Best Smart Rings for 2025 — what they do, who they’re for, and top picks

Smart rings are no longer a niche. With celebrity adoption, NBA pilot programs (e.g., Oura) and big launches like Samsung’s Galaxy Ring, these tiny wearables are mainstreaming. They shrink many of the sensors you’d find in a smartwatch into a discreet ring that tracks activity, heart rate, temperature and sleep.

Why choose a smart ring?

Pros: small, discreet, often more accurate for heart rate and temperature, long battery life compared to many smartwatches. Cons: fewer features (no screen, NFC payments, fall detection or native apps), potential discomfort during grip-heavy workouts, and some features locked behind subscriptions.

What smart rings can track

• Movement (accelerometer/gyroscope) — activity and sleep patterns
• Heart rate & SpO2 (PPG sensors)
• Skin/body temperature — useful for infection detection and menstrual-cycle prediction
• ECG (some models like Circular’s Ring 2 offer single-lead ECG)
• Stress, recovery, and meditation metrics via algorithmic summaries

Who should consider a smart ring?

People who want discreet, always-on health tracking without a wrist device; those who dislike watches; or users prioritizing sleep/heart/temperature monitoring over smartwatch features. If gripping (weights, bars) is a big part of your routine, a wrist device may be more comfortable.

Buying considerations

• Decide what you want tracked (sleep, recovery, menstrual cycle, ECG).
• Sizing: most makers send a sizing kit; rings can’t usually be resized like jewelry.
• Battery life: most rings last ~5+ days; bigger rings typically last longer.
• Loss & tracking: some apps offer “Find My Ring” or last-seen location; rings don’t usually have speakers.
• Long-term costs: check for subscription features or paid extras.

Top smart rings to consider (2025)

• Oura Ring (Gen 4) — Premium sleep and health tracking with long battery life. Official: https://ouraring.com
  Amazon search: Oura Ring Gen 4 on Amazon
• Samsung Galaxy Ring — Sleek design, skin temperature and heart tracking; integrates with Samsung ecosystem. Official: https://www.samsung.com/global/galaxy-ring/
  Amazon search: Samsung Galaxy Ring on Amazon
• Circular Ring 2 — Advanced health tracker offering a one-line ECG and AFib detection (availability may vary). Official: https://circular.health/products/circular-ring-2
  Amazon search: Circular Ring 2 on Amazon
• Ultrahuman Ring Air — Fitness-oriented ring with PPG and motion sensors. Official: https://ultrahuman.com/products/ultrahuman-ring-air
  Amazon search: Ultrahuman Ring Air on Amazon
• Evie (Movano) — Focused on reproductive-cycle tracking and women’s health features; availability limited. Official: https://movano.com/products/evie-ring
  Amazon search: Evie Ring on Amazon
• RingConn Gen 2 — Budget-friendly option with sleep and health tracking. Official: https://ringconn.com
  Amazon search: RingConn Gen 2 on Amazon
• Amazfit Helio Ring — Value-driven ring with competitive sensors and battery life. Official: https://us.amazfit.com/helio-ring
  Amazon search: Amazfit Helio Ring on Amazon

Final takeaway

Smart rings trade breadth of features for discretion and often stronger continuous physiological sensing. They’re best if you want lightweight, always-on health monitoring (especially sleep and heart metrics) and don’t need the extra features of a smartwatch. Check sizing, battery life and whether key features require a subscription before buying.

Note: This summary is based on reporting and product info for 2025. It does not repost or link to the original Engadget review that inspired this roundup.