SecondBrain: AI Notes & Voice

Capture anything in seconds. Find it forever — just by asking.

Second Brain is the note-taking app that does the organizing for you. Write a note, build a list, or simply say what's on your mind — by text or voice. No folders. No tags. No filing. Later, ask in plain words and your second brain remembers.

Tell it "Jane's favorite food is lasagna." Weeks later, ask "what's Jane's favorite food?" — and it answers "lasagna." Say "dentist tomorrow at 2" and it reminds you and puts it on your agenda. That's the whole idea: capture by meaning, find by meaning.

CAPTURE ANY WAY YOU THINK
• Classic notes & checklists for ideas, groceries, trips, and projects
• Text or voice messages — dump a thought in seconds; voice notes transcribe themselves
• Photos, links, places & people — saved with a tap
Messy is fine. You never have to organize a thing.

JUST ASK — IN PLAIN LANGUAGE
"When's my dentist appointment?" "Where was that restaurant?" "What did I decide about the project?" Ask anything and get a clear answer pulled from everything you've saved. It's search that finally understands you.

REMINDERS & A CALM AGENDA
Say "remind me to call Mom on Friday" or "dentist tomorrow at 2," and it lands on your agenda. See everything coming up in one clean, scheduled view.

PEOPLE & TOPICS, ORGANIZED FOR YOU
Second Brain quietly recognizes the people and topics you mention — like Jane, or your dentist — and gathers everything about each one in a single place. Tap a name to see every note, message, and memory connected to it. Your own knowledge graph, built automatically.

ONE CHAT, ALL YOUR KNOWLEDGE
Ask in chat and it draws not only on your past conversations but on your notes and lists too — so every answer uses everything you know.

YOUR DAY & WEEK, SUMMED UP
Get an AI daily or weekly recap of what you captured and did — your own intelligent journal, written for you.

ONE SEARCH FOR EVERYTHING
Search across every message, note, and list from a single screen. If you saved it, you'll find it in seconds.

FREE TO START — PREMIUM TO GO FURTHER
Second Brain is free to use: capture text notes, save links, and ask up to 5 questions a day (up to 500 characters each).

Second Brain Premium unlocks the full experience:
• Unlimited daily capture and questions, with no length limit
• Voice notes with automatic transcription
• Photo attachments with auto-captions
• AI answers that draw on all your notes and lists at once
• Automatic people & topics organization — your own knowledge graph
• Daily & weekly AI recaps of what you captured

Premium is an auto-renewing subscription, offered monthly or yearly; the price is shown in the app before you confirm. Payment is charged to your Apple ID at purchase, and it renews automatically unless turned off at least 24 hours before the period ends. Manage or cancel anytime in your App Store account settings.

PRIVATE BY DESIGN
Your memories are yours. To understand them and answer your questions, what you capture (text, voice, photos) is sent securely to our AI providers — Anthropic (Claude) and OpenAI — who process it solely to run the app. Your data is never sold and never used to train AI models. Delete anything, anytime, and it's gone for good.

Perfect for note-taking, voice notes, journaling, to-do lists, reminders, meeting notes, ideas, and building a personal knowledge base — all in one app.

Capture your life. Ask it anything. Never forget again.

Terms of Use: https://www.secondbrainnotes.app/terms.html
Privacy Policy: https://www.secondbrainnotes.app/privacy.html