Nielsen is leaning more on wearables to hear what people are watching

Nielsen is expanding its use of smartwatch-style wearable devices to capture more accurate TV viewership data, incorporating readings from these gadgets into its co-viewing measurements starting August 31st. The move aims to help the ratings giant better track audience behavior in an increasingly fragmented streaming landscape.

Nielsen, the long-standing authority on TV ratings, is updating its measurement methodology by leaning more heavily on wearable technology worn by members of its research panels. Beginning at the end of August, data collected from smartwatch-like devices — known as Portable People Meters — will be folded into the company's co-viewing figures, giving Nielsen a richer picture of who is actually watching content and when.

The Portable People Meter program has been around since 2016, originally deployed to strengthen audio and local TV measurement. Now Nielsen is broadening its role as part of a wider push to modernize its ratings infrastructure. With audiences increasingly scattered across dozens of streaming platforms and traditional broadcast declining, accurate measurement has become both harder to achieve and more commercially critical for networks and advertisers alike.

Nielsen has long been the de facto scorekeeper for television audiences, but the explosion of streaming services has put enormous pressure on its traditional measurement tools. In response, the company is doubling down on wearable technology as a key data source, announcing a series of upgrades timed to the upcoming fall TV season — historically the most competitive period on the broadcast calendar.

At the center of this update is the Portable People Meter, a smartwatch-style gadget that panelists wear at home. These devices passively detect audio signatures embedded in broadcasts, allowing Nielsen to log what content a person is exposed to without requiring them to manually log anything. Starting August 31st, readings from these wearables will be incorporated directly into Nielsen's co-viewing data — the figures that track how many people are watching a given program together in the same room.

Co-viewing has become a particularly thorny measurement problem in the streaming era. Streaming platforms typically report individual account activity, which can obscure the fact that multiple people may be watching simultaneously on a single household screen. Nielsen's wearable approach attempts to solve this by detecting actual human presence rather than inferring it from account data.

Why it matters: Ratings data isn't just a vanity metric — it directly determines how billions of dollars in advertising are allocated each year. If Nielsen's numbers are seen as unreliable or incomplete, advertisers and networks lose a shared language for negotiating deals. More accurate co-viewing data could shift how certain programs are valued, potentially benefiting content that draws group audiences, like sports or reality TV, while also giving streaming platforms a stronger case for their viewership claims.

The wearable expansion is part of a broader Nielsen effort to remain relevant as the industry fragments. Rival measurement companies have been gaining ground, and Nielsen itself faced a period of losing its industry accreditation in 2022 over data accuracy concerns. These latest enhancements signal that the company is still investing heavily in proving its numbers can be trusted in a multi-platform world.