Overview
Tagmind is an Android note-taking app built around tags instead of folders. Capture a thought quickly, tag it, and let an LLM help organize and search across everything later — using your own API key, not a bundled backend.
- Quick capture — post-it style note creation with minimal friction
- Tag-based organization — add/remove tags, filter and search by tag
- Ask AI — ask natural-language questions across all your notes, with tappable references back to the source notes and a "save as note" flow for answers
- Multi-provider LLM support — Gemini, Claude, ChatGPT, and Perplexity, with a model selector per provider
- Encrypted search history — past AI queries persist locally via Android Keystore AES-GCM, auto-purged after 30 days
- Soft-delete trash — deleted notes and folders are recoverable before permanent purge
Tech Stack
- Kotlin, Jetpack Compose, MVVM
- Room for local persistence
- DataStore / EncryptedSharedPreferences for secure key storage
- Retrofit / OkHttp for LLM API calls
- User-provided API key — no backend, no server-side data collection
How to Download and Test
Tagmind is currently in closed beta on Google Play. Testing requires three steps, done in this order:
- Join the Google Group — Play Console checks group membership before it lets you opt in, so this comes first. → https://groups.google.com/g/tagmind-beta-testers
- Opt in to the closed test — once you're in the group, open this link and accept becoming a tester; it whitelists your Google account for the Play Store listing. → https://play.google.com/apps/testing/com.youngdevsbin.tagmind
- Install from the Play Store — after opting in, the app becomes installable from its normal Play Store page. → https://play.google.com/store/apps/details?id=com.youngdevsbin.tagmind
Note: if you install before completing step 2, the Play Store page will show the app as unavailable. It can take a few minutes for the opt-in to propagate after step 2.
To actually use the AI features, add your own API key for at least one provider (Gemini, Claude, ChatGPT, or Perplexity) under Settings — the key is stored encrypted on-device and never leaves your phone except to call that provider's API directly.