Smart glasses detector app warns if you're being recorded

Smart glasses are built to blend in. Most of the time, they look just like a normal pair of glasses. The difference is that some models can quietly take photos or record video without anyone nearby realizing it.

As these wearable cameras start showing up in everyday places, more people are wondering when they might be on camera. That concern helped inspire a new Android app called Nearby Glasses, which lets you check whether smart glasses may be nearby.

The idea behind the app is simple.