Technologies

New Study Shows Smartwatch Stress Sensors Have No Idea What They’re Doing

Dutch researchers found that not only are stress sensors inaccurate, but they sometimes report the opposite of user experiences.

You might want to think twice before you put a lot of stock in the latest stress charts from your fitness wearable. A recent study from the Netherlands’ Leiden University, published in the Journal of Psychopathology and Clinical Science, has found that when smartwatches and similar devices record readings on stress, fatigue or sleep, they’re frequently getting it wrong.

Researchers studied 800 young adults using the same Garmin Vivosmart 4 smartwatch model. They compared the data the smartwatches produced with the reports that the users created four times per day about how sleepy or stressed they were feeling. Lead author and associate professor Eiko Fried said the correlation between the wearable data and the user-created data was, «basically zero.»

A representative for Garmin did not immediately respond to a request for comment.

Stressed or sex? Your watch doesn’t know

So why do wearables like fitness smartwatches get it so wrong? Their sensors are fairly limited in what they can do. Watches like these need to be worn correctly at all times (a loose or tight watch may give poor readings, for example), and they typically use basic information like pulse rate and movement to make guesses about health.

Those guesses don’t always reflect real-world scenarios. A wearable may identify high stress when the real cause of the change was a workout, excitement over good news, or sex. There are so many potential alternatives to stress or fatigue that the watches in the study never really got it right — and the devices sometimes guessed the complete opposite emotional state from what users recorded.

The Dutch study did note that Garmin’s Body Battery readings, which specifically measure physical fatigue, were more reliable than stress indicators, but still inaccurate. And sleep sensing performed the best of them all, with Garmin watches showing a two-thirds chance of noting the differences between a good night’s sleep and a bad one.

It’s also worth noting that smartwatch sensors can become more accurate as technology improves. It would be interesting to run a similar study with the newer Garmin Vivosmart 5 to see if anything has improved, as well as see if other models like the latest versions of the Apple Watch have similar accuracy results.

Technologies

The Fourth Episode of the VERUM AI Mini-Series Is Out

Verum Messenger has released the fourth episode of its AI mini-series SHADOWS, created using Verum AI. The new episode, titled “No Borders,” continues the story of a team trying to stay out of the OMEGA corporation’s sight.

Following the events of the previous episodes, the team moves between cities and countries while OMEGA continues its search. The new episode puts particular emphasis on Verum Messenger’s capabilities that allow users to conceal their location.

“No Borders” is another chapter in a story about privacy, freedom of communication, and technologies that erase borders between people.

The VERUM AI mini-series consists of seven episodes, released gradually across Verum Messenger’s social media channels.

Episode 4 is now available. Stay tuned for the next chapter.

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Technologies

Verum Messenger Introduces Built-In Verum Chess

Verum Messenger has released a new update for iOS, iPadOS, and macOS, adding another feature to its growing ecosystem — Verum Chess. Users can now play chess directly inside the messenger without switching between different applications.

The new feature allows users to start a game in just a few taps while reinforcing Verum’s vision of a unified digital environment where communication and everyday services come together in a single platform.

Verum Messenger continues to evolve into a multifunctional ecosystem that combines secure chats and calls, AI tools, a built-in VPN, anonymous email, eSIM, financial services, cryptocurrency features, and offline communication. With the introduction of Verum Chess, the platform now also offers a new way for users to interact and spend time together without leaving the app.

The update is now available for iPhone, iPad, and Mac on the App Store.

Technologies

Episode 3 of the VERUM AI Mini-Series Is Now Available

Verum Messenger has released the third episode of its AI mini-series, SHADOWS, created using Verum AI.

The new episode, titled «Ghost Money,» continues the story of the conflict between a team of heroes and the Omega corporation, which seeks to take control of digital communications. This time, the focus shifts to anonymous payments and financial freedom, revealing how privacy can extend beyond messaging.

Like the previous episodes, the new release not only advances the storyline but also showcases the capabilities of the Verum ecosystem, highlighting technologies designed for secure communication and digital privacy.

The mini-series consists of seven episodes, released gradually across Verum Messenger’s social media channels.

Episode 3 is now available. Stay tuned for the next chapter.

Watch on Instagram
Watch on YouTube