SIDE BY SIDE
See prices, running costs, specifications and trade-offs side by side. Choose two to four products of the same type.
Smart ring
Matte Black finish, sizes 6 to 15 (or 'Don't know my size' with the free Gen 3 sizing kit), charging case included
$349US price, checkedSubscription-free sleep and recovery ring with up to 14 days of battery
Check price at RingConn for RingConn Gen 3 Full review →
Our no-membership ring pick
Aster Black finish, whole sizes 5 to 14, with PRO Charging Case
$479US price, checkedSubscription-free titanium ring with its charging case included
Check price at Ultrahuman for Ultrahuman Ring PRO Full review →| Criterion | RingConn Gen 3 | Ultrahuman Ring PRO |
|---|---|---|
| US price | $349Checked Oct 13, 2026 · Price details in the review | $479Checked Oct 13, 2026 · Price details in the review |
| Three-year ownership estimate | $349 Incomplete known subtotal. Not included: energy use. | $479 Incomplete known subtotal. Not included: energy use. |
| Choose if | You wear a size 6 to 15, want overnight sleep, HRV and temperature trends from a ring, and would rather pay $349 once than pay a yearly membership. | Anyone in a whole ring size from 5 to 14 who wants long battery life and would rather pay $479 once than pay a yearly membership. |
| Main trade-off | The page gives no accuracy data for the vascular and sleep apnea insights, returns within 14 days need a valid reason such as a defect or wrong color, and the 1-year US warranty excludes battery replacement. | Ultrahuman publishes no Ring PRO accuracy figures on the pages checked, some features are paid PowerPlugs, and theft and loss cover needs the $54 two-year UltrahumanX plan. |
| Key specifications |
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| Exact variant | Matte Black finish, sizes 6 to 15 (or 'Don't know my size' with the free Gen 3 sizing kit), charging case included | Aster Black finish, whole sizes 5 to 14, with PRO Charging Case |
| Dimensions | 2.3 mm thick, weighing 2.5 to 3.5 g. RingConn's product page doesn't state the band width or the inner diameter of each size. | It's 2.65 mm thick, though thickness varies by size. It weighs 3.3 to 4.8 g depending on size. Ultrahuman doesn't state band width or per-size inner diameter on the pages checked. |
| Installation | No installation. If you don't know your Gen 3 size, choose the free sizing kit option ('Don't know my size') when you order. RingConn says it sends the kit before the ring ships, and that the kit arrives in 3 to 8 days, depending on location. You then submit your size under 'My Orders'. The ring pairs with your RingConn App account over Bluetooth 5.0, on iOS 17.0 or later or Android 10.0 or later. RingConn lists the box contents as the Gen 3 ring, a charging case, a USB-C charging cable and a quick start guide. | No installation. It pairs over Bluetooth (BLE 5.3) with the Ultrahuman app, which is on the App Store and Google Play. In the box are the ring, the Ring PRO Charger and a 1 m USB-C to USB-C cable. Ring PRO charges only on the PRO Charger or PRO Charging Case, not on a Ring AIR charger. Before you order, Ultrahuman offers a free sizing kit with plastic sizers in sizes 5 to 14. |
| Materials | Titanium alloy, with medical-grade epoxy and a PVD coating. RingConn's FAQ describes the matte finish as non-reflective and understated. | The ring is titanium with a PVD coating, plus epoxy and polycarbonate. Ultrahuman says the inner surface is hypoallergenic plastic and titanium. The charging case is aluminum, stainless steel and plastic. |
| Warranty | The warranty runs 1 year from delivery in the US and everywhere else outside the EEA. EEA countries get 2 years. RingConn's Return & Refund Policy says it will repair, replace or refund if a defect in its workmanship causes damage, with proof of purchase. It excludes improper or negligent use, maintenance contrary to instructions, normal wear and tear and accidental damage. The policy calls rechargeable batteries consumables with a limited lifespan, and the standard warranty doesn't include battery replacement. It doesn't say whether cosmetic damage or loss is covered. | A 12-month limited warranty runs from delivery and covers defects in materials and workmanship. It's valid only in the country of purchase. The Terms of Sale, which don't name Ring PRO, exclude consumable parts such as batteries or protective coatings unless a defect caused the failure. They also exclude accidents, misuse and normal wear and tear. Cosmetic damage such as scratches and dents isn't covered unless a defect caused it. Upgrading through trade-in resets the warranty. Optional UltrahumanX coverage costs $36 for 1 year, with accidental damage protection and priority care. The $54 plan for 2 years adds theft and loss protection and what Ultrahuman calls weight loss insurance. |
| Returns | The product page advertises '14-Day Returns & Exchanges', with conditions applying and sizing kits excluded. The fine print is in RingConn's Return & Refund Policy. You have to request a return within 14 calendar days of delivery. Returns and exchanges both need a valid reason. The policy lists a defect or damage on delivery, a color different from the one you ordered, or a product that differs significantly from its description. The returned ring must also be in its original condition and, in the policy's words, one that 'has not been opened and used'. You pay return shipping, and shipping, handling and tax aren't refunded. The exceptions are a return for a defect, damage or non-conformity you documented with photos in advance, or one caused by RingConn's error. No restocking fee is stated, but RingConn may deduct for damage, wear or missing parts. Sizing kits are non-refundable and non-returnable. Canceling after a kit has shipped costs $10. For a different size or color, the policy recommends a return request and a new order. | If you're not completely satisfied, you can return it within 30 days of delivery. Send it back in the original packaging with all original accessories, including the charger. The Ring PRO FAQ and the Smart Rings Terms of Sale both say return shipping is free. No restocking fee is stated. The Terms of Sale list these return terms under the Ring AIR heading, and the FAQ applies them to Ring PRO. |
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These comparisons use published specifications, not head-to-head tests. Prices and terms are dated. Unknown costs are not zero. Check the exact variant before you buy.