Above all, you have the option of uploading locked and encrypted data to your Dropbox account. This application is the Swiss Army Knife for privacy of smartphone data. App Lock is the perfect smart lock app for your smartphone. It prevents other users from accessing certain applications on your device. This improved Locker hides and password-protects your sensitive applications on your Android phone. Gallery lock is Vault's newest feature (Hide images and videos). With Gallery Lock's secure gallery, you can now view photos and videos in the Gallery Lock option. The "Hide Gallery" feature makes locking the gallery even better. Vault (Hide Pictures & Videos) allows you to lock photos and lock videos. Create new albums and organize your photos and videos at your convenience. You can also take photos or make videos directly from the application.
Required Android Versions : Ice Cream Sandwich [4.0.3–4.0.4] - Jelly Bean [4.1–4.3.1] - KitKat [4.4–4.4.4] - Lollipop [5.0–5.0.2] - Marshmallow [6.0 - 6.0.1] - Nougat [7.0 – 7.1.1] - Oreo [8.0-8.1]