Ultrahuman Ring AIR vs Ultrahuman Ring PRO

AIR was Ultrahuman’s slimmed-down R1. According to the company’s 11 June 2024 FAQ, it cut R1’s 2.8 millimeters and 3.6 grams to 2.45 millimeters and 2.4 grams while keeping the same features, accuracy and battery. PRO, the third generation, was announced on 27 February 2026 and spends some of that slimness on battery and memory.

How AIR and PRO compare

Spec	Ultrahuman Ring AIR	Ultrahuman Ring PRO
US price	$349, on Ultrahuman’s comparison table	$479
US availability	AIR’s own US page shows Ring PRO	Pre-order; shipping from 10 October 2026
Battery	4–6 days	Up to 15 days (Turbo about 12, Chill 15+)
Charger	Open wireless pad, about 180 minutes from empty	UltraSnap magnetic pins in the PRO case; USB-C cable in the box
Charging case	None	Included; up to 45 extra days, up to 1 year of data
On-ring storage	4 days, internal flash	Up to 250 days, internal and external flash
Thickness	2.45 mm (2024 FAQ); 2.4 mm (current table)	2.65 mm, varies by size
Weight	2.4 g	3.3–4.8 g
Width	Not published	Not published
Sizes	5–14	5–14, no half sizes
Chip	Single-core	Dual-core, on-chip machine learning
Sensors	PPG, temperature, 6-axis motion sensor	Redesigned PPG, temperature, 6-axis motion sensor
Bluetooth	Bluetooth Low Energy	Bluetooth Low Energy 5.3
Water	100 m (328 ft)	100 m (328 ft)
Phone	iPhone or Android; minimum versions not published	iPhone or Android; minimum versions not published
Finishes	Raw Titanium, Aster Black, Matte Grey, Bionic Gold, Space Silver	Bionic Gold, Space Silver, Aster Black, Raw Titanium

PRO’s upgrade is battery and memory

AIR runs 4 to 6 days, then needs about 180 minutes on its open wireless charging pad to refill from empty. PRO claims up to 15 days, with Turbo mode at about 12 and Chill mode at more than 15, under Ultrahuman’s test conditions. It charges on UltraSnap magnetic pins inside its case, and a one-meter USB-C cable comes in the box. The case carries up to 45 more days of battery for the ring, refills from USB-C or a 5-watt Qi charger, and has a built-in speaker that works with Find My Case.

Memory is the bigger jump. AIR keeps 4 days of data on internal flash, about a long weekend away from your phone. PRO has room for up to 250 days, on internal and external flash, and the case can store up to a year of readings in Chill Mode. That’s the difference between a small buffer and months of history.

AIR is the slimmer, lighter ring

Ultrahuman has published two thicknesses for AIR, 2.4 and 2.45 millimeters, and one weight, 2.4 grams. PRO is 2.65 millimeters thick, varying with size, and weighs 3.3 to 4.8 grams, so even the lightest PRO carries nearly a gram more than AIR.

Neither ring has a US width figure. Some of Ultrahuman’s non-US pages give AIR an 8.1 millimeter width, but those pages blend AIR’s numbers with R1’s.

Ultrahuman’s comparison table lists AIR as titanium plus PVD over a hypoallergenic plastic inner, while the older FAQ says titanium with a tungsten-carbide coating. PRO’s shell is titanium, PVD, epoxy and polycarbonate, and its inner surface is hypoallergenic plastic and titanium. Only PRO lists ProRelease, which Ultrahuman says makes the ring easier to cut apart if a finger swells or gets hurt.

Four finishes overlap: Raw Titanium, Aster Black, Bionic Gold and Space Silver. Matte Grey is AIR’s alone.

Same sizes, same app

Both come in sizes 5 to 14, and your AIR size carries straight over to PRO, which has no half sizes. If you still have an R1 sizing kit, it works for AIR. Ultrahuman’s sizes aren’t Oura’s, so an Oura size won’t transfer.

Both rings track sleep and recovery through the Ultrahuman app with the same three sensor types: PPG for heart data, temperature, and a 6-axis motion sensor. AIR runs them on a single-core chip, and its app features are the same as R1’s, Ultrahuman says. PRO gets a redesigned PPG aimed at deep sleep and recovery, and it moves to two processor cores with on-chip machine learning. Jade AI, which Ultrahuman describes as an upgrade for the app as a whole, appears on PRO’s page. Neither ring is a GPS sports watch.

PRO lists Bluetooth Low Energy 5.3, which Ultrahuman calls EMF-safe; AIR lists Bluetooth Low Energy without a version. Both are rated to 100 meters (328 feet). AIR’s FAQ adds swimming, showering and scuba, and says to avoid continuous submersion longer than 30 minutes; for PRO, Ultrahuman gives only the 100-meter rating.

No subscription, but paid extras

Ultrahuman says you pay once for the ring and its core data, with no recurring fee. That promise sits on the PRO page, so if you find an AIR for sale, look for the same line at checkout. What costs extra is PowerPlugs, the optional add-ons. Ultrahuman listed Cardio Adaptability at $24 a year, and the Cycle and Ovulation Pro module costs extra as well. If either is the reason you want a ring, add it to PRO’s $479 before you weigh it against AIR’s $349.

Price and US availability

Ultrahuman’s US store lists AIR at $349, but only as a column in its Ring PRO comparison. AIR’s old US page now shows Ring PRO, so buying a new AIR in the US could take some searching.

PRO costs $479, or about $120 a month on the financing Ultrahuman offered, and it’s a pre-order. US shipping starts 10 October 2026, and Ultrahuman’s first pre-orders back in February left the United States out. If you need a ring on your finger this week, PRO isn’t it. Check Ultrahuman’s US page for the ship date, finish and price before you buy.