You only have to export the photos you want to hide from the gallery to the program, and only you or whoever knows your PIN number will be able to access it.
This company is focused on giving us privacy and hiding photos and videos from our iPhone and iPad (although, of course, it also works for iPod). Vault is one of the best photo vault app designed by KeepSafe (the team has an Android version). And if someone tries to access your secret photos and makes a mistake, they will automatically take a photo with the front camera that will be sent to your email along with the GPS location of the intruder.
