Secure Data Keeper

Secure Data Keeper helps you store personal information, notes, passwords, and other sensitive text in encrypted form.

Your data can be kept locally on your device or synced through Google Drive. All content is encrypted before it is saved or uploaded, and it remains encrypted while stored in the cloud.

The app uses modern client-side cryptography. Your password is never transmitted over the network, and all encryption and decryption are performed directly on your device.

You can also access the same encrypted data from the web through Personal Cloud Browser:
https://personalcloudbrowser.appspot.com/

Key features:

Strong client-side encryption for personal notes and private data
Local encrypted file storage on your device
Optional Google Drive sync for encrypted data
Password stays on the client and is never sent over the network
Web access to your encrypted data through Personal Cloud Browser
Biometric unlock support on supported Android devices