Truvark - file encryption
Compared to many other popular alternatives, Truvark...
✓ supports multiple vaults on one device
✓ supports deep folder structures (subfolders)
✓ decrypts common media files (images, video, audio) in-app on the fly
✓ works completely offline, no Internet access/permission required
✓ runs without dangerous permissions like full storage/media access
✓ contains no advertising, telemetry, or other collection of user data
✓ also encrypts the database and thumbnails
✓ allows biometric unlocking (e.g. fingerprint) without compromising security
As you can see, there are already plenty of reasons to give Truvark a try today!
Truvark will soon be fully open source; the cryptographic core has been open source since the previous early access phase.