Best smart rings: what each maker lists for price, plan, battery and fit

What is a smart ring, and why is Elio in this comparison?

A smart ring is a finger ring with sensors inside. It has no screen. It records heart rate, motion and usually skin temperature, then sends the data to a phone app. The makers read for this page describe titanium bodies and sensors on the inner surface.¹³⁴⁵

Elio is not a ring. It is a screenless wristband made by Chutex, and its page says it can be worn on the wrist or on the upper arm.⁶ It is in this table for one reason: it answers the same question. People who look at rings often want a device with no screen, no notifications lighting up at night, and a battery that lasts more than a few days. A screenless band meets that need in a different shape. It is a comparison point, not a claim that a band is better than a ring.

This page reads the makers’ own US pages on October 16, 2026. Each value sits next to the number of the source it came from. A value the page did not state is written as “not stated on the page read”. There is no ranking and no accuracy score, because none of the makers publishes a comparable one. Prices are before tax, as listed that day, and they change.

One price is missing on purpose. Oura’s ring page, as served to our reader, showed euros only. A euro price is not a US price, so no Oura ring price in dollars appears here. The membership price is in dollars and is included.¹²

How do the rings compare on price, plan and battery?

Two patterns stand out. First, billing: Oura is the one ring on the pages read that uses a membership, while Ultrahuman, RingConn and Elio state no recurring fee and Samsung’s page was silent.²³⁴⁵⁶ Second, battery: the pages range from a seven-day charge at Samsung to up to 15 days at Ultrahuman.³⁴ Elio’s 15 days sits at the top of that range.⁶

Battery claims are not equal across brands. Oura ties its range to ring size and usage, RingConn gives separate figures for small, medium and large sizes, and Samsung adds a footnote for smaller sizes.¹³⁵ If you wear a small size, read the lower figure.

What does each one cost over three years?

A one-time price and a membership are hard to compare until you add the years. The chart multiplies what the pages list. It leaves out accessories and optional extras, and it leaves out Oura’s ring, which has no dollar price on the page read.

Worked example: Oura’s membership alone

Oura lists $69.99 a year or $5.99 a month.² Over three years the annual plan costs 3 × $69.99 = $209.97. Paid monthly, it costs 36 × $5.99 = $215.64. The difference over one year is 12 × $5.99 = $71.88 against $69.99, or $1.89, which matches the page’s “about $2” saving.² Add the ring price from Oura’s own US page before you decide, because that number is not written here.

Worked example: one price against a plan

Take the Ultrahuman Ring PRO at $479 and the Oura membership alone at $209.97 for three years. The membership is smaller than the ring price, but the Oura ring still has to be bought. Once Oura’s ring costs more than $479 − $209.97 = $269.03, the Oura total passes the Ultrahuman total over three years. Since Oura’s dollar ring price is not shown on the page read, check it yourself against that threshold.

Oura says the ring and app still work without a membership, and that you can download your data as a CSV file even then.² That is a clear statement about what you keep if you stop paying. Ask the same question of any ring before buying.

How do sizes, weight and phone support compare?

A ring either fits or it does not, and a poor fit adds noise to the reading. Check sizing before price. Two makers offer a sizing kit on their pages, and both say to wear the sample for at least 24 hours before choosing.³⁵

Phone support deserves a check before you pay. Samsung’s page ties some features to a Samsung Galaxy phone.³ RingConn lists the minimum iOS and Android versions.⁵ Oura lists both platforms.¹ If you use a phone that a page does not mention, ask the maker.

What can a ring measure, and what can it not?

Sensor lists are similar across the pages. Oura lists red and infrared LEDs for blood oxygen, green and infrared LEDs for heart rate, heart rate variability and respiration, a temperature sensor and an accelerometer.¹ Samsung lists an accelerometer, an optical sensor and a skin temperature sensor.³ Ultrahuman lists temperature, a photoplethysmography (PPG) sensor and a 6-axis motion sensor.⁴ RingConn lists heart rate, heart rate variability, blood oxygen, skin temperature and respiratory rate.⁵ Elio lists heart rate, heart rate variability, SpO₂, skin temperature and activity.⁶

All of these are estimates drawn from light and motion at the skin. They are not the same as a sleep study. The NHLBI says adults should sleep between 7 and 9 hours a night.⁷ A ring can show whether you got near that range over a week. It does not record brain activity, so any stage label it shows is an estimate. For more, see sleep stages explained and how sleep scores work.

The FDA’s general wellness guidance covers low risk products that promote a healthy lifestyle.⁸ Rings and bands of this kind are sold on that side of the line. Chutex describes Elio as a wellness band whose measurements are indicative, and says it is not FDA-cleared or FDA-evaluated.⁶ If a symptom worries you, see a health professional rather than a chart.

Which device fits which person?

For the ring against band question in general, read smart ring vs fitness band. For substitutes to the best-known names, see Oura Ring alternatives and WHOOP alternatives. For devices that need no plan, see fitness trackers without a subscription.

Frequently asked questions