Apple Watch Series 11, Series 10, Series 9, Ultra 3, and Ultra 2 can detect potential hypertension but only send alerts, not actual readings. Devices like the Oura Ring work similarly. Some fitness gadgets give real numbers, yet require regular cuff calibration.

The new Signal Ring claims to deliver full systolic and diastolic readings Finish its claims with a trial of thousands, without any calibration. It goes on pre‑sale for $399, with delivery in October and no subscription fee. The companion app shows live readings and long‑term trends.

CEO Tom Moss founded Vital Signals after a near‑fatal hypertension scare. He targets older adults or those advised by doctors to monitor blood pressure, noting the ring falls short on other fitness metrics such as sleep tracking.

For people who feel healthy, Moss recommends buying an Oura or an Apple Watch instead of the Ring.