Health Devices

Monitors & Diagnostics

Glucose, heart, and at-home measurement

2 devices. None rests on strong human evidence. Ordered with the best evidenced first.

Oura Ring

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

CGM

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.

2 devices in Monitors & Diagnostics

Oura Ring

CGM