MaxVault: Photo Video Vault is a free app that allows you to securely hide photos and videos inside folders, which can only be viewed on a specified device.

If you choose to pay for MaxVault, you will be charged for the cost of the app and you will be charged for each new device (i.e., iPod) that it is installed on.

If you want to lock your device with a passcode, you can do that by choosing the "lock with passcode" option when you install the app.

In addition, MaxVault is integrated with Pocket Files, so you can easily use your photos and videos.

In addition, you can create multiple vaults inside one folder.