Open-source Android app
Know when camera-capable wearables may be nearby.
Roamer Lens Guard is an open-source Android research project exploring privacy-preserving detection of smart glasses and other camera-equipped wearables.
Public Research Alpha
Lens Guard does not currently claim reliable detection of all smart glasses. Bluetooth presence does not prove recording. Detection rules are only promoted when product-specific evidence survives physical validation and exclusion testing.
Evidence before alerts
Why Lens Guard exists
Cameras are becoming wearable, ambient, and increasingly difficult to distinguish from ordinary glasses. The person being captured usually has no technical boundary of their own.
What it does today
- scans nearby Bluetooth broadcasts locally;
- identifies documented vendor and product evidence;
- distinguishes product identity from recording status;
- records privacy incidents locally;
- supports controlled hardware validation;
- exports privacy-safe evidence for community research;
- broadcasts an experimental anonymous Do Not Capture signal.
What it does not do
- does not jam or interfere with devices;
- does not claim that Bluetooth presence means recording;
- does not connect to or control other people's glasses;
- it will not upload nearby-device data;
- does not retain Bluetooth MAC addresses.
Own smart glasses? Help us test them.
Ray-Ban Meta, Oakley Meta, Snap Spectacles, XREAL, Rokid, RayNeo, Solos, Brilliant Labs, Vuzix and others.
Install the alpha, run a Field Test, and contribute the public-safe evidence capture.