Private photo albums are not an option in the iPhone's native Photos app. Anyone who borrows your phone, can easily open the Photos app to see every picture you've saved. To keep your pictures private, install an app from the App Store. Premium and lite versions are available for several apps that password-protect photos stored in the app. For an extra level of security, some of these apps provide decoy passwords and take snapshots of anyone trying to hack the app.
Download and install the Private Photo app from the App Store on your iPhone. Open the app. The screen displays several folders with titles such as "Family" and "Friends."
Tap the "Settings" button and select "Master Passcode" to set a passcode for the app. Enter the passcode twice as prompted. The app can't be opened again without this passcode.
Tap the "Settings" button again. Select "Decoy Passcode." Enter a different passcode as prompted. Anyone entering this passcode can't see private folders or edit folders in the app.
Create a new folder by tapping the "New" button at the bottom of the screen. Type a name for the folder, like "Private." Toggle on the "Hide Folder Cover" option. This hides the folder from anyone using the decoy password.
Tap the "Private" folder to open it. Tap the "Import" button to import a photo from your Photos app. Alternatively, if you are connected to your computer via Wi-Fi, you can access photos from your iTunes library. You can also take a photo by tapping the "Camera" app at the bottom of the screen.
Select the photos you want to import into the folder and tap "Import."
Open the Settings menu at any time after logging into the app and select "Break-In Reports." Whenever someone unsuccessfully tries to open the app, the app records the date, time and password attempt. The app also takes a picture of the person without using the flash and saves it in the Break-In Report.
Private Photo Vault
Download and install the Private Photo Vault app from the iPhone's App Store.
Launch the app. A tutorial quickly explains the basic process. Enter a passcode when prompted. You can also add an email address that can be used to retrieve a forgotten passcode.
Tap the "Import" button. You can import photos from your Camera Roll or from iTunes on a computer, and you can take a photo using your iPhone's camera from within the app
Select a photo or take a photo. It is placed inside the "First Album" folder.
Close the app. It can't be opened again without the passcode. Additional features such as a decoy password and saving videos are available by purchasing the paid version of the app in the Settings menu.
Secret Photo & Video Manager Lite
Install the Secret Photo & Video Manager Lite app from the App Store on your iPhone.
Launch the app. It prompts you to enter a new password. Type a password and retype it to confirm you typed it correctly. This displays a Camera Roll folder. Note that this folder is not the same as the Camera Roll folder in your Photos app.
Tap the "+" button to add a photo from your Photos app to the app's Camera Roll folder. Alternatively, tap the "Camera" button to take a photo using your iPhone's camera from within the app.
Tap the "Settings" button and then toggle on the "Decoy Enabled" option. Enter a decoy password and confirm it. Anyone using this password to access the app will see your folders but will not see the photos inside. You can upgrade for additional features from the Settings menu.
Information in this article applies to the iPhone with iOS 6.1. It may vary slightly or significantly with other versions or products.