SecondBrain
SecondBrain is a note-taking app that turns spoken thoughts, typed notes, and content shared from other apps into organized notes, calendar events, and remin…
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 notes, then files them in a folder structure that develops as material is added. Mention a date to create a calendar event and reminder; the app also offers a morning briefing. Full-text search and an interactive 3D graph help users find notes and explore their connections. The MCP-based shared-memory connector works with Claude, ChatGPT, Gemini, Cursor, and Claude Code, but it is a Pro feature. Connecting ChatGPT also requires Developer mode, which the maker says is available on Plus or above. The free plan has limited notes. Pro costs $8.99 a month or $34.99 a year; the App Store also lists a yearly price of 44.99 USD. The app is available on web, iOS, Android, and macOS. The maker says notes and calendar events are stored in an EU-hosted database, and voice and text are processed by Google Gemini’s paid API tier, which it says does not train on content.
Good
- Capture by voice, typing, or sharing from other apps.
- Dates can create calendar events and reminders.
- Full-text note search and a 3D note graph.
- Free plan includes capture, organization, and recall.
- Available on web, iOS, Android, and macOS.
Watch out
- Free plan limits the number of notes.
- Shared AI memory connector requires Pro.
- ChatGPT connection requires Developer mode.
- Pro Yearly is listed at two prices: 34.99 USD and 44.99 USD.
Who it suits
SecondBrain suits busy people, including founders and students, who want to capture thoughts and have AI organize them. It may also suit users who want searchable notes, reminders, and calendar events in the same app.
Verdict
SecondBrain combines note capture, AI filing, search, reminders, and calendar events across several platforms. Check the note limit and connector requirements against your needs before choosing a plan.
Plans and prices
From SecondBrain's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | Limited notes; capture, organize and recall notes |
| Pro | $8.99 a month | Unlimited notes · unlimited AI capture and answers · AI assistant connector · Monthly; price listed as $8.99 in the US App Store |
| Pro Yearly | $34.99 a year | Unlimited notes · unlimited AI capture and answers · AI assistant connector · Yearly; App Store also lists a second yearly price of $44.99 |
The facts
Each one read from SecondBrain's own pages, with the date it was checked.
What it does
- AI integrations
- The shared memory connector uses MCP and supports assistants including Claude, ChatGPT, Gemini, Cursor and Claude Code.checked 9 Oct 2026
- AI organization
- Its AI transcribes, titles and files notes into a self-building folder tree.checked 9 Oct 2026
- Calendar and reminders
- Mentioning a date can create a calendar event and reminder, and the app provides a daily morning briefing.checked 9 Oct 2026
- Connector requirement
- Shared AI memory is a Pro feature, and connecting ChatGPT requires Developer mode, available on Plus or above according to the maker.checked 9 Oct 2026
- Data handling
- 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 are processed by Google Gemini's paid API tier, which it says does not train on content.checked 9 Oct 2026
- Export
- Pro on iPhone can export notes as Markdown files in a ZIP; the maker says this is a manual export rather than continuous sync.checked 9 Oct 2026
- Intended users
- The App Store describes it as a place for busy people, including founders and students, to capture thoughts and let AI organize them.checked 9 Oct 2026
- Privacy claims
- The maker says it uses no analytics or ads, does not train on user data, encrypts memory and lets users delete their data.checked 9 Oct 2026
- Search and graph
- The app offers full-text note search and an interactive 3D graph of connected notes.checked 9 Oct 2026
- Support
- The maker says users can request a full data export for other data or platforms by emailing its listed support address.checked 9 Oct 2026
- Voice capture
- The app can capture thoughts by speaking, typing or sharing content from other apps.checked 9 Oct 2026
- What it does
- SecondBrain turns voice input into organized notes, calendar events and reminders.checked 9 Oct 2026
The company
- Headquarters
- Sheridan, Wyoming, USAchecked 28 Sep 2026
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