What exactly is a smart ring?
A smart ring is a wearable the size of a jewelry ring with optical sensors inside. Those sensors constantly measure your heart rate, body temperature, heart rate variability (HRV) and movement.
The key difference from a smartwatch is that it has no screen. All information is processed in the phone app. This has a huge advantage: you can wear it while sleeping without discomfort, in the shower, at the gym or in a meeting without anyone noticing.
Quick comparison of the main models
| Ring | Price | Battery | Subscription | Best for |
|---|---|---|---|---|
| Oura Ring 4 | ~$349 | 8 days | $6/mo | Sleep and HRV |
| Samsung Galaxy Ring | ~$299 | 7 days | No | Android users |
| Ultrahuman Ring Air | ~$249 | 6 days | No | Value for money |
| RingConn Gen 2 Air | ~$149 | 10 days | No | Budget |
What a smart ring measures
Sleep: This is where rings truly shine. They measure sleep stages (light, deep, REM), interruptions and overall quality.
Resting heart rate: A key indicator of your recovery state. If it rises several days in a row, your body needs rest.
HRV (Heart Rate Variability): The most advanced metric. A high HRV indicates good recovery; a low one suggests stress or fatigue.
Body temperature: Very useful for detecting if you're coming down with something or for menstrual cycle tracking.
Is a smart ring worth it in 2026?
Yes, it's worth it if: you have sleep problems, you exercise and want to optimize your recovery, or you dislike wearing a watch on your wrist.
It's not worth it if: you just want to count steps, you need GPS for running, or you have an iPhone and want the Samsung Galaxy Ring (Android only).
Frequently asked questions
Is a smart ring the same as a smartwatch?
No. A smart ring has no screen or notifications. Its function is exclusively passive health tracking. A smartwatch does more things but is less comfortable to sleep in and has less battery.
How long does a smart ring battery last?
Between 6 and 10 days depending on the model. Oura Ring 4 lasts about 8 days, Samsung Galaxy Ring about 7, and RingConn Gen 2 Air reaches 10 days.
Can you use it in the shower and while exercising?
Yes. All main models have IP68 protection. You can shower, swim and do any sport without removing it.
Does the Oura Ring need a monthly subscription?
Yes. Oura Ring costs about $349 plus a $6/month subscription for full analytics. Samsung Galaxy Ring and Ultrahuman require no subscription.
Does it work with iPhone?
Depends on the model. Oura Ring and Ultrahuman have apps for iOS and Android. Samsung Galaxy Ring only works with Android.
Where to buy in the US?
Oura Ring at ouraring.com and Best Buy. Samsung Galaxy Ring at samsung.com/us, Best Buy and Amazon. Ultrahuman at ultrahuman.com.