Neither product gives you a continuously FDA-cleared blood pressure number: only a component of Hilo Core is FDA-cleared, and Signal Ring has no FDA clearance at all. Hilo Core ($239.98 first year) bundles a real FDA-cleared oscillometric cuff with an optical wrist band that Hilo’s own product page describes as “designed for wellness and awareness, not medical use.” Signal Ring ($399 preorder) skips the cuff entirely and points to a company-run 451-person study meeting the ISO 81060-2 accuracy standard, but is explicit that it “has not yet been reviewed or cleared by the FDA.” If you already own a smartwatch, see our smartwatch blood pressure comparison for that separate category.
At a Glance
- Best if you want an actual FDA-cleared cuff in the box: Hilo Core ($239.98 first year, then $149.99/year) — the included cuff is FDA-cleared; the band’s daily readings between calibrations are not.
- Best published validation data for a cuff-free device: Signal Ring ($399 preorder, shipping October 2026) — a 451-person company study met the ISO 81060-2 standard, but the device itself remains uncleared by the FDA.
- Already have a smartwatch? Apple Watch, Galaxy Watch, and Omron HeartGuide handle this differently — see our full breakdown.
Is the Hilo Core Band Itself FDA-Cleared?
No — only the calibration cuff bundled with Hilo Core is FDA-cleared. Hilo’s own product page states plainly: “The Hilo Cuff is an FDA-cleared blood pressure monitor that provides exact reference blood pressure measurements using an upper-arm cuff.” The wristband is a separate matter: it takes an estimated 30-35 optical readings a day between monthly cuff calibrations, and Hilo is explicit that this side of the system “is designed for wellness and awareness, not medical use” and “does not provide diagnosis, treatment, or clinical monitoring.” The full first-year package costs $239.98 (band plus cuff at $89.99, plus a required 12-month subscription at $149.99), renewing at $149.99/year, or $12.45/month. The subscription isn’t optional add-on convenience, either — per Hilo’s own terms, canceling it drops you to 30 days of limited access to just your last 24 hours of data before new measurements stop working entirely, though historical data stays stored.
Is Signal Ring Clinically Validated for Blood Pressure Accuracy?
Partially, and the distinction matters. According to Vital Signals’ own July 2026 launch announcement, Signal Ring’s optical approach was evaluated in a 451-person clinical study across multiple sites and met the requirements of ISO 81060-2, the international standard used to validate non-invasive blood pressure devices — a genuinely meaningful benchmark, and more published validation data than most optical wearables offer. But that is a company-sponsored study, not an FDA review, and the same announcement states outright that “Signal Ring has not yet been reviewed or cleared by the FDA. It is currently investigational.” The company’s own disclaimer goes further: Signal Ring “is not a medical device and is not intended to diagnose, treat, cure or prevent any disease or condition.” As of publication, Signal Ring is only available for preorder at $399, with initial shipments expected to begin in October 2026 — meaning there is no independent, real-world accuracy record yet outside the company’s own study.
How Do Hilo Core and Signal Ring Compare?
| Hilo Core | Signal Ring | |
|---|---|---|
| Price | $239.98 first year, then $149.99/year ($12.45/mo) | $399 preorder, no subscription |
| Form factor | Wrist band + separate calibration cuff | Finger-worn ring |
| FDA status | Included cuff is FDA-cleared; band’s continuous readings are not | Not FDA-cleared; positioned as investigational |
| Clinical validation cited | Cuff uses standard oscillometric method | 451-person company study met ISO 81060-2 standard |
| Calibration needed | Yes — monthly, against included cuff | No calibration cuff required |
| What happens if you cancel | 30 days of limited (last-24-hour) access, then new readings stop | No subscription to cancel |
| Availability | Shipping now (hilo.com, Amazon) | Preorder; ships October 2026 |
Which Marketing Claims Actually Hold Up? A Claimed-vs-Reported Check
Both companies make specific claims in their own marketing. Here’s each one checked against what the same companies actually publish in their fine print, product pages, and press materials.
| Product | Claim | What’s actually documented | Source |
|---|---|---|---|
| Hilo Core | “The Hilo Cuff is an FDA-cleared blood pressure monitor” | Confirmed true — but this describes the included cuff only, not the band’s day-to-day optical readings | Hilo Core product page, us.hilo.com |
| Hilo Core | Continuous, 24/7-style blood pressure tracking via the band | Band readings are optical estimates the company itself says are “for wellness and awareness, not medical use” and don’t provide “diagnosis, treatment, or clinical monitoring” | Hilo Core product page, us.hilo.com |
| Signal Ring | “World’s first truly cuffless blood pressure tracker” | A real product category claim, but paired with the company’s own statement that the ring “has not yet been reviewed or cleared by the FDA” and is “currently investigational” | Vital Signals launch announcement, PRNewswire, July 2026 |
| Signal Ring | 451-person clinical study met the ISO 81060-2 accuracy standard | Confirmed as reported by the company; ISO 81060-2 is a recognized international BP-device accuracy standard, but this is a company-run study on a product that hasn’t yet shipped to any customer for independent review | Vital Signals launch announcement, PRNewswire, July 2026 |
| Both | Reports/data intended to inform a doctor or user, not replace one | Both companies explicitly disclaim diagnostic or treatment use in their own terms | Hilo Core product page; Vital Signals launch announcement |
Do You Still Need a Traditional Cuff at Home?
Yes, if you want anything you can treat as clinically meaningful. Hilo Core includes one and requires you to use it monthly to keep the band’s readings calibrated — so you’re never fully without a cuff-based check-in. Signal Ring has no cuff at all, which is central to its pitch, but also means there’s no built-in way to periodically ground-truth its optical readings against a traditional oscillometric measurement. Anyone managing diagnosed hypertension should keep an independently validated cuff in the mix regardless of which wearable they choose, and should follow their doctor’s monitoring plan rather than either product’s app.
Which One Should You Actually Buy?
Buy Hilo Core if you specifically want a device shipping today that includes a real, FDA-cleared cuff as part of the package — and you go in understanding that the convenient, continuous band readings between calibrations are wellness estimates, not a clinical number. Buy Signal Ring if a no-subscription, no-cuff-at-all approach appeals to you and you’re comfortable being an early adopter of a preorder product with solid published clinical-study data but no FDA clearance and no shipping units yet. If what you actually want is a smartwatch you already use to double as a blood-pressure tool, neither of these is the right category — read our Apple Watch vs. Galaxy Watch vs. Omron HeartGuide comparison instead.
How We Researched
PicksWeTrust did not physically test either device for this comparison. Our conclusions come from each company’s own current product pages and press materials, re-checked live in August 2026, cross-referenced with 2026 launch coverage from Forbes, Bloomberg, and PRNewswire. Where a company’s marketing headline and its own fine print disagreed on what a product can do, we defaulted to the more conservative, company-stated limitation. You can read more about our process on our editorial standards page.
FAQ
Is the Hilo Core band itself FDA-cleared?
No. Only the calibration cuff included with Hilo Core is FDA-cleared. The wristband’s optical readings between monthly calibrations are a separate feature that Hilo itself describes as being for “wellness and awareness, not medical use.”
How is Signal Ring’s accuracy validated if it has no FDA clearance?
Through a company-run 451-person clinical study across multiple sites that Vital Signals says met the ISO 81060-2 international accuracy standard for blood pressure devices. That’s a real, recognized benchmark, but it’s not the same as FDA clearance, and the company states directly that Signal Ring “has not yet been reviewed or cleared by the FDA.”
Do I still need a separate blood pressure cuff with either device?
With Hilo Core, you already have one — it’s included and required monthly for calibration. With Signal Ring, there’s no cuff at all, so anyone who wants a periodic clinical-grade check, especially with diagnosed hypertension, should pair it with an independently validated cuff of their own.
Has Signal Ring shipped to any customers yet?
Not as of publication. It’s available for preorder at $399, with initial shipments expected to begin in October 2026, so there’s no independent, real-world accuracy record yet outside the company’s own clinical study.
Can I use my smartwatch instead of either of these?
It depends what you need. Neither Apple Watch’s hypertension notifications nor Samsung Galaxy Watch’s blood pressure estimate work the same way as these two dedicated devices — Apple’s shows no number at all, and Samsung’s needs its own monthly cuff recalibration and isn’t FDA-cleared either. See our full smartwatch blood pressure comparison for the honest breakdown.
Curious what your existing smartwatch can and can’t do? Read our Apple Watch vs. Galaxy Watch vs. Omron HeartGuide blood pressure comparison. Browse more in our Wearable Tech category.
