Wearables & Trackers

Oura Ring · Smart Sleep & Recovery Ring

Finger-worn ring that infers sleep stages, HRV, temperature trends and a daily readiness score

Smart ring wearableGeneral wellness device, not FDA-cleared for diagnosis; Oura pursuing FDA pathways for blood-pressure and metabolic features as of 2025

Whoop · Strain & Recovery Band

Membership-only wrist band that turns nightly HRV and heart rate into proprietary recovery, strain and sleep scores

HRV recovery wearableWHOOP MG ECG software got FDA 510(k) clearance (K243236, April 2025) for AFib detection; a July 2025 FDA warning letter says the Blood Pressure Insights feature lacks clearance. Core strain and recovery scores are unregulated wellness features.

Continuous Glucose Monitor · 24/7 Skin Sensor

A coin-sized arm patch that streams your blood sugar to your phone every few minutes.

Metabolic wearable sensorFDA-cleared as a medical device. Stelo by Dexcom cleared March 5, 2024 as the first OTC glucose sensor in FDA history; Abbott Lingo and Libre Rio cleared June 10, 2024. Prescription CGMs for diabetes long predate these OTC clearances.