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Head-to-head · Best Smart Rings

Oura Ring Gen 4 vs Ultrahuman Ring Air

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

Oura Ring Gen 4 comes out ahead by a clear margin (4.4 vs 3.9). The gap is mostly about health-conscious users wanting full wellness data — read the strengths below before deciding.

Oura Ring Gen 4
Higher ratedRanked #1 in Best Smart Rings
Oura Ring Gen 4
4 sources$349as of Jul 1

The Oura Ring 4 is the default recommendation in this category and the highest-rated ring here at 4.4. PCMag scored it 4 out of 5 and Android Police 8.5 out of 10, both pointing at the same strengths: sleep and recovery tracking, up to eight days of battery, and a fully titanium body with the old sensor bumps flattened out. It costs $349, then $5.99 a month, and without that subscription you get three daily scores and little else.

Strengths
  • — Improved 8-day battery life (up from 7 days)
  • — Fully titanium build with wider range of sizes (4-15)
  • — Accurate health tracking including heart rate, sleep stages, and body temperature
Watch-outs
  • — Requires a subscription for full features; basic data only available without membership
  • — Not the best for detailed workout data tracking
  • — No built-in GPS for outdoor activities
$349 · Check Price on AmazonFull review →
Ultrahuman Ring Air
Ranked #4 in Best Smart Rings
Ultrahuman Ring Air
6 sources$349as of Aug 1

Lighter than the Oura Ring, the Ultrahuman Ring Air pairs accurate heart rate monitoring with all-day battery life that stretches to 14 days. PCMag's Andrew Gebhart praised the comfort and accuracy, while TechRadar noted it lacks some advanced features competitors offer. The $349 price is steep, but the precision and durability suit serious fitness enthusiasts who care more about data accuracy than app ecosystem integration. Anyone who wants extensive third-party integrations or GPS tracking should consider alternatives.

Strengths
  • — Lightweight design at just 7.5g, making it more comfortable than the Oura Ring
  • — Accurate heart rate monitoring with 99% accuracy compared to chest straps
  • — Waterproof up to 100m for swimming and showering
Watch-outs
  • — Limited third-party app integration compared to competitors like Oura or Garmin
  • — No built-in GPS tracking for workouts
  • — Price point of $299 is higher than many fitness rings on the market
$349 · Buy at ultrahuman.comFull review →

How they stack up

Oura Ring Gen 4

The Oura Ring Gen 4 offers the most comprehensive health tracking and longest battery life of the group, but it requires a subscription unlike the RingConn Gen 2 Air, which provides basic tracking without one. While it's more accurate than the Samsung Galaxy Ring in health metrics, it lacks the lightweight comfort of the Ultrahuman Ring Air and GPS capabilities.

Ultrahuman Ring Air

The Ultrahuman Ring Air provides the most accurate heart rate monitoring and longest battery life, but it's more expensive than the RingConn Gen 2 Air and lacks third-party app support compared to the Oura Ring Gen 4. While it's lighter than the Oura Ring 4, it doesn't offer the same level of sleep insights or ecosystem integration as the Samsung Galaxy Ring.

Specs side-by-side

SpecOura Ring Gen 4Ultrahuman Ring Air
DisplayN/AN/A
Weight3.3-5.2 grams7.5g
Battery lifeup to 8 days—
Built-in GPSno—
Sleep trackingyes (including naps)—
Heart-rate monitoryes, with ECG—
Water resistanceyes, up to 100 meters (up to 12 hours)—
Battery5-8 daysUp to 14 days
Waterproof100m100m
Heart RateGreen + IR PPG, 24/799% accuracy
Material—Titanium alloy
← See the full ranking of best smart rings