SecondBrain

What SecondBrain is

SecondBrain is a note-taking app that turns spoken thoughts, typed notes, and content shared from other apps into organized notes, calendar events, and reminders. Its AI transcribes and titles captured material, then files it into a folder tree that builds around the notes. Mentioning a date can create a calendar event and reminder, and the app offers a daily morning briefing. Full-text search helps find notes, while an interactive 3D graph displays connections between them. AI summaries, note search, and audio transcription are supported. A shared-memory connector uses MCP to connect with assistants including Claude, ChatGPT, Gemini, Cursor, and Claude Code. The connector requires Pro; connecting ChatGPT also requires Developer mode, which the maker says is available on Plus or above. The maker says notes and calendar events are stored in an EU-hosted Supabase PostgreSQL database with per-account Row-Level Security. Voice and text go through Google Gemini’s paid API tier, which the maker says does not train on content. The maker also says it uses no analytics or ads, encrypts memory, and lets users delete their data. SecondBrain is available on web, iOS, Android, and macOS. The free plan has limited notes. Pro is $8.99 per month; Pro Yearly is $34.99 per year, with a second yearly App Store price of $44.99.

Who it suits

SecondBrain suits busy people, including founders and students, who want to capture thoughts by voice, typing, or sharing content and have AI sort them. It may also suit people who want notes connected to calendar reminders or accessible through an AI assistant connector on Pro.

Limits

The free plan has limited notes. Pro is $8.99 per month or $34.99 per year; the App Store also lists a second yearly price of $44.99. Pro enables unlimited notes, unlimited AI capture and answers, and the AI assistant connector.

Getting started

1. Visit https://secondbrainmemory.com/.
2. Choose the free plan or a Pro plan.
3. Use the app on web, iOS, Android, or macOS.
4. Capture a thought by speaking, typing, or sharing content from another app.
5. For shared AI memory, use the Pro connector; connecting ChatGPT also requires Developer mode.

Verdict

Choose SecondBrain if you want to capture ideas in several ways and have AI organize them alongside reminders and calendar events. Pro is the relevant plan for unlimited notes and the assistant connector; the free plan limits notes, and connecting ChatGPT has an additional Developer mode requirement.