Signal Ring
The Vital Signals Signal Ring is a $399 smart ring, shipping since 2026. Cuffless smart ring that takes direct systolic and diastolic blood-pressure readings from an optical finger sensor without calibration, now shipping finished hardware through an Early Access beta-app option.
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Generations
| Generation | Year | Status | Price | Weight |
|---|---|---|---|---|
| Signal Ring | 2026 | Shipping | $399 | Not disclosed |
Specifications by generation
Signal Ring
2026ShippingCuffless smart ring that takes direct systolic and diastolic blood-pressure readings from an optical finger sensor without calibration, now shipping finished hardware through an Early Access beta-app option.
- Category
- Ring
- Worn
- Finger
- Release
- 2026
- Price
- $399
- Weight
- Not disclosed
- Sensors & hardware
- Biometric
Developer access
- SDK / APINot verified
Early Access is an invite to the consumer beta app on iOS/Android, not an SDK or raw-sensor API. Public developer credentials, protocols and documentation remain unverified.
Not yet verified: documentation, app distribution, vendor-server requirements and hardware and software openness.
Openness, servers & distribution
- hardware
Schematics, mechanical designs and firmware publication were not verified.
- firmware
Source availability and licensing were not established in this review.
- companion apps
Source availability and licensing were not established in this review.
- SDK
Source availability and licensing were not established in this review.
- backend services
Source availability and licensing were not established in this review.
- Vendor servers
A phone connection is required. The linked Shopify privacy policy covers commerce/service processing and does not establish ring-health routing, a local API, self-hosting or backend replacement. These remain unknown.
- App distribution
Third-party app distribution was not verified.
A companion app or integration is not evidence of a third-party app store.
Company & funding
Vital Signals, Inc
Disclosed outside financing; partial history
- Disclosed funding
- Over USD 15M
Company-published cumulative investments; instrument mix not specified. Issuer says over USD 15M investments led by XYZ Ventures. Overlaps reported seed financing; not an additional round. A future Series A fundraising plan is not completed financing.
- Disclosed rounds
- 1
Among makers in the index
Rounds
2026-05-19announced
Seed (reported by Axios)USD 15M
Disclosed 2026-05-18
Led by XYZ Ventures
With Not disclosed
Venture financing; instrument not specified
Axios CEO interview reports USD 15M seed. May 19 issuer total is over USD 15M; do not add these overlapping disclosures.
Valuation not disclosed
No disclosed valuation was established from these sources.
Company
Company release identifies Vital Signals, Inc; Signal Ring is its consumer wearable brand. Parent relationship is unknown.
Brands: Vital Signals, Signal Ring
Investors on record
| Investor | Role | Round |
|---|---|---|
| XYZ Ventures | Lead investor | Company financing disclosed 2026-05-19 |
Not yet verified: valuation.
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Independent index — figures are approximate and editorial, not official spec sheets. Methodology. Last reviewed 2026-10-31.