How it works

A quiet sensor. A useful daily picture.

ARC is designed to collect signals continuously, compare them with your personal baseline and turn them into clear wellness trends without putting another display on your wrist.

ScreenlessCore app included$0/monthAvailable to order

How it works

Sense. Learn. Guide.

01
Sense
Optical and motion sensors on the underside read signals day and night.
02
Learn
ARC builds your personal baseline over the first weeks of wear.
03
Guide
The ARC App turns changes into clear sleep, recovery and activity trends.

01 · Sense

Collect the signals quietly.

Optical, motion and temperature sensors capture physiological and movement signals without putting another display on your wrist.

Underside of ARC Band showing optical sensors and charging contacts

02 · Learn

Build your personal baseline.

ARC is designed to compare current measurements with your own history so daily context reflects your typical range rather than relying on generic population averages alone.

Latest

54bpm

30 days average

55 bpm

Change over period

-2 bpm

Aug 26Aug 31Sep 5Sep 10Sep 15Sep 20Sep 24

Your typical rangeResting heart rateSample data for illustration. Not a claim about a real user.

03 · Explain

Turn change into useful context.

The app is designed to show specific trends and changes without pretending to diagnose a medical condition.

Recovery, this morning

Sample data

82of 100

Ready for a productive day.

HRV is above your baseline and resting heart rate is steady.

HRV

68 ms

+6% vs baseline

Resting HR

54 bpm

Steady

Sleep

7h 46m

+22 min

Temperature

+0.1°

Within baseline

Daily view

What changed today?

Recovery, sleep, activity and physiological stress are designed to sit together, with the underlying measurements visible instead of hidden behind a single score.