Built by people who train, not just people who design.

Xeilo started with a simple frustration: fitness trackers that quit halfway through a run, a swim, or a set. Smartwatches were bulky, uncomfortable to sleep in, and needed charging every night. We wanted something that disappeared onto your hand and just worked — day and night, in the water, on the trail, through every set at the gym.

The R09 is the result: a titanium-grade steel ring that reads your heart rate, sleep, and recovery around the clock, weighing less than a paperclip and rated 5ATM waterproof. No subscription, no bulk, no excuse to skip a workout because you forgot to charge something.

What we stand for

• Tested through marathons, lifts, and open water — not just a lab bench.
• Built for movement, not just step-counting.
• Zero bulk, all-day wear — you'll forget it's there.

We're a small team, and we're just getting started. If you have questions or feedback, reach out through our Contact page — a real person reads every message.