Lumo Ring

Smart ring. Sleep, heart rate, oxygen, temperature and activity. No subscription, ever.

$59.00 $129.00

Subscription smart rings: $299 to $499, plus $5.99 a month. Lumo: $59, then nothing.

Color Black Silver Gold

Size 7 8 9 10 11 12 13

Find your size

Lumo Ring comes in US sizes 7 to 13. The ring should feel snug but slide over the knuckle without force. Most people wear it on the index finger, the middle finger works too.

If you already own a ring that fits

Measure the inside diameter of that ring in millimetres and match it below.

US size	Inside diameter	Circumference
7	17.3 mm	54.4 mm
8	18.2 mm	57.0 mm
9	18.9 mm	59.5 mm
10	19.8 mm	62.1 mm
11	20.6 mm	64.6 mm
12	21.4 mm	67.2 mm
13	22.2 mm	69.7 mm

If you do not

Wrap a thin strip of paper around the base of the finger, mark where it overlaps, and measure the length in millimetres. Measure in the evening, when fingers are largest, and go up a size if you land between two.

Wrong size? We swap it

Write to us within 30 days with your order number and the size you need. We ship the new size right away and send a free return label for the first one.

✓Free US shipping. Order today, arrives Oct 1 to Oct 3.

✓Wrong size? Free exchange within 30 days.

✓12-month replacement warranty.

✓Cost over 2 years: $59, against about $440 to $670 for a subscription ring.

Sleep. Light, deep and REM stages, resting heart rate and oxygen from the night, as one morning score.
Heart. Continuous heart rate, day and night.
Oxygen. Overnight trend.
Temperature. Skin temperature next to your baseline.
Activity. Steps and calories, counted from your finger.

Lumo Ring in your size · Charging case, up to 13 charges · USB-C cable. The QRing app is a free download on iPhone and Android.

Free US shipping, 5 to 7 business days, tracking by email. Wrong size? We send the next one within 30 days. If the ring or case stops working in the first year, we replace it.

Why Lumo

One ring. One price. Nothing monthly.

Every score, trend and night of history is included with the ring. There is no app plan, no locked feature, nothing to cancel.

$59

once. Nothing after checkout.

Nothing monthly. Not this year, not next.

4 days

per charge, then 13 more from the case in the box.

Typical use. Case and cable in the box.

5ATM

Shower, swim, sleep. It stays on.

IP68. Not for diving.

See how it compares

Reviews

Worn by people who read the fine print.

Reviews of this ring by US buyers, collected from the marketplace listing where it is also sold. Unedited.

★★★★★

“I was skeptical. The prices of the brands are so expensive and you have to pay a subscription. This has an app just like a smartwatch but better. I love it, so I ordered my husband one as well.”

US buyer
Black, size 10

★★★★★

“It is tracking my sleep, heart rate, stress levels and oxygen and so far it appears to be doing it well. I'm totally satisfied with this purchase and recommend it.”

US buyer
Black, size 10

★★★★★

“I wanted something that was small and unobtrusive, and delivered accurate enough health stats. It delivers that. Battery life seems to be between 6-8 days with constant wearing. Overall, I am incredibly satisfied with my purchase!”

J. R., US
Black, size 11

★★★★★

“He's wearing his wedding band; that's how similar it appears to a wedding band, which I really like. Keeps track of every option very easily.”

M. Y., US
Black, size 11

★★★★★

“1 week of use and I'm loving it! The gold color is discreet, identical to the color and material of my gold Apple Watch. It's waterproof, I wash my hands normally with it on. Highly recommend.”

P. A., US
Gold, size 7

★★★★★

“This is a good ring, first day wearing I liked it. Monitored my sleep. I believe it's as good as the brand.”

U. R., US
Gold, size 8

What it tracks

Five things your body does all day, written down for you.

Sleep

Wake up knowing how you slept

Heart

See your resting heart rate settle

Oxygen

See your overnight oxygen trend

Temperature

See each night’s temperature next to your baseline

Activity

Count the day without a wrist buzz

Compare

What a smart ring costs over two years.

	Lumo Ring	Subscription smart rings	Typical smartwatch
Price	$59	$299 to $499	$249 to $399
App plan	$0, included	$5.99 to $6.99 a month	$0 to $10 a month
Cost over 2 years	$59	about $440 to $670	$249 to $639
Charging case in the box	Included, 13 charges	Usually sold separately	Cable only
Battery per charge	Up to 4 days	4 to 8 days	1 to 7 days
Water resistance	5ATM, IP68	Up to 100 m	Varies
Sleep stages, heart rate, oxygen, temperature trend, steps	Yes	Yes	Most models
Screen on your body	None	None	Yes

Subscription smart ring and smartwatch figures are typical US retail prices and plan fees in September 2026. Battery figures are manufacturer-stated typical use.

Shop the ring, $59 Read the size guide

4 days

on one charge. Then 13 more charges from the case in your pocket.

Charging case and USB-C cable included. Nothing sold separately.

Shop the ring, $59

Wrong size? We fix it.

If the size is wrong, we send the next one within 30 days. If the ring or case stops working in the first year, we replace it. Questions get a human answer by email.

Free US shipping

5 to 7 business days

30-day size exchange

Wrong size? We send the next one

12-month warranty

Ring or case fails, we replace it

Secure checkout

Cards, PayPal and Shop Pay

Shop the ring, $59

FAQ

Questions, answered.

Optical sensors on the inside of the band record heart rate, oxygen and skin temperature through the night, and motion for sleep stages and steps. Treat it as a daily trend, not a lab reading. Wear it on your index or middle finger, snug but not tight, for the most consistent nights.

No. Every reading, score and month of history is included with the ring. The QRing app is free on iPhone and Android and there is nothing to pay after checkout, this year or next.

Order your usual US ring size for the finger you will wear it on; sizes run 7 to 13, whole sizes. The size guide shows how to measure a ring you already own. If the fit is wrong we exchange it within 30 days.

Up to 4 days on one charge with typical use. The case in the box carries up to 13 more charges, so most people drop the ring in the case while they get ready in the morning.

Yes. The ring is rated 5ATM and IP68, so showers, pools and sleep are fine. Take it off for diving.

The ring pairs with the free QRing app on iPhone and Android over Bluetooth. Data syncs while the app is open, and the ring keeps recording when your phone is not nearby.

Orders ship with free US shipping and arrive in 5 to 7 business days. You get a tracking number by email as soon as it leaves.

If the size is wrong we exchange it within 30 days. If the ring or case stops working in the first year we replace it under the 12-month warranty. Write to hello@lumoring.com and a person answers.

Lumo is a small US-facing brand run by its founder. The ring is built by an established smart-ring manufacturer and sold under the Lumo name with our own support, sizing help and warranty.

One ring. One price. Nothing monthly.

Worn by people who read the fine print.

Five things your body does all day, written down for you.

What a smart ring costs over two years.

Wrong size? We fix it.

Questions, answered.

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