Cobalt SideDock
Summon instant capture from any app with a gentle screen-edge swipe. Renders at 60/90/120fps on the GPU RenderThread with 0% CPU footprint when resting.
Free & Open Source • AGPL-3.0 • Offline-First
Universal capture & personal knowledge archive for Android.
Eliminate digital fragmentation. Cobalt is your private vault for notes, media, audio memos, and links—featuring the 60/120fps SideDock, Gemini AI OCR region marking, and zero-telemetry local storage.
Engineered for focus and privacy
Everything you capture stays on your device. No user accounts, no cloud sync lock-in.
Gemini AI OCR & Region Marking
Select any rectangle on your screen to extract text, code, or links directly over running apps. Uses your own Gemini API key with zero image storage on remote servers.
Markdown & Continuous Editor
Write notes with standard Markdown syntax, real-time preview, code syntax highlighting, and fast search. Saved as private files in local storage.
Voice Memos & Audio
Record quick audio clips with live waveform visualization. Optional Gemini transcription converts spoken thoughts to clean, formatted Markdown notes.
Media Hub & Trakt Sync
Search movies, TV shows, and anime via TMDb and Jikan. Connect Trakt using secure PKCE authorization to sync watch history, ratings, and watchlists.
Zero-Telemetry Privacy
No analytics SDKs, no tracking pixels, and no automatic crash uploads. Optional third-party API keys and OAuth tokens are protected via Android Keystore (AES-GCM).
Screenshots
Real captures from Cobalt on Android
Service Disclaimers & Attribution
Cobalt uses Trakt but is not endorsed or certified by Trakt.
Cobalt uses the TMDB API but is not endorsed or certified by TMDB.
Anime metadata is powered by Jikan (Unofficial MyAnimeList API). YouTube trailer playback uses the embedded player subject to YouTube’s Terms of Service.