Inside the Ultrahuman Ring PRO: Sensors, Battery, App, and No Subscription

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This article is for general information only and is not medical advice. Readers should consult a qualified healthcare provider for diagnosis or treatment.

Ultrahuman’s pitch is “everything Oura gives you, minus the subscription, plus a bigger metabolic-health story.” That’s marketing — but the hardware actually backs a lot of it up. Here’s what’s inside the Ultrahuman Ring PRO, what you get for the $479 one-time price, and where the gaps are versus the more entrenched competition.

Sensors

Ring PRO uses a refined sensor stack focused on overnight signal quality:

• Redesigned PPG sensor: green and infrared LEDs for heart rate and SpO2, with improvements specifically tuned for sleep and recovery accuracy.
• Skin temperature: contact thermometer for nightly temperature trend.
• 6-axis IMU: 3-axis accelerometer plus 3-axis gyroscope, which gives Ring PRO a slightly richer movement signal than the accelerometer-only rings.
• Dual-core processor with on-chip machine learning: some inference happens on the ring rather than in the cloud, which Ultrahuman uses to claim better real-time signal handling.

One thing Ring PRO does not have: continuous glucose monitoring. The brand’s metabolic-health marketing is real, but the glucose data comes from Ultrahuman’s separate M1 CGM patch, not from the ring itself. The ring app integrates CGM data when you have one, but the ring’s sensors aren’t reading glucose.

Design and dimensions

• Thickness: 2.65mm (varies slightly by size)
• Weight: 3.3–4.8 grams
• Material: titanium outer, hypoallergenic plastic inner with titanium accents
• Sizes: 5 through 14
• Finishes: Bionic Gold, Space Silver, Aster Black, Raw Titanium

It’s a hair thinner than the Oura Ring 4 — Ring PRO at 2.65mm versus Oura at 2.88mm. On the finger they read about the same. Ring PRO’s finishes lean a little more “tech jewelry” than Oura’s, with the Bionic Gold and Aster Black being the standouts.

Battery life

Ring PRO is rated for 4–6 days on a single charge. The interesting part is the PRO Charger: it’s a battery-pack-style charging case rated to keep the ring topped up for up to 45 days off-grid, with up to 1 year of on-charger data storage if you’re traveling and don’t have your phone. That’s overkill for most people but a real differentiator if you do extended travel or don’t want to carry a phone everywhere.

The ring itself stores up to 250 days of data internally, so a missed sync isn’t fatal.

Water resistance

Rated to 100m / 328ft water resistance, the same depth class as Oura. Showering and swimming are normal, deep diving and saunas you’d want to skip.

The Ultrahuman app and what it covers

The app gives you sleep scoring, recovery score, movement index, glucose integration (if you have a CGM), cycle tracking, and a metabolic-health framing that’s the brand’s distinguishing wedge. The “PowerPlugs” model lets you toggle individual feature modules on or off, which is a nicer interface metaphor than the daily-score lock-in some competitors use.

Compatibility: iOS and Android, integrates with Apple Health and Google Health Connect. CGM integration is the standout — if you’ve ever wanted ring data and glucose data in the same app without juggling, this is the cleanest setup currently available.

Subscription model: there isn’t one

This is the headline. $479 one-time, no recurring fee. All app features are unlocked with the purchase, including future updates. If you compare year-three total cost of ownership against an Oura Ring 4 + Membership, Ultrahuman starts to look much less expensive — assuming you don’t separately buy a CGM, which adds its own recurring cost.

Who should buy the Ultrahuman Ring PRO

People who hate subscriptions and want a comparable feature set to Oura without the recurring fee. People interested in pairing ring data with glucose data in a single app. Travelers who would actually use the 45-day off-grid PRO Charger feature. Anyone in the metabolic-health quantified-self world.

Who should skip it

People who want the largest research base behind their sleep algorithms — Oura still wins on academic validation. People who value a more conservative health-data brand voice and dislike the “biohacking” framing in Ultrahuman’s marketing. People who are deep in the Samsung ecosystem and would get more value from Galaxy Ring‘s tighter Samsung Health integration.

The bottom line

The Ultrahuman Ring PRO is the strongest no-subscription competitor to Oura currently on the market. The hardware is solid, the app is mature, and the metabolic-health angle adds something genuinely different rather than just being a cheaper clone. The $479 sticker shock is real — it’s not a budget ring — but the math gets attractive once you compare three-year ownership costs.

Buy the Ultrahuman Ring PRO: Get the Ring PRO →

If you’ve already decided you want a CGM in your life, this is the ring that makes that pairing easiest.

What to read next

• Best Smart Rings of 2026: The Complete Buyer’s Guide — the full 2026 lineup, ranked.
• Oura Ring 4 vs Ultrahuman Ring PRO — the flagship head-to-head most buyers care about.
• Best Smart Rings with No Subscription — the rings that skip monthly fees entirely.

Frequently Asked Questions

Does the Ultrahuman Ring PRO measure blood glucose?
No. The ring measures heart rate, SpO2, temperature, and motion. Glucose data comes from Ultrahuman’s separate M1 CGM patch, which the ring app integrates if you wear one. Ring sensors do not read glucose.

Is there a subscription fee for Ultrahuman Ring PRO?
No. The $479 purchase price covers the ring and all app features with no recurring fee. CGM data, if you choose to use it, is a separate paid product.

What’s the battery life on the Ring PRO?
4 to 6 days on the ring itself. The included PRO Charger holds enough additional charge to keep the ring topped up for up to 45 days off-grid, with up to a year of data storage on the charger.

How does Ring PRO compare to the Oura Ring 4?
Similar core sensors, similar size and weight class, similar water resistance. Oura has the deeper research validation; Ultrahuman has the no-subscription model and the metabolic-health integration. Pick based on whether you prioritize academic credentials or recurring cost.

What sizes does the Ultrahuman Ring PRO come in?
US sizes 5 through 14. Order a sizing kit before you buy — finger sizes for rings worn 24/7 differ from regular jewelry sizing.