Best Smart Rings

Smart rings are the next frontier in wearable technology—combining sleek, discreet design with powerful sensors to monitor your sleep, recovery, and daily activity without the bulk of a watch. Whether you’re optimizing workouts, improving sleep quality, or simply staying connected with subtle notifications, the Best Smart Rings offer a blend of fashion and function right at your fingertips—literally.

In this guide, we’ll reveal the top four smart rings on the market, dive into detailed reviews, and walk you through the most critical features you need to consider. By splitting our coverage into two detailed installments, you’ll get everything you need to find the ring that best aligns with your lifestyle, goals, and budget.

Why Invest in a Smart Ring?

  • Continuous Monitoring: Track heart rate, sleep stages, SpO₂, and body temperature 24/7.

  • Minimalist Design: Sleek form factor that fits any style—no bulky screens or straps.

  • Long Battery Life: Most smart rings last a week or more on a single charge.

  • Discrete Notifications: Gentle haptic alerts for calls, messages, and calendar reminders.

  • Advanced Insights: AI-driven analytics to help you optimize recovery, stress, and readiness.

Top 4 Best Smart Rings in 2025

Rank Model Sensors Battery Life Connectivity App Ecosystem
1 Oura Ring 4 PPG heart rate, SpO₂, temperature 7 days Bluetooth LE Oura App
2 Samsung Galaxy Ring PPG heart rate, ECG, temperature 5 days Bluetooth LE Samsung Health
3 RingConn Gen 2 Air PPG heart rate, SpO₂ 4 days Bluetooth LE RingConn App
4 Ultrahuman Ring Air PPG heart rate, temperature, motion 6 days Bluetooth LE Ultrahuman App

Detailed Reviews

1. Oura Ring 4

Overview:
The Oura Ring 4 elevates precision sleep and readiness tracking with its suite of advanced sensors and AI-driven insights. Housed in lightweight titanium, it offers exceptional durability and comfort for 24/7 wear.

Key Features:

  • Sensors: Infrared PPG for heart rate, SpO₂ monitoring, skin temperature sensor.

  • Battery: Up to 7 days on a single charge; USB-C fast charging.

  • Design: IP68 water- and dust-resistant; available in multiple finishes and sizes.

  • App & Insights: Comprehensive daily Readiness Score, detailed sleep staging, guided audio meditations, and activity goals.

  • Connectivity: Seamless Bluetooth LE sync; integrations with Apple Health, Google Fit, and Strava.

Pros & Cons:

Pros Cons
Industry-leading sleep analytics and readiness metrics Premium price point
Lightweight, low-profile design No AMOLED display for notifications
Extensive third-party app integrations Requires subscription for advanced insights
Robust build quality with multiple finish options Occasional Bluetooth sync delays reported

2. Samsung Galaxy Ring

Overview:
Samsung’s entry into the smart ring market brings ECG functionality to a compact form factor. The Galaxy Ring integrates tightly with the Samsung Health ecosystem and features on-device AI for personalized health guidance.

Key Features:

  • Sensors: PPG heart rate, single-lead ECG, skin temperature sensor.

  • Battery: Approximately 5 days; fast-charge support adds a day’s power in 15 minutes.

  • Design: Polished zirconia ceramic; swim-proof to 5 ATM.

  • App & Ecosystem: Deep integration with Samsung Health, Daily Wellness Score, guided breathing exercises, and fitness programs.

  • Connectivity: Bluetooth LE; syncs with Android and Wear OS devices.

Pros & Cons:

Pros Cons
On-demand ECG capability Limited iOS compatibility
Stylish ceramic finish Shorter battery life compared to competitors
Fast-charge feature Subscription required for some coaching plans
Native integration with Samsung ecosystem Fewer third-party app integrations

3. RingConn Gen 2 Air

Overview:
The RingConn Gen 2 Air refines its predecessor with a lighter build and improved sensor accuracy—all while maintaining a budget-friendly price point. It’s an excellent choice for those seeking core health metrics without premium subscription fees.

Key Features:

  • Sensors: Advanced PPG for continuous heart rate and SpO₂ monitoring.

  • Battery: Up to 4 days per charge; wireless charging pad included.

  • Design: Aerospace-grade aluminum shell; IP67 water- and dust-resistant.

  • App & Insights: Sleep staging, recovery score, stress tracking, and daily readiness insights—all free with no hidden paywalls.

  • Connectivity: Bluetooth LE sync; exports data to Apple Health and Google Fit.

Pros & Cons:

Pros Cons
No subscription required for core health metrics Shorter battery life than premium competitors
Lightweight and comfortable for 24/7 wear Smaller community and fewer third-party apps
Accurate SpO₂ readings Limited haptic notifications
Competitively priced App UI is less polished than top-tier rivals

4. Ultrahuman Ring Air

Overview:
Ultrahuman Ring Air focuses on metabolic health and real-time biometrics. Leveraging proprietary algorithms, it offers unique “Metabolism Score” insights and guided breathing sessions to help you optimize daily performance.

Key Features:

  • Sensors: PPG heart rate, skin temperature, 3-axis accelerometer for motion/activity detection.

  • Battery: Around 6 days; quick-charge delivers 1 day’s use in 10 minutes.

  • Design: Surgical-grade stainless steel; IP68 waterproof rating.

  • App & Insights: Metabolism Score, recovery insights, workout coaching cues, and “Mindful Minutes” guided breathwork.

  • Connectivity: Bluetooth LE; seamless sync with Ultrahuman mobile app and export to health platforms.

Pros & Cons:

Pros Cons
Unique metabolism and recovery analytics Subscription required for full feature access
Compact, lightweight design No SpO₂ sensor
Rapid charging Learning curve for interpreting proprietary scores
Robust build quality with premium finish Limited on-device haptics for notifications

Key Features to Consider

When selecting the best smart ring, focus on these essential criteria:

  1. Sensor Suite

    • Heart Rate Monitoring: Continuous vs. on-demand accuracy.

    • SpO₂ Tracking: Essential for sleep apnea and recovery insights.

    • Temperature Sensing: Captures illness onset and ovulation cycles.

    • ECG Capability: Unique to premium models for arrhythmia detection.

  2. Battery Life & Charging

    • Range varies from 4–7 days; longer life reduces charging interruptions.

    • Fast-charge features enable quick top-ups before workouts.

  3. App Ecosystem & Analytics

    • Intuitive dashboards for sleep, readiness, activity, and stress.

    • Third-party integrations (Apple Health, Google Fit, Strava) extend utility.

    • Subscription models vs. free core features.

  4. Comfort & Design

    • Weight and material (titanium, stainless steel, aluminum) affect 24/7 wearability.

    • Water- and dust-resistance certifications (IP67/IP68, 5 ATM) for durability.

  5. Notification & On-Device Controls

    • Haptic alerts for calls, messages, and calendar events.

    • On-ring tap gestures or button controls for quick interactions.

  6. Price & Warranty

    • Upfront cost vs. ongoing subscription fees.

    • Warranty coverage for defects and battery performance.

Buying Guide: How to Choose

  1. Define Your Goals:

    • Sleep optimization → prioritize advanced sleep analytics (Oura Ring 4).

    • ECG/medical insights → choose models with on-demand ECG (Samsung Galaxy Ring).

    • Budget-friendly health tracking → RingConn Gen 2 Air offers robust core metrics for free.

    • Metabolic performance → Ultrahuman Ring Air provides unique recovery and metabolism scores.

  2. Evaluate Your Budget:

    • Factor in both device cost and recurring subscription fees.

    • Compare free-vs-paid feature tiers to avoid surprise charges.

  3. Consider Wearability:

    • Try on different ring sizes and materials to ensure comfort.

    • Check waterproof ratings if you swim or shower with your ring.

  4. Review App Experience:

    • Download companion app screenshots and read UI reviews.

    • Ensure compatibility with your smartphone’s OS version.

  5. Assess Data Privacy:

    • Review each company’s data-sharing policies and encryption standards.

    • Opt for brands with transparent privacy practices.

  6. Check Warranty & Support:

    • Longer warranties and responsive customer service can save you headaches.

    • Look for dedicated customer forums or community support channels.

Frequently Asked Questions

Q1. How accurate are smart ring sleep metrics?

Accuracy varies by sensor quality and algorithms. Premium rings like Oura Ring 4 achieve over 90% agreement with polysomnography in clinical studies, while budget models may have wider error margins.

Q2. Can I wear my smart ring 24/7?

Yes—most rings are designed for continuous wear, including during showers and workouts. Ensure your chosen model has at least an IP67 water-resistance rating.

Q3. Do I need a subscription to use these rings?

  • Oura Ring 4: Basic insights free; Advanced analytics require a paid plan.

  • Samsung Galaxy Ring: Health metrics are included; Personalized coaching features may need subscription.

  • RingConn Gen 2 Air: No subscription required for core features.

  • Ultrahuman Ring Air: Base metrics free; Metabolism and guided sessions behind subscription.

Q4. How do I know which ring size fits me?

Most brands send multiple sizing kits or use printable sizing guides. Measure at the end of the day when your fingers are largest for the most accurate fit.

Q5. Can smart rings replace a smartwatch or fitness tracker?

Smart rings excel in sleep and recovery monitoring with minimal intrusion. However, they lack large displays, extensive app ecosystems, and on-ring controls found on smartwatches. Many users wear both for comprehensive coverage.

Conclusion

From clinical-grade sleep analysis (Oura Ring 4) to on-demand ECG (Samsung Galaxy Ring), and from budget-friendly health tracking (RingConn Gen 2 Air) to metabolism-focused insights (Ultrahuman Ring Air), the Best Smart Rings landscape offers something for every goal and budget. By weighing sensor capabilities, battery life, app experience, and ongoing costs, you’ll be well-equipped to select the smart ring that seamlessly integrates into your daily routine—helping you stay healthy, rested, and ready for whatever life throws your way.