Is Your Teen Hiding Sexting Photos in a gallery locker?

Moms and dads of teenagers: Does your kid seem extra enthusiastic about addition and multiplication these days? I’m sorry to break it to you, but the calculator vault he’s been grinning at all evening may not be the trusty math device that it seems. It could be a digital safe, hiding photos in gallery locker he doesn’t want you to see. Here are some ways to find out.

“calculator vault ” for smartphones have been around for years—they’re a practical way instead of a normal gallery locker to password-protect photos, videos, texts and other files that may be sensitive in nature. But online safety experts are warning parents of the ones disguised as secret calculators. These James Bond-style programs are allowing teens to keep their sexts and browsing history away from prying eyes, namely yours.

When a user downloads one of fake calculators, an icon that looks like a calculator appears on their phone screen. Tapping it leads to an calculator apps. But behind the decoy lies a secret storage space. All the user has to do is type in a password or swipe a finger in a special pattern to access it.

Earlier this year, Apple pulled the popular Gallery locker (Calculator%) from the App store after a police investigation. But more secret calculator apps exist.