Second Brain
Your universal capture tool and personal knowledge archive.
A minimalist, offline-first Android app designed to seamlessly save links, ideas, images, voice memos, and code snippets. Augmented with on-device Google Gemini AI for smart OCR text extraction.
Deep Feature Flows
Scroll down to watch the cards stack into a physical knowledge deck, sync-updating the live previews.
Dashboard & Active Search
The core hub of your Second Brain. A dual-column layout displays all captured memories, divided into swipeable folder tabs. Instantly filter documents, links, and voice notes with real-time query matching.
Floating Edge Panel Overlay
Trigger quick actions from any application system-wide without changing focus. Instantly type a quick thought, bookmark a URL, or crop a section of the screen for OCR scanning. Position and align it anywhere along the screen borders.
Gemini Screen OCR & Links Hub
Transform screen captures into clean, organized knowledge. Use the regional selector to isolate text or links, and let on-device Gemini AI extract names, URLs, and descriptions into a Checklist ready to save.
Voice Recording & Transcription
Record notes hand-free. Features a minimalist waveform sound visualizer and instant local speech-to-text transcription. Review your memo as structured markdown headers and bullet points.
Smart Categorization & Folders
Group items using custom folders with customizable colors and icons. Click into any memory to view full metadata logs, interactive screenshots, parsed tag directories, and quick editing panels.
Offline Sync & Cloud Backups
Enjoy a robust, offline-first experience with local SQLite caching. Sync your data to Firebase when connected. Monitor cloud backup space, profile statistics, and sync states in one dashboard.
Tech Stack
Built using modern, reliable technologies and designed for speed, security, and offline resilience.
Kotlin
Android
Android Studio
Firebase
SQLite
JSON Storage
Kotlin
Android
Android Studio
Firebase
SQLite
JSON Storage
Figma Design
GitHub Sync
Git Versioning
Markdown Editor
Linux Base
TypeScript
Figma Design
GitHub Sync
Git Versioning
Markdown Editor
Linux Base
TypeScript
App Showcase
Click on any screenshot card to open the interactive walkthrough viewer and examine high-fidelity details.
Main Dashboard
Floating Edge Panel
OCR Intelligence Hub
OCR Area Selection
Voice Memo Recording
Voice Transcription
Universal Link Capture
Folders Manager
Active Search
Saved Memory Details
Profile & Statistics
Storage & Backup
System Settings
Edge Panel Settings
Free & Open Source
Second Brain is fully open source under the AGPL-3.0 License. You can review the code, self-host the storage, and contribute back.