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Product guide

Ultrahuman Ring AIR Smart Ring

The ULTRAHUMAN Ring AIR is a subscription-free smart ring for tracking sleep, activity and health-related metrics through the Ultrahuman app. Its screen-free design and listed six-day battery life suit buyers who want data on a phone rather than a wrist display, but the listing advises using the brand’s sizing kit because its sizes differ from standard ring sizes.

At a glance

Standard app features are listed as subscription-free, including sleep, activity, stress, heart rate, HRV, skin temperature and recovery tracking.
The listing describes sleep-stage insights and sleep-debt tracking through the app.
The listing claims cycle, ovulation and pregnancy-related insights, including a seven-day fertile window.
No display means readings and insights are accessed on a compatible phone.

Price

£199.00Save 40%

Reference price: ~~£329.00~~

Price checked: 14 Nov 2026

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Pros and cons

Pros

No subscription is required for the standard features described in the listing.
A broad set of health and sleep metrics is presented in the companion app.
The listing gives a six-day battery-life estimate and a two-hour charging time.

Cons

There is no display, so checking information requires the companion app.
GPS is listed as unavailable, so the ring itself is not presented as providing GPS tracking.

Technical specifications

24 specifications

Identity
Brand	ULTRAHUMAN
Model	Ultrahuman Ring AIR

Display and tracking
Display	No Display
Listed metrics	Blood Oxygen (SpO2), Body Temperature, Heart Rate, Sleep Duration, Stress
Listed features	Activity Tracker, Lightweight, Multisport Tracker, Sleep Tracker

Connectivity and controls
Wireless connection	Bluetooth
Control method listed	Ultrahuman App
Compatible phones	iPhones running iOS 15 or later and Android devices running Android 6 or later

Power and battery
Battery life listed	6 days
Battery type	Lithium Polymer
Battery capacity	24 Milliamp Hours
Charge time	2 Hours

Dimensions and materials
Form	Round
Dimensions listed	22 x 18 x 15 millimetres
Weight listed	400 Grams
Case material	Titanium
Colour	Aster Black

Protection
Water resistance listed	Water Resistant
Waterproof rating listed	IPX8
Water resistance depth listed	1 Metres

Other listed specifications
Storage listed	0.5 MB
GPS	No GPS
Warranty	1 year
Warranty type	Limited

What to know before buying

The listed weight of 400 Grams appears unusually high for a ring, but the supplied listing does not clarify whether this is a product or packaging measurement. Confirm the intended figure if weight matters.

Listing details to confirm

The listing says Ring AIR sizing differs from standard ring sizes and recommends using the Ultrahuman sizing kit first. It describes ten sizes, 5–14. The selected listing does not confirm that a sizing kit is included. The listing is inconsistent about water protection: it gives “Water Resistant”, “IPX8” and “1 Metres” as separate claims. Confirm the applicable water-use guidance before relying on a specific depth or rating. The product listing describes a battery life of six days, while actual runtime will depend on use. The listed figure is a manufacturer claim, not an independently verified result.

What’s in the box

Included

1 x Black Ring

Who is it for?

A good fit for

People who want sleep, activity and health metrics in a phone app without paying a standard-feature subscription.
Buyers looking for a screen-free wearable and willing to check insights on a compatible smartphone.
Users interested in the listed sleep-stage, recovery and cycle-related tracking features.

Less suited to

Anyone who wants a display on the wearable or GPS listed as part of the ring.
Buyers who prefer a standard ring-size fit without sizing checks.

Ultrahuman Ring AIR Smart Ring · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.1 / 5 · 1,103 ratings

5 stars66%66%
4 stars12%12%
3 stars5%5%
2 stars6%6%
1 star11%11%

Customer feedback highlights perceived battery life, data quality, health tracking and sleep insights, alongside appreciation for the subscription-free standard features. Those reports align with the listing’s six-day battery claim and app-based metric tracking, but do not independently establish their accuracy or runtime. Feedback is mixed on reliability and connectivity, and customers differ on whether the ring justifies its cost. The aggregate rating is generally positive but includes a meaningful spread of lower ratings, so individual experience may vary.

Positive themes

Customers report appreciating battery life, data quality, health tracking, sleep tracking and the subscription-free standard features.

Mixed feedback

Feedback on reliability and connectivity is mixed.
Opinions on value for money vary.

Frequently asked questions

Does the Ultrahuman Ring AIR require a subscription?

The listing says its standard app features, including sleep, activity, stress, heart rate, HRV, skin temperature and recovery, are available without a subscription.

How long does the battery last?

The listing gives a battery life of 6 days and a charge time of 2 Hours. These are manufacturer-listed figures, not independent measurements.

Does this ring have a screen or GPS?

The listing specifies No Display and No GPS. The ring uses Bluetooth and the Ultrahuman app for its listed tracking features.

Should I use a sizing kit before ordering?

Yes. The listing says Ring AIR sizes differ from standard ring sizes and recommends using the Ultrahuman sizing kit to choose a fit. It does not confirm that the kit is included.