Samsung Galaxy Ring vs Ultrahuman Ring PRO

Samsung Galaxy Ring is still Samsung’s current ring: as of 19 September 2026 there was no Galaxy Ring 2 page. Ultrahuman Ring PRO is the newcomer, the third-generation ring Ultrahuman introduced on 27 February 2026, and in the US it’s sold as a pre-order.

Spec by spec

Spec	Samsung Galaxy Ring	Ultrahuman Ring PRO
US price	$399.99	$479
Availability	Current model; every finish out of stock the evening of 19 September 2026	Pre-order; US shipping from 10 October 2026
Phone	Samsung Galaxy phone with a Samsung account	iPhone or Android, through the Ultrahuman app
Membership	None	None for core data; paid PowerPlugs
Battery	Up to 6 or 7 days, by size	Up to 15 days (Turbo about 12, Chill 15+)
Charging case	Included; refills the ring up to 1.6 times	Included; up to 45 extra days
On-ring storage	Not published	Up to 250 days
Sizes	5–15	5–14, no half sizes
Thickness	2.6 mm	2.65 mm, varies by size
Width	7 mm	Not published
Weight	2.3–3.2 g	3.3–4.8 g
Water	10 ATM and IP68	100 m (328 ft)
Bluetooth	Bluetooth; 5.4 on Samsung UK’s size-15 model	Bluetooth Low Energy 5.3
Sensors	Optical heart rate, skin temperature, accelerometer	Redesigned PPG, temperature, 6-axis motion sensor; dual-core chip
Finishes	Titanium Black, Silver, Gold	Bionic Gold, Space Silver, Aster Black, Raw Titanium

PRO’s battery claim is more than double

Ultrahuman says PRO lasts up to 15 days on a charge: about 12 in Turbo mode and more than 15 in Chill. Those figures come from its own tests, and Ultrahuman says real results vary.

Galaxy Ring’s number depends on your size, and Samsung’s own pages don’t agree. Its charging guide matches battery capacity to ring size:

Galaxy Ring size	Battery	Rated life
5–7	17mAh	Up to 6 days
8–11	18.5mAh	Up to 6 days
12–15	22.5mAh	Up to 7 days

A second Samsung article, its introduction to Galaxy Ring, puts it at up to 7 days on a ring charged in its case and lists 18mAh for size 5 and 23.5mAh for size 13. Samsung’s US store page, in small print, keeps the 7-day figure for sizes 12 and 13 alone and gives smaller sizes 6, so a size 14 or 15 is rated for 7 days only in the charging guide. Read against any of those, PRO’s 15-day claim is more than twice as long.

Two charging cases, two jobs

Galaxy Ring charges only in its case, which is made for your ring size and tops itself up over USB-C, on a wireless charger or through Wireless PowerShare. Samsung puts a full charge at about 80 minutes in one article and about 90 in another, and a new or fully drained ring may need at least ten minutes before it responds. A full case holds 1.6 complete recharges for the ring, and it fills the ring before itself. Samsung’s marketing adds ring and case together into up to 14 days without a wall outlet, which is the pair, not 14 days on your finger.

PRO sits on UltraSnap magnetic pins in its own case, and the box holds the ring, the charger and a 1 meter USB-C cable. Ultrahuman says the case adds up to 45 days of charge, takes power over USB-C or from a 5-watt Qi charger, has a speaker for Find My Case, and can hold up to one year of ring data in Chill Mode.

On the ring itself, PRO stores up to 250 days of data. For Galaxy Ring, Samsung gives no storage figure at all, which matters if you travel without opening the app.

A Galaxy phone, or any phone

Galaxy Ring needs a Samsung account registered on a Samsung Galaxy phone. You use it through two Samsung apps, Samsung Health and Galaxy Wearable, Samsung Cloud stores what it records, and Samsung UK says Galaxy Wearable isn’t supported on iOS. Ring PRO needs only Ultrahuman’s app, which runs on both iPhone and Android.

The Samsung lock buys you Energy Score, a score built from sleep, activity and heart-rate data; sleep tracking built on skin temperature, blood oxygen and heart rate; snore detection; and automatic walking and running tracking once you switch it on. Pinch your fingers together twice and the ring can dismiss an alarm or trigger the camera for a photo or video, on a phone running One UI 6.1.1 or later. If a paired Galaxy Watch has its own gestures switched on, the watch wins. Energy Score, snore detection and the double pinch are Samsung’s alone.

PRO’s sensors are a redesigned PPG heart sensor, which Ultrahuman aims at better sleep and recovery readings, plus temperature and a 6-axis motion sensor, run by a dual-core chip with on-chip machine learning. It tracks activity but has no GPS. Ultrahuman also pitches Jade AI as an upgrade to its app. PRO uses Bluetooth Low Energy 5.3; Samsung’s US pages just say Bluetooth, and Samsung UK lists version 5.4 for its size-15 ring.

Samsung’s cycle tracking comes with limits: no use as contraception, no users under 18, and less value if hormonal treatment stops ovulation. On PRO, Cycle and Ovulation Pro is a paid add-on. Neither ring replaces a doctor. PRO also has ProRelease: Ultrahuman says the ring can be cut apart more easily if your finger swells or is injured.

Fit, weight and water

Both start at size 5. Galaxy Ring goes up to 15; PRO stops at 14 with no half sizes, and Ultrahuman offers a free sizing kit, warning that its sizes may differ from your jewelry size. If you already wear an Ultrahuman AIR, the same size fits PRO. Samsung’s two sizing sources disagree: a US video shows a kit of nine samples, sizes 5 to 13, yet Samsung’s written sizing guide says the kit has a sample of every size it sells. Either way, Samsung wants you to wear a sample for more than 24 hours.

PRO is the heavier ring, 3.3 to 4.8 grams against 2.3 to 3.2 for Galaxy Ring in Samsung’s US figures; Samsung’s UK figures put a size 15 at 3.3 grams. Thickness is nearly identical: 2.65 millimeters for PRO, varying by size, and 2.6 for Galaxy Ring, which is 7 millimeters wide. Ultrahuman gives no width for PRO.

Galaxy Ring is titanium in three scratch-resistant finishes: Titanium Black, Silver and Gold. PRO combines titanium, PVD, epoxy and polycarbonate, with a hypoallergenic plastic and titanium inner, in Bionic Gold, Space Silver, Aster Black and Raw Titanium.

Galaxy Ring carries 10 ATM and IP68 ratings, but Samsung’s small print caps them at 10 minutes at 100 meters and 30 minutes at 6 feet, and asks for a rinse after salt water or chlorine. Ultrahuman rates PRO to 100 meters (328 feet) and gives no IP code or time limit.

Price, stock and the October ship date

Samsung was charging $399.99 for Galaxy Ring in the US on 19 September 2026. Silver was still listed at that price in the morning, and by that evening every finish (Black, Gold and Silver) showed as out of stock. Samsung was also advertising a $150 instant trade-in credit that evening, which depends on handing something in rather than lowering the ring’s price.

Ultrahuman listed PRO at $479 over the same days, alongside a trade-in worth up to $115 and financing of about $120 a month through Klarna and Affirm. Count $479 as the hardware price, then add any PowerPlug you plan to use.

PRO’s US timing is the catch. Ultrahuman’s US page says shipping starts 10 October 2026, its February launch post had left the US out, and Amazon already had PRO listed on 22 September. Those don’t line up, so check Ultrahuman’s US page, Amazon and Samsung’s store before you buy.