Smart Glasses Spark Privacy Fears: New App Aims to Detect Hidden Cameras
The rise of smart glasses, particularly those integrated with stylish eyewear brands like Ray-Ban, has brought a new dimension to the age-old feeling of being watched. Since Meta began collaborating with fashion eyewear companies in 2023, these sophisticated gadgets have seen a surge in popularity. However, this technological advancement has also raised significant privacy concerns, with reports emerging of their misuse by individuals, including YouTube pranksters and those engaged in pickup artistry, to film women without their consent.
This growing unease has prompted the development of innovative solutions, such as the “Nearby Glasses” app, created by Yves Jeanrenaud, a sociologist based in Germany. Released on the Apple App Store, this application is designed to detect the presence of smart glasses in one’s vicinity by scanning for their unique Bluetooth signatures. Upon identifying a device emitting such a signal, the app sends a clear notification: ‘⚠️ Smart Glasses are probably nearby.’

Jeanrenaud, who has referred to smart glasses as ‘pervert glasses’ in online discussions, believes that their potential for surveillance is “inevitable.” These advanced glasses are equipped with a range of capabilities, including the ability to capture photos and videos, display applications via an integrated in-screen lens, and even engage in conversations through built-in speakers powered by AI bots. “These smart glasses are largely perceived as some kind of spy product,” Jeanrenaud observed, drawing parallels to science fiction portrayals of such technology in movies and novels. He highlighted that Meta’s Ray-Ban smart glasses are particularly difficult to distinguish from their conventional, fashionable counterparts.
The societal discomfort with pervasive surveillance technology was further underscored by the reaction to Ring’s Super Bowl advertisement for an AI-powered dog detector earlier this year. Jeanrenaud’s concerns were amplified by reports of US immigration officers allegedly using smart glasses during raids, individuals employing them to harass workers at massage parlours, and Meta’s potential plans to incorporate facial recognition technology into its smart glasses. These incidents solidified his resolve to create a tool that could offer some level of awareness and control.
Identifying Potential Surveillance: What to Look For
While smart glasses are engineered for discretion, there are several tell-tale signs that might indicate someone is wearing them, especially if they are actively recording:
- Thicker Frames: The frames of smart glasses are typically more substantial than standard eyewear due to the integrated hardware.
- Indicator Lights: Many models feature an LED light in the corner of the frame that illuminates when a photograph is being taken and pulses when recording video.
- Activation Methods: Capturing photos or videos usually requires a physical button press on the arm of the glasses or a voice command.
- Shutter Sound: A distinct shutter sound often accompanies the taking of a photograph.

How the “Nearby Glasses” App Works
The “Nearby Glasses” app, also available on the Google Play Store and GitHub, requires users to grant permission to scan for Bluetooth devices. It’s important to note that this function does not identify all Bluetooth-enabled devices, such as phones or speakers. Instead, the app is designed to recognise specific signals, or “pings,” that smart glasses emit for pairing purposes.
Jeanrenaud has compiled a comprehensive directory of manufacturer identifiers assigned by Bluetooth to companies like Meta, Snap, and Luxottica Group (the parent company of Ray-Ban). This allows the app to differentiate the signals from smart glasses from other Bluetooth devices. However, Jeanrenaud acknowledges that the app is not infallible and may occasionally generate false positives, potentially identifying devices like virtual reality headsets or smartwatches.
Anna Staddon, social video news lead at a prominent news organisation, tested the “Nearby Glasses” app with her own pair of Meta Ray-Ban smart glasses. “I’d welcome any protections against secret filming, so I decided to give the app a test,” she stated. “It’s super simple to use and really visual, with a little canary telling you if smart glasses might be nearby. But, sadly, the app couldn’t seem to detect my glasses, even when actively recording in close proximity. I wouldn’t totally trust its effectiveness just yet.”

Ethical Considerations and Broader Solutions
The app’s developers and description include a clear warning advising users against employing it to “harass” smart-glasses wearers and urging them to “act accordingly.” Jeanrenaud commented, “In the end, it’s their choice to use such a product and you can make yours on how to deal with it, as long as you have no domiciliary rights of some sort.” He suggested that businesses, such as casinos, stores, or those in the adult industry, might have specific needs for greater control over recording activities within their premises.
However, advocates for women’s safety argue that technological solutions like “Nearby Glasses” are only part of the answer. Rebecca Goshawk, from the women’s aid group Solace, emphasised that smart glasses are merely “one element” of the harassment and abuse women experience. “To truly improve women and girls’ safety, there needs to be a wider education piece for men and boys about boundaries, misogyny and what is and is not acceptable behaviour,” she stated, adding that women should not have to alter their behaviour or rely on apps to feel secure.


Janaya Walker, interim director of the End Violence Against Women Coalition, echoed these sentiments, noting that while apps like “Nearby Glasses” offer some protection, they cannot fully address gendered violence. “We need to see this problem tackled at the root – there must be more responsibility placed on the tech platforms that are enabling the abuse of women with their products,” she urged. “They should be held accountable by government when they fail to anticipate these risks and take steps to prevent them.”
Meta’s terms of service stipulate that users must adhere to all applicable laws and use the Ray-Ban smart glasses in a safe and respectful manner, explicitly prohibiting harmful activities such as harassment and the capture of sensitive information. Meta has been approached for comment.




