KuroNote — a fast note app even we can't read
Simple notes that open instantly. Text and images are encrypted with a key only your device holds — not even we can read them. Free on a phone alone.
KuroNote cuts every feature that slows down note-taking. There is no dashboard in the way: open the app and start a note right from your list. Every note and image is encrypted with your device's key before it is stored or sent, so the contents stay private even if the server is breached or a staff member turns malicious.
Features#
- Open it and start writing — tap “New note” in the list
- No folders to create — automatic folders grow from keywords in your notes; add #keyword to file one explicitly
- Auto-sync between phone and PC — subscribing to the dedicated server also unlocks the browser version
- Zero knowledge — the server stores only ciphertext and can neither search nor preview it
- End-of-life care — optionally delete the account 60 days after payments stop (with the server plan)
- Available in 10 languages
Pricing#
| Phone only | Free (back up to your own Dropbox, Google Drive, etc.) |
|---|---|
| Remove ads | ¥800 one-time |
| Dedicated server (phone + PC) | ¥100/month in Japan; US$1.00 / EU €1.00 base, priced per store elsewhere |
| Availability | Coming soon to the App Store and Google Play |
If you lose every passkey and your recovery code, not even we can restore your data. We recommend registering passkeys on more than one device.