Valv app
Valv is Multimedia application that is open source under the GPL-3.0-only license. An encrypted gallery vault for Android devices.Features
* Supports images, GIFs and videos
* Organise using folders
* The app requires no permissions
* Encrypted files are stored on-disk allowing for easy backups and transfers between devices
* Supports multiple vaults by the use of different passwords
* Day/night modes
Encryption
Files are encrypted using ChaCha20 and keys are derived using PBKDF2 with HMAC-SHA512.