Amazfit Helio Ring vs Samsung Galaxy Ring

Each of these rings is built around one company’s app. Galaxy Ring is a Samsung Health accessory that keeps your data in Samsung Cloud; Helio works through Amazfit’s Zepp app and can share data with some Amazfit watches, though it isn’t a GPS watch itself. Which one you can use starts with the phone in your pocket.

How Helio and Galaxy Ring compare

Spec	Amazfit Helio Ring	Samsung Galaxy Ring
US price (19 September 2026)	$149.99	$399.99; Black, Gold and Silver out of stock by that evening
Phone	Android 7.0 or later, or iOS 14.0 or later, with Zepp	Samsung Galaxy phone with a Samsung account; not iPhone
Sizes	8, 10 and 12 only	5–15
Materials	Titanium alloy outside, resin inside	Titanium
Width and thickness	8 mm wide, 2.6 mm thick	7 mm wide, 2.6 mm thick
Weight	3.65 g, 3.75 g or 3.82 g by size	2.3–3.2 g (US); 3.3 g for size 15 (UK)
Battery	Up to 4 days	6 or 7 days by size; up to 7 days in one Samsung article
Battery capacity	16.5, 18.5 or 20.5 mAh	17, 18.5 or 22.5 mAh, or 18 and 23.5 mAh, depending on the Samsung page
Charging	Wireless charger, about 1 hour 40 minutes; no USB-C cable in the box	Charging case in the box, about 80 or 90 minutes; a full case recharges the ring up to 1.6 times
Water	10 ATM (100 m), ISO 22810:2010; remove for hot showers and saunas	10 ATM and IP68
Sensors	PPG, temperature, EDA, 3-axis accelerometer, 3-axis gyroscope	Optical heart rate, skin temperature, accelerometer
App extras	Sleep stages and score, naps, four sports modes	Energy Score, snore detection, automatic walks and runs
Subscription	None required, says Amazfit; readiness insights need Zepp Aura	None listed on Samsung’s US pages
Data stored on the ring	Not published	Not published
Finishes	Titanium	Titanium Black, Silver, Gold
Bluetooth	Bluetooth Low Energy; 5.0 in the A2321 manual	5.4 in a UK listing

Your phone decides it first

Galaxy Ring needs a Samsung Galaxy phone and a Samsung account, so it’s out if you have an iPhone or another brand of Android phone. A Galaxy phone can run either ring, so for Galaxy owners the choice comes down to size, battery and price.

Helio needs Android 7.0 or later or iOS 14.0 or later. Amazfit lists Bluetooth Low Energy, and the manual for model A2321 gives Bluetooth 5.0. For Galaxy Ring, a UK Samsung listing gives Bluetooth 5.4, a version Samsung’s US pages leave out.

Sizes 5 to 15, or 8, 10 and 12

Galaxy Ring comes in sizes 5 to 15. Helio comes in 8, 10 and 12 only, which Amazfit gives as finger circumferences of 60.3, 66 and 71.3 millimeters, with no 9 or 11 and nothing outside that range.

Samsung has a sizing kit and says to wear the sample for more than 24 hours before you order. Its sizing article says the kit has every available size, though a Samsung sizing video showed nine samples, sizes 5 to 13.

Galaxy Ring is also the narrower, lighter ring: 7 millimeters wide against Helio’s 8, with both 2.6 millimeters thick. Samsung’s US figures put it at 2.3 to 3.2 grams, though a UK listing gives 3.3 grams for size 15. Helio weighs 3.65, 3.75 or 3.82 grams by size, while Amazfit’s fine print says about 3.8 grams for size 10 and about 4 grams for size 12.

Battery and charging

Amazfit rates Helio for up to 4 days of typical use, tested with heart rate and stress checked every 10 minutes, assisted sleep on, and sleep breathing quality and blood oxygen off. Its batteries are 16.5, 18.5 and 20.5 milliamp-hours for sizes 8, 10 and 12. A full wireless charge takes about 1 hour 40 minutes from empty, and the USB-C cable isn’t in the box.

Samsung’s own US pages give three versions for Galaxy Ring. One says up to 7 days, with example batteries of 18 milliamp-hours in size 5 and 23.5 in size 13, and about 80 minutes to charge in the case. Another gives 17, 18.5 and 22.5 milliamp-hours, 6 days for sizes 5 to 11 and 7 days for 12 to 15, and about 90 minutes to charge. The main Galaxy Ring page says 7 days for sizes 12 and 13 and 6 for smaller sizes, and up to 14 days counting a full charging case. Plan on six or seven days.

The charging case comes in the box, matched to your size, and a full case can recharge the ring up to 1.6 times. A completely flat Galaxy Ring may need ten minutes of charging before it works.

Health tracking and the subscription question

Galaxy Ring has an optical heart rate sensor, a skin temperature sensor and an accelerometer. Its sleep tracking uses heart rate, blood oxygen and skin temperature and adds snore detection, and Energy Score in Samsung Health combines sleep, activity and heart rate. Walks and runs can start automatically once you turn that on, and a double pinch dismisses an alarm or takes a photo on One UI 6.1.1 or higher, unless a Galaxy Watch with gestures turned on takes priority.

Helio adds EDA and a 3-axis gyroscope to its BioTracker PPG heart sensor, temperature sensor and 3-axis accelerometer. It tracks sleep duration, light, deep and REM sleep, naps and a sleep score, and lists four sports modes.

Samsung’s US pages list no membership for Galaxy Ring, and its features run in Samsung Health, though that isn’t a promise they’ll stay free. Amazfit says Helio needs no subscription and includes Zepp Aura Premium free, though its fine print says readiness insights need a Zepp Aura subscription.

Neither ring is a medical device. Amazfit says Helio’s readings are for reference only and its Aura content isn’t medical advice, and Samsung says Galaxy Ring’s cycle tracking isn’t for contraception or for anyone under 18.

Water

Both are rated 10 ATM. Samsung adds IP68 and spells out the limits: 10 ATM covers up to 100 meters for 10 minutes, IP68 up to 6 feet for 30 minutes, and you should rinse the ring after salt water or chlorine. Helio’s 10 ATM rating is up to 100 meters under ISO 22810:2010, but Amazfit says to take it off for a hot shower or a sauna.

What they cost

Helio was $149.99 on Amazfit’s US store on 19 September 2026, in sizes 8, 10 and 12. Galaxy Ring was $399.99 on Samsung’s US store earlier that day, when Silver was still listed; by the evening, Titanium Black, Gold and Silver all showed as out of stock. Samsung was also advertising a $150 instant trade-in credit, which is a promotion, not the ring’s price.

That’s roughly $150 against $400 before any trade-in, and stock changed within a single day. Amazfit’s Helio page sometimes shows its Helio System watch marketing instead of the ring, so make sure you’re on the ring, and check both stores, before you buy.