Confirm ARC was being worn
Charging, removing the band or wearing it too loosely can create periods where the sensor cannot collect a useful signal.
Support · Troubleshooting and care
Missing readings and data gaps
A gap does not always mean the device is broken. Start with wear time, fit, power and sync before escalating.
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Check sensor contact
Make sure the underside is clean and flat against the skin. Heavy motion or a rotating band can reduce signal quality.
Check battery state
A low or depleted battery can interrupt sensing before the phone receives the most recent data.
Allow time to sync
Open the ARC app with the band nearby and Bluetooth enabled. Delayed local data may need time to transfer.
Look for a repeated pattern
If the same metric disappears at the same type of activity or time of day, note that context for support.
Do not fill gaps with assumptions
The app should distinguish missing data from measured values. A gap should not be interpreted as a normal or abnormal health reading.
Related help
Need help with your specific ARC?
Contact [email protected] with the relevant order number and a clear description of the issue. Never send passwords, one-time codes or reusable sign-in links.