The Oura Ring 4 is a titanium smart ring that tracks sleep, activity, stress and heart health from your finger, with a battery Oura says lasts 5 to 8 days depending on ring size and lifestyle. The thing to know before you buy is that Oura sells the ring and a membership separately: as of October 2026, membership is 5.99 US dollars a month or 69.99 a year, with the first month free for new members. It suits people who want sleep insights without wearing a watch to bed.
A ring is a discreet way to track your sleep without wearing a watch to bed, which is what Oura is built around. This review is built from Oura's own Ring 4 and membership pages. I haven't worn one for this page, so I've stuck to what Oura states and the questions that decide whether it suits you.
What you get with the Ring 4
| Feature | What Oura says |
|---|---|
| Build | Titanium inside and out, with a fully round interior and recessed sensors |
| Comfort | Lightweight and non-allergenic, made for 24/7 wear |
| Battery | Between 5 and 8 days, depending on ring size and lifestyle |
| Phones | Works with iOS and Android |
| Finishes | Silver, Black, Brushed Silver, Stealth, Gold and Rose Gold |
| Activities | Detects over 40 activities automatically, with heart rate |
| Membership | 5.99 US dollars a month or 69.99 a year, first month free for new members |
The membership is part of the deal
This is the part to understand before you buy. Oura presents the ring and the membership as working hand in hand: the membership is how the ring's data becomes personalised insights, and it's where you get Oura Advisor, which Oura describes as its AI-powered health companion, plus new features as they're added to the app. Oura's membership page says members can track over 50 health metrics, and it lists the membership as HSA/FSA eligible. If you don't want another monthly subscription, factor that in before you choose a ring.
What the scores tell you
Oura's page explains its Sleep Score as an answer to how you slept, based on total sleep, heart rate variability, nighttime movement, sleep regularity and more. You also get sleep stages each morning, with deep, REM and light sleep, plus bedtime guidance that reminds you when to start winding down. On the activity side, the ring creates a personalised daily goal based on your recovery, and the Activity Score looks at your activity levels and recovery time so you can see whether you're balancing movement and rest.
Everything else Oura tracks
Beyond sleep and activity, Oura's Ring 4 page groups its insights into readiness, stress, heart health and women's health, and the membership page adds daytime stress levels, resting heart rate and longer-term views such as cardiovascular age and resilience to stress. Oura says it has more than 5 million members and a 4.9 App Store rating based on 280k reviews, and its membership page states that your health data is private and secure. Think of it as a wellness tracker that helps you notice patterns, and take anything that worries you to your doctor rather than to the app.
Who the Oura Ring suits
- People who want sleep tracking but find a watch uncomfortable in bed.
- Busy founders who want one simple morning score rather than a wall of data.
- Anyone who'd rather wear jewellery than a gadget at meetings.
- People happy to keep a monthly membership going for the insights.
- Not ideal if you want a screen on your wrist for notifications, because a ring has none.
If sleep's your main reason for buying, my roundup of sleep apps for busy women is worth a look, and my guide to workout apps covers the training side.
My verdict on the Oura Ring
It's a well-made, discreet tracker, and the 5 to 8 day battery means you're not charging it every night. Go in knowing it's a ring plus a subscription, and use the free first month of membership to decide whether the insights change your habits. If they do, it earns its place on your finger; if you only glance at the app once a week, a simpler tracker may do.
Do you make wearables or health tracking apps? Tool makers can ask to be considered for a featured review on this site.
Want AI doing the heavy lifting in your marketing?
I build the systems that handle the boring 80 percent, so you get your week back. Done properly, with the human kept in.
Frequently asked questions
How long does the Oura Ring 4 battery last?
Oura says the Ring 4 battery can last between 5 and 8 days, depending on your ring size and lifestyle.
Do you need a membership for the Oura Ring?
Oura sells the ring and the membership separately and presents them as working together; the membership is where the personalised insights and Oura Advisor sit. As of October 2026 it's 5.99 US dollars a month or 69.99 a year.
Is there a free trial of Oura membership?
Yes. Oura says new members get their first month of membership free.
Does the Oura Ring work with Android?
Yes. Oura lists the ring as compatible with both iOS and Android.
What is the Oura Ring made of?
Oura says the Ring 4 is made of titanium inside and out, with a fully round interior and recessed sensors.
