose work has context worth keeping.

Pricing

$100. Once. Yours forever.

Mr. Mags is $100 — pay once, own it forever. Every feature I ship, every update I push, every AI integration I add. No subscription. No upgrade tier you didn’t ask for. No surprise paywall in two years when I decide the free ride is over.

You get a 14-day free trial — no card, no sign-up, just download and use it. If it earns its keep, $100 unlocks it permanently. If it doesn’t, uninstall and walk away. Your memory file stays on your machine either way — it’s just a folder; it doesn’t disappear when your trial ends.

I’m a one-person shop. No VC, no sales team, no server costs to amortize because I’m not collecting your data — there’s no Mr. Mags server holding your memory to begin with. $100 is the number where the math works for me without doing any of those things.

Pay with PayPal — card or PayPal balance both work:

Secure payment via PayPal. Questions? [email protected]

Download

Mac. Windows. Browser anywhere.

Download for Windows →

Free 14-day trial · ~3-minute install · updates itself after that. install guide →

Mac, Intel, or the browser extension ↓

Browser extension

Carries your memory across 13 AI sites — Claude, ChatGPT, Gemini, Perplexity, Copilot and more. Auto-captures save-worthy facts and injects relevant ones on Enter.

Install the extension →

Works in Chrome, Edge, and Brave — about a 30-second load.

For Teachers

Teachers use it free, forever.

Mr. Mags was built for a teacher, so if you work in education it’s free for good — no trial, no catch. Email [email protected] from your school address and a license lands the same day.

From users

What people are saying.

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