Samsung Galaxy Ring vs Oura Ring: Data, Specs, and Cost Comparison

Two Rings, Two Approaches

This comparison is built from published validation studies, manufacturer specifications, and aggregated user reports. No first-person testing was conducted.

The Samsung Galaxy Ring and Oura Ring Gen 3 are the two main smart ring options for sleep tracking. Both use titanium construction, both lack displays, and both fit into a ring form factor that weighs under 6 grams. The differences come down to accuracy validation, sensor coverage, subscription models, and platform compatibility.

Sleep Tracking Accuracy

Oura Ring Gen 3

Published research shows approximately 79% four-stage agreement with polysomnography (Altini & Kinnunen, 2021Cited studyThe Promise of Sleep: A Multi-Sensor Approach for Accurate Sleep Stage Detection Using the Oura RingAltini M & Kinnunen H · Sensors · 2021The largest published Oura Ring sleep stage validation against polysomnography. The 79% four-stage agreement figure is the most-cited single accuracy number for any consumer sleep tracker and is the editorial baseline for CircaTest's Oura coverage. Authors are Oura Health employees, which is disclosed in the paper.View full record →, Sensors). This is independent peer-reviewed data based on 440 nights from 106 individuals.

The Oura Ring provides a sleep score, detects light, deep, REM sleep, and naps. However, detailed sleep staging data requires the $5.99/month subscription. The free tier provides basic duration and timing only.

Samsung Galaxy Ring

No published validation data exists for the Samsung Galaxy Ring. There is no peer-reviewed PSG comparison study, and Samsung has not released independently verifiable staging accuracy figures. Any number you see quoted for Galaxy Ring accuracy should be treated with caution until independent validation is published.

The Samsung Galaxy Ring provides a sleep score, detects all sleep stages, and naps. All sleep staging data is free with no subscription.

Accuracy Assessment

The Oura Ring has peer-reviewed data (79% four-stage agreement with PSG). The Samsung Galaxy Ring has no published validation at all. The two devices therefore cannot be directly compared on accuracy. Buyers who prioritize measurable, independently validated sleep staging currently have only Oura on the ring side.

Sensor Comparison

Both rings use finger-based PPG measurement, which benefits from stronger arterial signal and lower motion artifact compared to wrist placement (Kinnunen et al., 2020Cited studyFeasible assessment of recovery and cardiovascular health: accuracy of nocturnal HR and HRV assessed via ring PPG in comparison to medical grade ECGKinnunen H et al. · Physiological Measurement · 2020Establishes Oura ring PPG validity for nocturnal heart rate and HRV against medical ECG: nightly average HR agreement r² = 0.996 (mean bias -0.63 bpm), nightly average HRV agreement r² = 0.980 (mean bias -1.2 ms), in 49 adults aged 15-72. CircaTest cites this study to support claims about ring-form-factor PPG signal quality during sleep. Important honesty caveat: this study does NOT directly compare wrist-vs-finger PPG placement; the CircaTest article body claim that this paper documented a placement advantage is overstated and was softened during the retrofit. The paper establishes ring PPG accuracy against ECG, which is the underlying point but not the placement comparison the article body originally implied.View full record →).

The key hardware difference: the Oura Ring includes an SpO2 sensor for blood oxygen measurement. The Samsung Galaxy Ring does not. This means the Samsung ring cannot monitor overnight blood oxygen levels, which removes a data stream relevant to respiratory health tracking.

Health Features

Oura Ring Gen 3

HRV, resting heart rate, respiratory rate, blood oxygen, body temperature, menstrual cycle tracking, stress tracking, and a readiness score.

Samsung Galaxy Ring

HRV, resting heart rate, body temperature, menstrual cycle tracking, and a readiness score.

The Samsung ring does not track respiratory rate, blood oxygen, or stress levels. Both rings lack FDA clearance for medical screening.

Hardware Comparison

The hardware profiles are remarkably similar. The Samsung Galaxy Ring is 2 grams lighter (3g vs 5g). Battery life, charge time, water resistance, and material are identical.

Cost Comparison

The Samsung Galaxy Ring costs $100 more upfront but has no ongoing fees. Over two years with the Oura subscription, the Oura Ring becomes $43.76 more expensive ($442.76 vs $399).

Without the subscription, the Oura Ring is $100 cheaper, but sleep staging data is locked behind the paywall. The Samsung Galaxy Ring includes all sleep staging data for free.

Pricing verified as of March 31, 2026.

Platform Compatibility

The Samsung Galaxy Ring is Android only. iPhone users cannot use it. The Oura Ring works with both platforms and integrates with all major health ecosystems. This is the single largest compatibility difference between the two rings.

Limitations

Oura Ring Gen 3:

• Sleep staging locked behind $5.99/month subscription
• Higher 2-year cost with subscription ($442.76 vs $399)
• No FDA clearance
• Heavier (5g vs 3g, though both are minimal)

Samsung Galaxy Ring:

• No published validation data exists (no peer-reviewed PSG comparison)
• No SpO2 sensor (no blood oxygen monitoring)
• No respiratory rate tracking
• Android only, no iOS support
• No Strava integration
• No stress tracking
• Limited third-party ecosystem integration

Who the Data Suggests Each Ring Fits

The data profile favors the Oura Ring if:

• Sleep tracking accuracy is the highest priority, based on peer-reviewed validation
• You want SpO2 and respiratory rate monitoring during sleep
• You use an iPhone, or want cross-platform flexibility
• You value broad ecosystem integration (Apple Health, Google Fit, Strava)
• You want stress tracking and the most comprehensive health feature set

The data profile favors the Samsung Galaxy Ring if:

• You are an Android user (specifically Samsung Galaxy phone owner)
• You prefer a one-time purchase with no subscription fees
• Free access to full sleep staging data is a priority
• You want the lightest possible ring (3g)
• SpO2 and respiratory rate monitoring are not priorities