Plus: Masimo sues the US Customs and Border Protection over the Apple Watch's blood oxygen sensor, Insta360 has a new action camera, and BikeOn's power meter is tiny and affordable.

You might love the motivating tempo for workouts or the cadent call for calm that a smartwatch heart rate monitor provides. But when it’s time for an upgrade, what ...

The Harbor Freight MADDOX back-probe kit lets DIYers test automotive sensors safely. Just insert between wire and insulation, ...

Acetone may be best known as a sharp-smelling solvent found in nail polish remover, but inside your body it can tell an important story about health. In fact, the amount of acetone in your breath can ...

Your Apple Watch sensor emits a red light when it is checking your blood oxygen saturation levels, which are a measure of ...

When George Thurston leaves his cottage in the woods of Waccabuc, N.Y., to head for work, a pollution monitor clipped to his ...

A Penn State team created a breath sensor that identifies diabetes by detecting acetone. The device is fast, non-invasive, and built with laser-induced graphene for precision. In the United States, ...

For heart rate testing, Horst used a Polar H10 chest strap as the benchmark. The Apple Watch Ultra 2, running watchOS 26 beta, delivered results that were nearly identical to the strap during indoor ...

A team led by Huanyu “Larry” Cheng, the James L. Henderson, Jr Memorial Associate Professor of Engineering Science and ...

Blood glucose monitoring is an essential tool for managing diabetes. It helps identify how your blood sugar levels respond to factors like diet, exercise, and medications so you can change your ...

A new comparison of smartwatch health sensors has given the Apple Watch Ultra 2 the edge over some of its biggest rivals. The study by bioinformatics scientist Rob ter Horst (The Quantified Scientist ...

Over time, Android and Apple's iOS have evolved to keep up with new security threats that put your personal information at risk. But if you're still using a smartphone that's out of support, you're a ...