A free app for Android, by Yo Android.

Yo Vault is an application that allows you to create a secure area where you can store your photos, videos, and other files. This is perfect for those who want to keep their personal files safe from hackers and other unauthorized users.

This application has a very intuitive interface to help you hide your personal photo or videos easily. In the app, you can provide a PIN or fingerprint lock to ensure no one else can access your private files.

If you are looking for the best and most secure app, then Yo Vault is the right one.