# This $399 Ring Reads Your Blood Pressure Without a Cuff

Source: https://idevice.com/signal-ring-gives-blood-pressure-readings-not-just-alerts-like-apple-watch
Published: 2026-07-16

> Vital Signals is shipping a $399 ring in October that claims real blood pressure readings with no cuff needed, ever.

Vital Signals is [shipping a $399 ring called the Signal Ring in October](https://www.bloomberg.com/news/features/2026-07-16/vital-signals-announces-399-signal-ring-that-gives-blood-pressure-readings), built around skipping the cuff entirely, no setup with one and no recalibration either. Founder Tom Moss built the company after a hypertension scare he didn't see coming, convinced people want a real number instead of a trend arrow.

Apple Watch flags a pattern that looks like hypertension but won't show actual systolic or diastolic numbers. Samsung's watches show numbers, but only after cuff calibration. Whoop's top-tier band needs the same calibration plus regular manual check-ins, and some users still report drift. The Signal Ring skips the cuff in both directions.

Getting a reading still means sitting still and manually starting a session in the app, with an auto-pause if you move or talk. Data only shows up once the ring has a connection, since processing happens in the cloud.

Rings have stayed further behind watches on this. Samsung's [Galaxy Ring](https://idevice.com/smart-rings/samsung-galaxy-ring/roadmap/galaxy-ring) doesn't measure blood pressure at all. [Circular Ring 2](https://shop.circular.xyz/products/circular-ring-2), funded on Kickstarter past $1 million, promised blood pressure tracking as a live premium feature, using ECG and PPG sensors together to estimate readings, but the ring has had [mixed reviews](https://gadgetsandwearables.com/2025/03/17/circular-ring-2-blood-pressure/) and [no independent testing has confirmed its accuracy](https://shop.circular.xyz/products/circular-ring-2).

Oura requires a monthly fee to unlock most of what its ring measures. Moss won't charge one, telling Bloomberg [investors have warned him it's a mistake that will sink the company](https://www.bloomberg.com/news/features/2026-07-16/vital-signals-announces-399-signal-ring-that-gives-blood-pressure-readings).

Moss isn't pitching this as a replacement for Oura or Fitbit. He's positioned it narrowly, for people who already have hypertension or are at real risk, and points everyone else toward a mainstream ring or watch instead. The Signal Ring hasn't been cleared by the FDA. The two wearables that have, [Omron's HeartGuide watch](https://www.mobihealthnews.com/news/omrons-smartwatch-blood-pressure-monitor-cleared-fda-launches-january) and [Aktiia's Hilo Band](https://www.medtechdive.com/news/aktiia-josep-sola-otc-blood-pressure/758162/), both still require periodic cuff calibration to stay accurate.

## Sources

- [Bloomberg Technology](https://www.bloomberg.com/news/features/2026-07-16/vital-signals-announces-399-signal-ring-that-gives-blood-pressure-readings) (Bloomberg Technology)
- [Gadgets & Wearables](https://gadgetsandwearables.com/2025/03/17/circular-ring-2-blood-pressure/) (Gadgets & Wearables)
- [MobiHealthNews](https://www.mobihealthnews.com/news/omrons-smartwatch-blood-pressure-monitor-cleared-fda-launches-january) (MobiHealthNews)
- [MedTech Dive](https://www.medtechdive.com/news/aktiia-josep-sola-otc-blood-pressure/758162/) (MedTech Dive)