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Hiyd is a health tracker that attaches to the watch you already wear

Hiyd is a health tracker that attaches to the watch you already wear

techcrunch.com 14.10.2026 21:00 5 views
Former Apple engineers figured out how to get a biometric sensor to attach to your watch without any magnets or adhesives.

If you’re a watch enthusiast, you probably don’t want to exchange your prized timepiece for a bulky fitness tracker. But Hiyd founder Salah Batroukh doesn’t think people should have to sacrifice fashion for function. Our plan is to build out this product ecosystem of invisible health tracking.” Hiyd’s first device to make health tracking look cooler is a small, slim disc that attaches to the back of your watch via microsuction, a material technology that allows the sensor to sit flush under your watch without magnets or adhesive.

That way, it won’t leave any residue or mess with the mechanics of watches that keep time using magnets. So when you press on it, it pushes air out of all those pockets, and you end up with a vacuum — just like traditional suction cups but scaled down incredibly,” Batroukh explained. It’s also incredibly thin at just 0.3 mm with our manufacturing processes.” According to Batroukh, the sensor, which measures 2.7 mm thick and weighs 7 grams, collects biometrics similar to those of leading wearables, including heart rate, heart rate variability, sleep staging, movement, calories burned, and VO2 max estimations, then syncs to an iOS or Android app.

In order to fine-tune the sensor, Hiyd’s team is filming themselves doing various activities, then labeling those data sets to train its AI. The goal isn’t to count calories, but rather to help users glean insights about how their eating habits impact their sleep quality or workout performance. But he wanted to know if he could design something great without the support of a global brand and a multitrillion-dollar market cap.

So far, over 16,000 people have made deposits to secure Hiyd’s first units.

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