hiyd.ai

hiyd.ai By watch enthusiasts for watch enthusiasts. HIYD is an ultra-thin (2.7mm) sensor that attaches invisibly to the case back of your existing watch.

No glue, no magnets, no tools. Get your reservation for our November Kickstarter now at https://HIYD.ai/

08/29/2026

You feelin' lucky?

HIYD attaches to the bottom of any watch, so that makes it a lot easier to make the decision to wear a watch. No compromise.

08/17/2026

You can’t vibe code something in the physical space. A circuit trace being a little too thick can kill your battery. A resistor being barely out of spec can kill your battery’s ability to power on a sensor. Every element of hardware design needs to be nailed down in a way that only works by pushing at the edges of what already exists.

08/12/2026

How much of a “Readiness” or “Recovery” score is arbitrary? Sure, some is, but measuring variation from trends CAN actually tell us important information, even if the exact quantifying of it isn’t always an exact science.

08/09/2026

Apple Watch came out with a bazillion straps for the exact same watch as an attempt to hit a market that they knew they needed - watches are a vibe. They’re a mood. They’re a story. And having one single bracelet as a tracker breaks that. Thats why Hiyd can attach and reattach to any watch.

08/03/2026

A watch is a story teller first, and a time teller second.

07/29/2026

In the age of AI, some things are still worth doing the hard way.

07/24/2026

Watches tell times that tell stories. With Hiyd you can keep the watch on, keep the story, and just learn a new one - one about your health.

07/19/2026

Watches tell time that tells a story.

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430 Navaro Place
San Jose, CA
95134

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