ZuckOff: Bluetooth-Based Detection for Meta Smart Glasses

ZuckOff detects smart glasses via Bluetooth fingerprints

ZuckOff is a free mobile application designed to alert users to the presence of smart glasses in their immediate vicinity. Developed by Polish developer Pawel Szydlowski, the app works by scanning for the specific Bluetooth signals broadcast by various smart glasses models and matching them against a library of digital fingerprints. The app can identify devices including Ray-Ban Meta, Oakley Meta, and Snap Spectacles.

While the app can provide rough proximity information based on signal strength, it has two primary limitations: it cannot determine if the glasses are currently recording, nor can it identify the specific individual wearing the device.

Technical implementation and availability

The developer created the fingerprint database by purchasing the hardware and recording the Bluetooth signals broadcast by different models. Because the app reads signals that are legally broadcast by the devices, it is difficult for manufacturers to legally block the app's functionality.

ZuckOff is available on both the Apple App Store and Google Play Store. The app offers a free basic scanning feature, while a "Pro" version provides advanced capabilities, including:

• Continuous background monitoring
• System widgets
• Real-time alerts
• Sighting history
• CSV export of detected devices

The conflict over covert recording and LED indicators

The rise of smart glasses has increased concerns regarding unsolicited filming in public spaces, leading some venues, such as cinemas and schools, to ban the devices. A central point of contention is the recording indicator LED, which is intended to signal to others when a camera is active.

Meta's countermeasures

Meta has attempted to address the issue of users covering the LED with tape to record covertly. According to a July 2026 announcement, Meta is pushing updates to detect when the capture LED has been physically tampered with or destroyed. If the system detects that the LED is blocked or destroyed, the camera is automatically disabled to prevent filming.

Privacy concerns and critiques

Despite these safeguards, the proliferation of these devices—with roughly seven million pairs of Meta smart glasses sold in 2025—has led to significant privacy debates. Critics argue that the product's commercial appeal relies on the camera not looking like a camera, which contradicts the goal of making recording obvious to bystanders.

Community perspectives and counterpoints

Discussion among technical users highlights several practical and conceptual challenges regarding smart glasses detection:

• Connectivity Requirements: Some users question the utility of the app if a wearer records video and uploads it later, as the device would not need an active network connection (WiFi/Bluetooth) at the time of recording.
• Pairing Mode Limitations: There are claims that such detection may only be effective while the glasses are in pairing mode, which would significantly limit the app's real-world utility.
• Alternative Tools: Other open-source alternatives exist, such as the yj_nearbyglasses project on GitHub.
• Comparison to Smartphones: Some argue that the panic over smart glasses is misplaced, noting that smartphones are already widely used for covert recording and are more versatile in how they can be positioned to record without the subject's knowledge.

"I think the panic around smart glasses cameras is so strange, it's SO much easier to be a creep with a phone recording... Everyone is already on their phones anyhow."

• Social Impact: Some users view the devices as useful for capturing memories on vacation, while others suggest that the presence of such devices in "audit" videos (where creators record public interactions) creates a contradiction when those creators use hardware from large corporations like Meta.