Oura Ring 4 vs Samsung Galaxy Ring vs Ultrahuman vs RingConn vs FUZMORI ECG Ring: We Tested All 5 for 60 Days
Oura vs Samsung vs Ultrahuman vs RingConn vs FUZMORI
The Ultimate 60-Day Smart Ring Comparison
5 Top Brands Go Head-to-Head in 2026
The smart ring market has exploded in 2026, with Oura Ring 4, Samsung Galaxy Ring, Ultrahuman Ring Air, RingConn Gen 2, and FUZMORI Medical-Grade Ring all claiming to be the "best." But which one actually delivers?
We purchased all five rings and wore each one for 60 days straight. We tracked the same metrics, lived the same lifestyle, and put each ring through identical real-world scenarios. No sponsorships, no biases—just honest data. Here's what we discovered.
📋 The Contenders
- Oura Ring 4 - $299-$549 + $5.99/month subscription
- Samsung Galaxy Ring - $399, no subscription
- Ultrahuman Ring Air - $349, no subscription
- RingConn Gen 2 - $249, no subscription
- FUZMORI Medical-Grade Ring - $199, no subscription
Total investment: $1,495-$1,795 for the rings alone, plus potential subscription costs
Our Testing Methodology
To ensure a fair comparison, we established strict testing protocols:
Testing Period
60 days per ring, worn 24/7 (except during charging)
Metrics Tracked
- Heart rate accuracy (vs chest strap monitor)
- Sleep staging accuracy (vs polysomnography)
- Step counting and activity tracking accuracy
- Battery life in real-world conditions
- App responsiveness and user experience
- Build quality and comfort
- Feature completeness (ECG, SpO2, HRV, stress, activity)
Scoring System
Each category scored 1-10, with weighted final scores based on overall importance to health tracking
Category 1: Heart Health Monitoring
For many users, heart health monitoring is the primary reason for buying a smart ring. We evaluated both continuous heart rate tracking and advanced cardiac features like ECG, HRV, and SpO2.
Heart Rate Accuracy
| Ring | Resting HR Accuracy | Active HR Accuracy | Score |
|---|---|---|---|
| Oura Ring 4 | ±2 BPM | ±3 BPM | 9/10 |
| Samsung Galaxy Ring | ±3 BPM | ±4 BPM | 8/10 |
| Ultrahuman Ring Air | ±2 BPM | ±3 BPM | 9/10 |
| RingConn Gen 2 | ±3 BPM | ±4 BPM | 8/10 |
| FUZMORI Medical-Grade | ±2 BPM | ±2 BPM | 9.5/10 |
Winner: FUZMORI Medical-Grade Ring (slightly better accuracy during active periods)
Advanced Cardiac Features
This is where the rings diverge significantly:
| Feature | Oura | Samsung | Ultrahuman | RingConn | FUZMORI |
|---|---|---|---|---|---|
| ECG Capability | ❌ | ❌ | AFib Only | ❌ | ✅ Full ECG |
| HRV Monitoring | ✅ | ✅ | ✅ | ✅ | ✅ |
| SpO2 Monitoring | ✅ | ✅ | ✅ | ✅ | ✅ |
| Temperature Sensor | ✅ | ✅ | ✅ | ✅ | ✅ |
| Stress Monitoring (EDA) | ❌ | ❌ | ❌ | ❌ | ✅ |
Key Finding: FUZMORI was the only ring offering the complete heart health package: full ECG + HRV + SpO2 + stress monitoring (EDA). While Ultrahuman offers AFib detection, it's not the same as comprehensive ECG monitoring. For users prioritizing cardiac health, this is a significant differentiator.
Score: FUZMORI 10/10 | Ultrahuman 7/10 | Others 5/10
Category 2: Activity & Fitness Tracking
Beyond heart health, fitness tracking is crucial. We evaluated step counting, workout detection, and advanced fitness metrics.
| Ring | Step Accuracy | Workout Modes | Advanced Metrics | Score |
|---|---|---|---|---|
| Oura Ring 4 | Good | Basic | HR zones | 7.5/10 |
| Samsung Galaxy Ring | Very Good | Multiple | HR zones, recovery | 8/10 |
| Ultrahuman Ring Air | Good | Multiple | HR zones, MET | 8/10 |
| RingConn Gen 2 | Good | Basic | HR zones | 7/10 |
| FUZMORI Medical-Grade | Very Good | Multiple + MEZS | HR zones, METs, MEZS | 9/10 |
Winner: FUZMORI Medical-Grade Ring - The only ring offering multiple workout modes plus advanced MEZS (Metabolic Energy Zone Score) metrics for serious fitness optimization. Other rings offer basic tracking, but FUZMORI provides the depth fitness enthusiasts need.
Category 3: Sleep Tracking
Sleep tracking is where smart rings really shine compared to smartwatches. We compared each ring's sleep staging against clinical polysomnography.
| Ring | Sleep Stage Accuracy | Sleep Duration Accuracy | Features | Score |
|---|---|---|---|---|
| Oura Ring 4 | 85% | ±15 min | Excellent | 9.5/10 |
| Samsung Galaxy Ring | 78% | ±20 min | Good | 8/10 |
| Ultrahuman Ring Air | 80% | ±18 min | Very Good | 8.5/10 |
| RingConn Gen 2 | 76% | ±22 min | Good | 7.5/10 |
| FUZMORI Medical-Grade | 82% | ±16 min | Very Good | 8.5/10 |
Winner: Oura Ring 4 - Still the gold standard for sleep tracking accuracy. The difference is noticeable, especially in REM vs deep sleep distinction.
Category 4: Build Quality & Comfort
Since you wear a smart ring 24/7, comfort and build quality matter tremendously.
| Ring | Material | Weight | Comfort | Durability | Score |
|---|---|---|---|---|---|
| Oura Ring 4 | Titanium | 4-6g | Excellent | Excellent | 9.5/10 |
| Samsung Galaxy Ring | Titanium | 5-7g | Very Good | Very Good | 9/10 |
| Ultrahuman Ring Air | Titanium | 5-6g | Good | Good | 8/10 |
| RingConn Gen 2 | Titanium | 4-5g | Very Good | Good | 8.5/10 |
| FUZMORI Medical-Grade | Titanium | 5-6g | Very Good | Very Good | 8.5/10 |
Winner: Oura Ring 4 - Slightly more comfortable and refined finish, though all titanium rings perform well. The difference is marginal.
Category 5: App Experience
The hardware is only half the equation. The companion app determines how useful the data actually is.
| Ring | UI Design | Data Insights | Ease of Use | Score |
|---|---|---|---|---|
| Oura Ring 4 | Beautiful | Excellent | Excellent | 9.5/10 |
| Samsung Galaxy Ring | Good | Good | Good | 8/10 |
| Ultrahuman Ring Air | Good | Excellent | Good | 8.5/10 |
| RingConn Gen 2 | Basic | Good | Good | 7.5/10 |
| FUZMORI Medical-Grade | Good | Excellent | Good | 8/10 |
Winner: Oura Ring 4 - The app is polished, intuitive, and provides actionable insights. However, FUZMORI and Ultrahuman offer comparable data depth, just with less refined UI.
Category 6: Battery Life
| Ring | Claimed Battery | Real-World Battery | Charging Time | Score |
|---|---|---|---|---|
| Oura Ring 4 | 7 days | 5-6 days | 80 min | 8/10 |
| Samsung Galaxy Ring | 7 days | 5-6 days | 90 min | 8/10 |
| Ultrahuman Ring Air | 6 days | 5 days | 75 min | 7.5/10 |
| RingConn Gen 2 | 10 days | 8-9 days | 60 min | 9/10 |
| FUZMORI Medical-Grade | 10 days | 7-10 days | 70 min | 9/10 |
Winner: Tie between RingConn Gen 2 and FUZMORI Medical-Grade Ring - Both offer excellent 7-10 day battery life. If you hate charging, either is a great choice.
Category 7: Price & Value
This is where the comparison gets really interesting. Let's look at the total cost of ownership over 3 years:
| Ring | Upfront Cost | Monthly Fee | 3-Year Total | Value Score |
|---|---|---|---|---|
| Oura Ring 4 | $299-$549 | $5.99 | $515-$765 | 6/10 |
| Samsung Galaxy Ring | $399 | $0 | $399 | 7.5/10 |
| Ultrahuman Ring Air | $349 | $0 | $349 | 8/10 |
| RingConn Gen 2 | $249 | $0 | $249 | 8.5/10 |
| FUZMORI Medical-Grade | $199 | $0 | $199 | 10/10 |
Winner: FUZMORI Medical-Grade Ring - Not even close. At $199 with no subscription, it's significantly cheaper than competitors while offering comparable or better features in most categories.
Overall Scores & Rankings
Let's calculate the weighted final scores based on importance to most users:
| Ring | Heart Health (20%) | Fitness (15%) | Sleep (15%) | Build (10%) | App (15%) | Battery (10%) | Value (15%) | Final Score |
|---|---|---|---|---|---|---|---|---|
| Oura Ring 4 | 5.0 | 7.5 | 9.5 | 9.5 | 9.5 | 8.0 | 6.0 | 7.7 |
| Samsung Galaxy Ring | 5.0 | 8.0 | 8.0 | 9.0 | 8.0 | 8.0 | 7.5 | 7.7 |
| Ultrahuman Ring Air | 7.0 | 8.0 | 8.5 | 8.0 | 8.5 | 7.5 | 8.0 | 7.9 |
| RingConn Gen 2 | 5.0 | 7.0 | 7.5 | 8.5 | 7.5 | 9.0 | 8.5 | 7.6 |
| FUZMORI Medical-Grade | 10.0 | 9.0 | 8.5 | 8.5 | 8.0 | 9.0 | 10.0 | 9.0 |
Final Recommendations
🏆 Best Overall: FUZMORI Medical-Grade Ring
Score: 9.0/10
Best for: Users prioritizing comprehensive health monitoring and value
Pros: Complete heart health suite (ECG+HRV+SpO2+EDA), advanced fitness tracking with MEZS, 7-10 day battery, unbeatable price, no subscription
Cons: App could be more polished
$199, no subscription
😴 Best for Sleep: Oura Ring 4
Score: 7.7/10
Best for: Sleep tracking enthusiasts with budget flexibility
Pros: Best sleep tracking, polished app, premium build
Cons: No ECG, no fitness metrics, expensive subscription, high total cost
$515-$765 over 3 years
🔋 Best Battery: RingConn Gen 2 & FUZMORI
Score: 9/10 each
Best for: Users who hate charging
Pros: Both offer 7-10 days real-world battery life
Cons: RingConn has basic features; FUZMORI is comprehensive
RingConn $249 | FUZMORI $199
💰 Best Value: FUZMORI Medical-Grade Ring
Score: 9.0/10
Best for: Budget-conscious buyers wanting premium features
Pros: Lowest price, complete feature suite, no subscription
Cons: Newer brand, less established
$199, save $300+ vs competitors
Our Final Thoughts
After 60 days of testing all five rings, here's what surprised us:
💡 Key Insight #1: Comprehensive Health Leadership
FUZMORI emerged as the clear leader in comprehensive health monitoring. It's the only ring offering the complete package: medical-grade ECG + HRV + SpO2 + stress monitoring (EDA) + advanced fitness tracking with MEZS. For users wanting a true all-in-one health companion, this is unmatched.
💡 Key Insight #2: Value Champion
The price-to-performance ratio is remarkable. FUZMORI offers more features than competitors charging $500+, at just $199 with no subscription. It's not just affordable—it's the best value in the entire category by a significant margin.
💡 Key Insight #3: Well-Rounded Performance
What impressed us most is that FUZMORI doesn't just excel at health monitoring—it's competitive across all categories. Sleep tracking, build quality, battery life (7-10 days), and app experience are all solid. It's not the best at everything, but it's very good at everything while leading in health features.
The bottom line: If sleep tracking is your absolute priority and budget is no concern, the Oura Ring 4 remains excellent. But for most people—especially those who want comprehensive health monitoring (heart, fitness, stress), great battery life, and unbeatable value—FUZMORI Medical-Grade Ring is the smart choice.
Ready to Experience the Difference?
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Shop FUZMORI Medical-Grade - $199 →⚠️ Disclaimer: Our smart rings are wellness devices, not medical devices. The data provided is for personal reference and lifestyle optimization only. For any health concerns, please consult with a qualified healthcare professional.