Second Brain vs Lucid

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.

Ever had a great idea, written it down, and never found it again? Notes apps just pile up. All-in-one tools get overwhelming. Lucid sits in between. ■ Catch the 3 seconds it lives Tap the home screen widget and start typing. Don't pick a type or a place — just get it down. ■ Organize in 5 minutes a day Swipe through your thoughts and answer one thing: "Where does this go?" No jargon — Projects, Areas, Resources, Archive. ■ Today, only what matters Open the app and today's tasks come first. Each one done is a small win. ■ Your second brain, in your hand No account, no login. Every thought stays safe on your iPhone. Stop losing your best ideas. Let Lucid remember them for you.