Kopi Jin
A personal grind log. Beans, dials, and dilemmas.
How it works
Everything saves in your browser, on this device. Your data is private — it never leaves your phone.
- No accounts, no cloud sync, no tracking
- Each device keeps its own separate library
- Clearing your browser data will erase your entries
Back up regularly
A small habit that protects you from data loss.
- Tap Backup in the footer to download your library
- Save the file somewhere reliable — email, cloud drive, anywhere
- When the app updates, your data persists — but back up first as a precaution
- Use Restore to bring entries back from a backup file
Add to home screen
For the most app-like experience.
- Open this URL in Safari on iOS or Chrome on Android
- Tap Share → Add to Home Screen
- Launch from the icon — full-screen, no browser bar, persistent storage
Built by @drjkong · v2.2