Fitness rings · Model guide · Maker specs
Oura Ring Gen3
Oura no longer sells Ring Gen3 or its charger, so new buyers should get Ring 5, or Ring 4 for sizes 4, 5, 14 and 15 instead.
Product images
Oura Ring Gen3, from its Amazon listing.
Credit: Amazon.com (Associates Program). Amazon listing
Product image from the Amazon listing.
In short
Oura no longer sells Ring Gen3 or its charger, so new buyers should get Ring 5, or Ring 4 for sizes 4, 5, 14 and 15 instead. If you already own one, keep it: Gen3 got firmware 3.4.3 on 20 April 2026 and is rated for up to seven days per charge. It needs an Oura Membership for most of the app, unless your account kept a legacy Lifetime Membership.
Who it is for
- Gen3 owners deciding whether to upgrade. It still gets firmware, and with a membership it has the same feature list as Oura's newer rings.
- Owners whose account still carries a legacy Lifetime Membership, as some Gen3 accounts do.
- Second-hand shoppers who find one with its charger included, since Oura no longer sells the Gen3 charger.
Who should skip it
- Anyone shopping new. Ring 5 is the current Oura, and Ring 4 and Ring 4 Ceramic are still on sale.
- Anyone who won't pay for a membership. Oura Membership applies to Gen3 and every ring after it; Oura says the older Gen2 doesn't need one.
What sets it apart
- The first Oura with daytime and workout heart rate, from green, red and infrared LEDs, plus an extra NTC temperature sensor for Cycle Insights. Gen2 measured heart rate only at night.
- Two shapes: Horizon, worn with the dimple toward your palm, and Heritage, worn flat side up.
- Still supported: firmware 3.4.3 arrived on 20 April 2026, after 2025 and 2026 builds that changed workout tracking and nap detection.
- Up to seven days per charge and up to a week of stored data, Oura says.
Caveats
- The charger is discontinued too, so if yours breaks, Oura won't sell you another Gen3 charger.
- A Lifetime Membership doesn't come with a used ring. It's a legacy promo tied to some Gen3 owners' accounts, and Oura doesn't sell it now.
Key specs
In the same order on every ring page, so you can compare models.
| Spec | Value | Source and notes |
|---|---|---|
| Materials | Titanium with PVD (Gold, Silver, Rose Gold, Brushed Titanium) or DLC (Black, Stealth); non-allergenic, non-metallic seamless inner molding, BPA-free | Oura, Previous Oura Ring Generations (updated 13 May 2026) |
| Sizes | No Gen3 size list from Oura. Its safety guide gives battery capacities from 15 mAh (US6) to 22 mAh (US13) for “Oura Ring” in general | Previous Oura Ring Generations; Product Safety & Use (updated 19 June 2026) |
| Finishes | Horizon and Heritage, in Black, Brushed Titanium, Gold, Rose Gold, Silver or Stealth (matte black) | Oura, Previous Oura Ring Generations |
| Battery | A fully charged Gen3 can last up to seven days | Oura General FAQs (updated 18 September 2026); Ring Battery TipsVaries with ring size, settings, activity and battery age. |
| Charging | 20–80 minutes, Oura's general figure for its rings. On the Gen3 charger, line the sensor bumps up opposite the charger light | Oura General FAQs; Use Your Oura Ring Charger |
| Charging case | USB charger with color-coded LEDs, now discontinued. No travel case | Previous Oura Ring Generations; General FAQs |
| Water resistance | Oura's general rating for current rings: 100 m; showering, swimming, recreational diving and snorkeling are fine; no scuba; don't leave it submerged for more than 12 hours. No separate Gen3 rating | Oura General FAQs (updated 18 September 2026); Product Safety & Use |
| Sensors | Green, red and infrared LEDs (daytime and activity heart rate); extra NTC temperature sensor; extra infrared alignment sensor; accelerometers | Oura, Previous Oura Ring Generations |
| Sleep tracking | Detailed sleep analysis with membership; Blood Oxygen Sensing (SpO2) is on the Gen3 feature list | Previous Oura Ring Generations; Oura Membership support |
| Activity / fitness | 24/7 heart rate (day, night and during activity); Automatic Activity Detection; dynamic activity goals (membership) | Oura, Previous Oura Ring Generations |
| App | Oura app | Previous Oura Ring Generations; Set up the Oura App |
| Subscription / data access | Oura Membership applies to Gen3 and newer (US $5.99/month or $69.99/year; 1 free month for new members). Some Gen3 accounts still have a legacy Lifetime Membership | Oura Membership support (updated 8 September 2026) |
| Phone platforms | iOS 16 or later, or Android 11 or later with Google Play; the phone must support Bluetooth 5.0 | Oura General FAQs; Product Safety & Use |
| Wireless | Bluetooth, for pairing with the app; Oura doesn't give the version | Previous Oura Ring Generations; General FAQs |
| On-ring storage | Up to one week (seven days) | Oura Product Safety & Use (updated 19 June 2026) |
| US price | No longer sold by Oura; not on its US store on 19 September 2026 | Previous Oura Ring Generations; Oura store |
| Price band | Discontinued membership ring | Previous Oura Ring Generations; Oura store |
| Availability | Discontinued: the ring and its charger are no longer for sale | Oura, Previous Oura Ring Generations (updated 13 May 2026) |
Oura Ring Gen3 extras
Specs only this model has.
| Spec | Value | Source and notes |
|---|---|---|
| Horizon vs Heritage | Horizon: wear it with the dimple toward your palm, the same cue as Ring 4 and Ring 5. Heritage: flat side on top of the finger | Oura General FAQs; Product Safety & Use |
| Latest firmware | 3.4.3 (20 April 2026): internal optimizations and bug fixes. Earlier 2025 and 2026 builds changed workout tracking and nap detection | Oura Device Firmware Versions (updated 17 June 2026) |
| Versus Gen2 | Gen3 adds daytime and activity heart rate, the extra NTC sensor, SpO2 and the membership. Gen2 measures heart rate at night only, with infrared, and doesn't require a membership | Previous Oura Ring Generations; Oura Membership support |
| Battery capacity | Rechargeable, non-replaceable lithium-polymer battery, 15 mAh (US6) to 22 mAh (US13), listed for “Oura Ring” in general rather than Gen3 alone | Oura Product Safety & Use (updated 19 June 2026) |
Where Gen3 fits now
Gen3 is the Oura that came before Ring 4, in two shapes: Horizon and Heritage. Oura has stopped selling it, along with its charger, and its US store now carries Ring 5, Ring 4 and Ring 4 Ceramic. If you’re replacing a Gen3, Ring 5 is the current model and works with the same app and membership; Ring 4 is the one that still comes in sizes 4, 5, 14 and 15. Ring 4 is 7.9mm wide and about 2.88mm thick and weighs 3.3–5.2 grams; Oura doesn’t publish those measurements for Gen3, so there’s no exact comparison. Oura Ring 4 vs Oura Ring Gen3 compares the two side by side.
What it tracks
Gen3 tracks heart rate around the clock, including during workouts, with green, red and infrared LEDs. It also has an extra NTC temperature sensor, an extra infrared alignment sensor and accelerometers. With a membership you get the same features as Oura’s newer rings: detailed sleep analysis, 24/7 heart rate, blood oxygen, Stress, Heart Health and Women’s Health. As with every Oura, the readings are for wellness: Oura says the ring isn’t a medical device.
Battery and charging
Oura says a fully charged Gen3 can last up to seven days, and the ring stores up to a week of data, so it can go a while between syncs. It charges on a USB charger with color-coded LEDs: line the ring’s sensor bumps up opposite the charger light. Oura gives 20–80 minutes as a charge time for its rings in general, without a Gen3-specific figure. Its safety guide lists batteries from 15 mAh at size 6 to 22 mAh at size 13 for Oura rings in general.
Water
Oura’s general FAQ allows showering, swimming, recreational diving and snorkeling to 100 meters, rules out scuba, and says not to leave a ring underwater for more than 12 hours. That guidance is written for Oura’s current rings; Gen3 has no water rating of its own.
Price
Oura doesn’t sell Gen3 anymore, so there’s no official price to measure a used one against. If you keep yours, budget $5.99 a month for Oura Membership in the US, unless your account still has a Lifetime Membership.
Sources
- Amazon product listing — accessed 2026-09-20
- Oura Member Care — Previous Oura Ring Generations — accessed 2026-09-19
- Oura Member Care — General FAQs — accessed 2026-09-19
- Oura Member Care — Product Safety & Use — accessed 2026-09-19
- Oura Member Care — Oura Membership — accessed 2026-09-19
- Oura Member Care — Device Firmware Versions — accessed 2026-09-19
- Oura store — accessed 2026-09-19
Frequently asked questions
Can I still buy Oura Ring Gen3 from Oura?
No. Oura says the Gen3 ring and its charger are no longer available, and its US store listed only Ring 5, Ring 4 and Ring 4 Ceramic on 19 September 2026.
Does Gen3 need Oura Membership?
Yes, unless your account kept a legacy Lifetime Membership. In the US the membership is $69.99 a year or $5.99 a month, after a free first month for new members; without it, the app is down to the three daily scores plus battery, profile, settings and Explore.
What's the difference between Horizon and Heritage?
How you wear them. Horizon goes on with the dimple toward your palm, the same cue Ring 4 and Ring 5 use; Heritage sits with its flat side on top of your finger. Oura lists the same sensors and software for both.
Does Gen3 still get updates?
Yes. Firmware 3.4.3 arrived on 20 April 2026 with internal optimizations and bug fixes, and it was the latest Gen3 build in Oura's firmware list, last updated 17 June 2026.
Official product page: Oura Ring Gen3. Specs: Oura Ring Gen3 specs.