Technology that serves you
We believe devices should work for you, not the other way around. That's why we're building products that require zero maintenance.
Our Mission
Modern wearables are powerful, but they come with a cost: another device to charge, another notification to dismiss, another thing demanding your attention. We think it should be different.
Eternal is building a new category of devices that run entirely on ambient light. No charging cables. No battery anxiety. No maintenance. Just continuous, effortless insight into your health.
Our Story
Eternal started when our founders, researchers at MIT and CMU, asked a simple question: why do health trackers die at the worst possible moments?
After years of research into ultra-low-power electronics and advanced solar cells, we developed technology that can power a full-featured health tracker using nothing but everyday light. Indoor light. Cloudy days. Even a quick walk to the mailbox.
The result is Eternal Band, our debut product: a sleek bracelet that tracks your sleep, activity, and vital signs while charging itself from the light around you.
Our Team
We're a team of engineers, designers, and scientists from some of the world's leading institutions. Our backgrounds span wearable electronics, solar energy, machine learning, and consumer product design.
What We Believe
Simplicity over complexity
The best technology fades into the background. If you have to think about your health tracker, we've failed.
Longevity over disposability
Eternal Band is designed to last 20+ years. We're building products meant to be kept, not replaced.
Privacy by design
Your health data is yours. We encrypt everything, store it on your device, and never sell it.
Honest accuracy
We use research-grade sensors and validate our measurements against medical equipment.
Join Us
We're always looking for talented people who share our vision. If you're passionate about building technology that truly serves people, we'd love to hear from you.
Get in touch