Zuck Off, a free Bluetooth detection app by 30-year-old Polish developer Pawel Szydlowski, tells users whether smart glasses are nearby. In its launch month, it was reportedly downloaded by over 5,000 people on Apple’s App Store. As of writing, it had been downloaded 1,000 times on the Google Play Store.

Zuck Off was built amid scrutiny of unsolicited filming. Szydlowski recorded Bluetooth signals from smart glasses and created a digital fingerprint for each model. He bought the hardware himself to compile the data that flags when a unique identifier matches a manufacturer identifier, catching Ray-Ban Meta, Oakley Meta and Snap Spectacles in the vicinity.

A BBC investigation in January traced dozens of accounts posting content filmed with Meta glasses. One account posted a 21-year-old woman’s face and phone number, amassing over 1.3 million views. The recording indicator light on these glasses has proven fairly easy to defeat with tape, allowing wearers to record without being detected.

Roughly seven million pairs of Meta’s smart glasses were sold in 2025. In July, Meta announced an update to detect when an LED light has been “physically tampered with or destroyed” and stop people from filming with those cameras. Zuck Off cannot tell users whether nearby glasses are recording or who is wearing them, but it offers rough proximity information.