Second Brain: Notes&Knowledge

Second Brain is your offline-first personal knowledge management app. Capture every idea, note, and insight — and never lose a thought again.

No ads. No tracking. No account required. Your data stays on your device.

FEATURES:
• Rich Notes — Write with Markdown support, add images, link notes together
• Collections — Organize notes into collections with icons and colors
• Tags — Tag anything for instant filtering
• Daily Notes — One note per day, automatically created
• Goals — Track personal goals with milestones and progress
• Book Notes — Capture key takeaways from books you read
• Quotes — Save your favorite quotes
• Knowledge Graph — See how your ideas connect visually
• Bi-directional Links — Link notes and see backlinks automatically
• Full-Text Search — Find anything instantly
• Favorites & Archive — Star important notes, archive the rest
• Quick Capture — Capture thoughts from the home screen widget
• Face ID / Touch ID — Lock your app for privacy
• iCloud Backup — Optional, off by default
• Export — PDF, CSV, Markdown
• 15 Languages — English, Turkish, Spanish, German, French, Italian, Portuguese, Dutch, Polish, Arabic, Japanese, Korean, Chinese, Russian

PRIVACY FIRST:
Second Brain collects zero data. No analytics, no tracking SDKs, no servers. Everything lives on your device.

PREMIUM (one-time purchase):
Unlock unlimited notes, collections, Knowledge Graph, exports, Face ID, and home screen widgets with a single lifetime purchase.