SecondBrain
Build your second brain on your phone, just by talking
2 followers
Build your second brain on your phone, just by talking
2 followers
Tap and talk. SecondBrain writes a clean note in your words, files it in the right folder, and turns dates into calendar events and reminders. It never guesses a time, it asks. Later, ask anything and it answers from your notes. Pro adds a shared memory for Claude, ChatGPT, Gemini and Cursor over MCP, so every AI you use knows your context. iPhone, Android and web, in 5 languages. Free plan: 10 notes and 3 AI requests a day. Your notes are not used to train AI models.
Hi Product Hunt, I'm Federico. I built SecondBrain because of my ADHD. If I don't write something down in the next thirty seconds, it's gone: ideas, appointments, the thing I promised someone I'd remember.
So I made something I can just talk to. I tap, I talk, and SecondBrain writes a clean note in my words, files it in the right folder, and puts the appointment on my calendar with a reminder. If I give it a day but no time, it asks "At what time?" instead of guessing. Later I just ask "What did I promise my sister?" and it answers from my notes.
The part I use most now is the shared memory. With Pro, Claude, ChatGPT, Gemini and Cursor can read and write the same notes over MCP. Setup takes about two minutes and needs no API keys, so I stop re-explaining my life to every new chat.
In Claude Code it installs as a plugin: claude plugin marketplace add fed3c3sa/secondbrain-shared-memory, then npx secondbrain-connect. The setup for Claude, ChatGPT, Codex, Gemini and Cursor is here: https://github.com/fed3c3sa/secondbrain-shared-memory
The video above is me walking through it. We also made two short films:
The spot (51 seconds): https://youtu.be/3Ga1u9QzOaw
"We are not meant to remember everything" (21 seconds, from my own drawings): https://youtu.be/lNJhyQKaDZU
It runs on iPhone, Android and the web, in 5 languages. The free plan gives you 10 notes and 3 AI requests a day.
One question I'd love your answer to: what is the one thing you'd want your AI to always remember about you? And if anything felt clumsy, tell me here or at info@secondbrainmemory.com. That is worth more to me than anything else.