HALO One
TIME, REDEFINED
A health instrument disguised as a watch.
Continuous sensing
KNOW YOUR BODY
Skin temperature. HRV. SpO₂. Around the clock, not on request.
Scroll to dissect
The numbers that matter
0-day
Battery
GPS and always-on display included
0 g
Grade-5 titanium
Case, crown and clasp
0 Hz
LTPO display
Down to 1 Hz when resting
0.0 mm
Sapphire crystal
Optically bonded, zero air gap
Capability
Everything it does, it does quietly.
No streaks to keep. No badges to earn. HALO One measures, learns, and tells you only what changes your day.
Sleep
Sleep architecture
A full hypnogram every night — awake, REM, core and deep — built from movement, heart rate and skin temperature. Last night: 7 h 12 m, 22% deep.
Recovery
Readiness score
Ready to train.
HRV stable, resting heart rate −2 bpm overnight.
Precision
Dual-band GPS
L1 + L5 reception holds the line through street canyons and tree cover. Your route, as you actually ran it.
Water
50 m water resistance
Pool, ocean, and the shower you forgot about. Swim tracking comes on automatically when you do.
Safety
Crash detection
A high-g accelerometer recognises hard falls and impacts, then calls your emergency contact if you don't respond.
Heart
On-wrist ECG
A 30-second single-lead ECG from the crown, with rhythm classification you can export as a PDF for your cardiologist. Cleared, not gamified.
HALO Membership
Data is cheap. Insight isn't.
HALO Membership turns a year of continuous sensing into plain sentences — written by models trained on physiology, reviewed against clinical guidance, and delivered without a single push notification you didn't ask for.
Morning briefing
One card at sunrise: how you slept, how recovered you are, and what today can hold.
Trends that mean something
Skin-temperature drift, HRV baselines and overnight respiratory rate — tracked across months, flagged only when they move.
Clinician-ready exports
ECG strips and trend reports as clean PDFs. Bring data to your doctor, not screenshots.
$9/month. Three months included with every HALO One. Cancel anytime; your data stays yours.
Finishes
Three finishes. One alloy.
Every HALO One is grade-5 titanium. Pick the surface treatment; the 38 grams stay the same.
Midnight Titanium
Microblasted, near-black. Disappears under a cuff.
HALO One
$429
Fluoroelastomer band
Included
Reservations open
Reserve HALO One.
$429 · ships autumn 2026 · three months of HALO Membership included. A reservation holds your place, not your money.
Fully refundable. No card required. One email, no newsletter.