Comparison · Fitness rings · Desk research
Oura Ring 4 vs Oura Ring Gen3
Side-by-side manufacturer cells from the two named ring pages. Not a lab test. Brand grouping uses the published brand field (Oura).
Quick Answer
Oura Ring 4 vs Oura Ring Gen3 is a desk comparison of OEM cells (verified 2026-09-19 / 2026-09-19). Oura Ring 4: From $349 US (Silver/Stealth) on ouraring.com/store, 2026-09-19; Gold listed $399–$499. Oura Ring Gen3: Not sold on ouraring.com/store (accessed 2026-09-19). Do not invent a leftover street ticket.. Battery: Typically 5–8 days vs A fully charged Gen3 may last up to seven days (General FAQs / Ring Battery Tip…. Not a lab test.
The verdict
Oura Ring 4 for new buyers on this Oura line; Oura Ring Gen3 if the leftover size, finish, or dated ticket is the fit
Why: Same brand (Oura). Oura Ring 4 ranks newer/current on this line. Cells are OEM quotes dated 2026-09-19 / 2026-09-19 — not a lab winner for comfort, accuracy, or real-world battery.
Buy Oura Ring 4 if
Buyers who need sizes 4–5 or 14–15, which Ring 5 does not sell.
Buy Oura Ring Gen3 if
Owners who already have Horizon or Heritage and want an OEM-cited spec sheet.
Specs side by side
Same rows as the two named ring pages. Values are copied from those pages — if a cell is unpublished or contradictory on the manufacturer page, it already says so.
| Attribute | Oura Ring 4 | Oura Ring Gen3 |
|---|---|---|
| Materials | Titanium exterior and interior with PVD or DLC depending on finish; non-allergenic BPA-free titanium inner shellOura Ring 4 support | Titanium with PVD (Gold, Silver, Rose Gold, Brushed Titanium) or DLC (Black, Stealth); non-allergenic, non-metallic seamless inner molding, BPA-freePrevious Oura Ring Generations (updated 2026-05-13) |
| Width | 7.9 mmOura Ring 4 support compare table | Not publishedsupport.ouraring.com Previous Generations |
| Thickness | ~2.88 mm; recessed sensor dome 0.3 mmOura Ring 4 support | Not publishedsupport.ouraring.com Previous Generations |
| Weight | 3.3–5.2 g depending on size (titanium SKU)Oura Ring 4 support | Not publishedsupport.ouraring.com Previous Generations |
| Sizes | 4–15 (Ring 4 sizing kit)Oura Ring 4 support | No standalone Gen3 size table on Previous Generations. Product Safety lists a 15 mAh (US6) – 22 mAh (US13) Lipo battery for “Oura Ring” — do not treat that as a complete retail size run.Previous Generations; Product Safety 2026-06-19 |
| Finishes | Store still listed Gold, Silver, Stealth on 2026-09-19; confirm live inventoryouraring.com/store | Horizon and Heritage models in Black, Brushed Titanium, Gold, Rose Gold, Silver, or Stealth (matte black)Previous Oura Ring Generations |
| Battery (OEM) | Typically 5–8 daysOura Ring 4 supportOura: varies by size, settings, activity, battery age. | A fully charged Gen3 may last up to seven days (General FAQs / Ring Battery Tips)General FAQs 2026-09-18; Ring Battery TipsOura: varies by size, settings, activity, battery age. |
| Charging (OEM) | Typically 20–80 minutes depending on starting chargeOura Ring 4 support | General FAQs charge window for “your Oura Ring” is 20–80 minutes. Gen3 charger: align sensor bumps opposite the charger light.General FAQs; Use Your Oura Ring Charger context |
| Charging case (OEM) | Size-specific charging dock + USB cable in the box (General FAQs). Not a Ring 5 travel case.Oura General FAQs 2026-09-18; Use Your Oura Ring Charger | Not publishedPrevious Generations; General FAQs 2026-09-18 |
| Water resistance | 100 m / 328 ft. Ring 4 support: sauna and water sports, not diving. General FAQs / Product Safety (updated 2026-09-18): showering, swimming, recreational diving/snorkeling OK; not scuba; do not keep submerged over 12 hours.Oura Ring 4 support; General FAQs 2026-09-18; Product SafetyCite the page. Do not flatten “not diving” over the General FAQs recreational-diving sentence. | General FAQs / Product Safety (current rings): 100 m; showering, swimming, recreational diving/snorkeling OK; not scuba; do not keep submerged over 12 hours. Previous Generations does not restate a Gen3-only water row.General FAQs 2026-09-18; Product Safety |
| Sensors | Smart Sensing; 3 photodetectors + 2 triple LEDs (red, green, IR); digital temperature; accelerometerOura Ring 4 support | Green + red + IR LEDs (daytime and activity HR); extra NTC temperature sensor; extra IR alignment sensor; accelerometersPrevious Oura Ring Generations |
| Sleep tracking | Detailed sleep analysis with membership; nighttime SpO2 via red + IROura Ring 4 support | Detailed sleep analysis with membership; Blood Oxygen Sensing (SpO2) listed on the Gen3 software listPrevious Generations; Membership support |
| Activity / fitness | 24/7 HR; Automatic Activity Detection; dynamic activity goals (membership)Oura Ring 4 support | 24/7 HR (daytime, nighttime, activity); Automatic Activity Detection; dynamic activity goals (membership)Previous Generations |
| App | Oura AppOura Ring 4 support | Oura AppPrevious Generations; Set up the Oura App |
| Subscription / data access | Oura Membership (US $5.99/mo or $69.99/year; 1 complimentary month for new members). Same account rules as Ring 5.Oura Membership support; Ring 4 support | Oura Membership applies to Gen3 and newer (US $5.99/mo or $69.99/year; 1 complimentary month for new members). Some Gen3 accounts still show a legacy Lifetime Membership promo.Oura Membership support 2026-09-08 |
| Phone platforms | iOS 16+ or Android 11+ with Google Play; Bluetooth 5.0 phoneOura Set up the Oura App / General FAQs | iOS 16+ or Android 11+ with Google Play; Bluetooth 5.0 phoneOura General FAQs / Product Safety |
| Wireless | Bluetooth Low Energy (Bluetooth Smart); EMF-safe; Airplane Mode; FCC certifiedOura Ring 4 support | Bluetooth (app pairing). Exact radio version not restated on Previous Generations (accessed 2026-09-19)Previous Generations; General FAQs |
| On-ring storage | Up to one week (seven days)Oura Ring 5 support compare table (Ring 4 column) | Up to one week (seven days)Oura Product Safety & Use 2026-06-19 |
| US price (dated) | From $349 (Silver/Stealth) on ouraring.com/store, 2026-09-19ouraring.com/store | Not listed on ouraring.com/store, 2026-09-19. Official: no longer for purchase.Previous Generations; Oura store |
| Price band | Leftover flagship membership ringDerived from dated US store | Discontinued membership ringDerived from Previous Generations + empty store listing |
| Announced | Previous current generation; support last updated 18 June 2026Oura Ring 4 support | Previous generation; Previous Generations article last updated 13 May 2026support.ouraring.com/hc/en-us/articles/360025570153 |
| Availability | Still listed on the Oura store 2026-09-19; Oura says check store or authorized retailer for inventoryOura Ring 4 support; store | Discontinued. Gen3 ring and charger no longer for purchase (Oura, 13 May 2026 article, re-opened 2026-09-19).Previous Oura Ring Generations |
Oura Ring 4 hub notes
- Widest current Oura size run: 4–15.
- Smart Sensing + recessed sensors; up to 7 days of onboard memory (vs 3 on Ring 5).
- Same membership feature list as Ring 5.
Ring 4 is the leftover Oura with the wide size run (4–15), 7.9 × ~2.88 mm titanium, typically 5–8 days, and the same paid membership app as Ring 5. Buy it for extreme sizes or leftover price. Skip it if you fit 6–13 and want the smaller Ring 5, or if you will not pay membership.
Oura Ring Gen3 hub notes
- First Oura with daytime / activity HR (green + red + IR) and Cycle Insights NTC.
- Horizon (palm dimple) vs Heritage (flat on top) — wear orientation differs.
- Firmware still rolling in 2026 (3.4.3, 20 April 2026).
Gen3 is the last discontinued Oura that still takes membership software and firmware 3.4.3 (20 April 2026). Buy leftover only if you already own one. Skip a new purchase — Oura no longer sells the ring or its charger.
Sources
Union of the two hub source lists. Re-open the OEM URL, not this comparison, to refresh a cell.
- Oura Member Care — Oura Ring 4 — accessed 2026-09-19
- Oura store — accessed 2026-09-19
- Oura Member Care — Discover Oura Ring 5 (Ring 4 compare column) — accessed 2026-09-19
- Oura Member Care — Oura Membership — 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 — Device Firmware Versions — accessed 2026-09-19
- Oura Member Care — Previous Oura Ring Generations — accessed 2026-09-19
Hub A: Oura Ring 4. Hub B: Oura Ring Gen3.