Vault apps are used to protect photos and other sensitive files should someone get their hands on your unlocked phone. Here are the nine best vault apps to keep your personal photos and other data safe from your eyes only.

As the name suggests, Gallery Lock hides your photos from potential snoopers. A stealth mode hides the app icon, and the camera snaps a photo of anyone who enters the wrong password three times in a row.

Gallery Lock is free, so features like intrusion tracking and stealth mode don’t require you to upgrade to a premium subscription.

Like many of the apps discussed here, Vault won’t show up in your recent apps list and blow your cover. You can also set up two locks (a pattern followed by a PIN). Vault can hide photos, videos, texts, and calls.