Skip to content
Fathom Layer

Versus Engine

Apple Watch Series 12 vs Circular Ring 2

Specs, price and the one trade-off that actually decides it — Apple Watch Series 12 against Circular Ring 2, side by side.

Cheaper to start

Tie

Both start at a similar price.

Rated higher

Circular Ring 2

8.8 vs 0.0 on our design scale.

Standout

Apple Watch Series 12

S11 chip with 64GB capacity

Apple Watch Series 12

Apple Watch Series 12

Apple Watch Series 12 with S11 chip and Always-On Retina display

Where it wins, where it doesn't

Pros

  • Advanced health and wellness tracking with multiple sensors and apps
  • Robust connectivity options including 5G and LTE
  • Always-On Retina display with high pixel density and brightness

Cons

  • Limited cellular model options may restrict user choice
  • High-end features come at a premium price point

Specifications

  • Sensorssecond‑generation electrical heart sensor, always‑on optical heart sensor, blood oxygen sensor, temperature sensor, Compass, Always‑on altimeter, High‑g accelerometer, High dynamic range gyroscope, Ambient light sensor, Depth gauge to 6 meters, Water temperature sensor
  • AudioSpeaker, Microphone, Media playback
  • Battery—
  • Charging—
  • ChipS11 chip with 64-bit dual-core processor, 4-core Neural Engine, 64GB capacity
  • Compliance—
  • ConnectivitySupport for 2.4GHz and 5GHz Wi‑Fi networks, Wi‑Fi 4 (802.11n), Bluetooth 5.3, Precision L1 GPS (GPS, GLONASS, Galileo, QZSS, and BeiDou), Second‑generation Ultra Wideband chip, Apple Pay, GymKit, FDD‑5G NR (Bands n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n66, n71), TDD‑5G NR (Bands n38, n40, n41), FDD‑LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 66, 71), TDD‑LTE (Bands 38, 39, 40, 41), Supports RedCap for 5G, LTE, International roaming
  • DisplayAlways‑On Retina display with wide‑angle OLEDs and LTPO3, 1Hz refresh, Active area (42mm): 374 by 446 pixels, 326 pixels per inch, Active area (46mm): 416 by 496 pixels, 326 pixels per inch, Ceramic Shield 2 (aluminum cases), Sapphire front crystal (titanium and ceramic cases), 2000 nits peak brightness, 1 nit minimum brightness
  • Environmental RequirementsOperating temperature: 32° to 95° F (0° to 35° C), Nonoperating storage temperature: –4° to 113° F (–20° to 45° C), Relative humidity: 5% to 90% noncondensing, Operating altitude: 0 feet to 10,000 feet (0m to 3000m)
  • Fits wrists130–200mm
  • Hardware and ButtonsDigital Crown, Microphone with Voice Isolation, Side button, Band release button, Speaker
  • Health and WellnessReadiness app, Vitals app with heart rate, respiratory rate, wrist temperature, sleep duration, and heart rate variability (HRV), Blood Oxygen app, ECG app, Heart Rate app, High and low heart rate notifications, Recovery HRV, High‑frequency background heart rate tracking, Irregular rhythm notifications, Advanced Cycle Tracking app with fertile window estimates, retrospective ovulation estimates, and perimenopause and menopause support, Medications app, Mindfulness app with state of mind tracking, Noise app, Sleep app including sleep stages, Sleep score, Sleep apnea notifications, Hypertension notifications
  • Material—
  • Operating SystemwatchOS
  • Power and Battery LifeAll‑day battery life, up to 24 hours of normal use, Up to 38 hours in Low Power Mode, Up to 10 hours outdoor workout, Built‑in rechargeable lithium‑ion battery, Fast‑charge capable, Up to 80% charge in about 30 minutes, 15 minutes for up to 12 hours of normal use, 5 minutes for up to 10 hours of sleep tracking
  • Size—
  • Sizes—
  • Thickness—
  • Water rating—
  • Weight—
  • Weight (aluminum, GPS + Cellular)31.5 grams
  • Weight (aluminum, GPS)32.2 grams
  • Weight (Night Blue ceramic)42.8 grams
  • Weight (Pearl White ceramic)41.7 grams
  • Weight (titanium)36.5 grams
  • Workouts and ActivityRunning, Custom workouts, Customizable Workout Views, Training Load, Heart Rate Zones (customizable), Postworkout heart rate, VO 2 max, Race Route, Pacer, Cadence, Stride Length, Ground Contact Time, Vertical Oscillation, and Running Power, Automatic track detection, Multisport workout, Heart Rate Zone, pace, and target alerts, Hiking, Compass with bearing, incline, elevation, and coordinates, Custom waypoints, Automatically generated waypoints to cellular connectivity, Backtrack GPS data, Offline maps with custom route creation, Topographic maps for thousands of national and regional parks (U.S. only), Hundreds of curated hikes across all 63 U.S. national parks, Cycling
Circular Ring 2

Circular Ring 2

A smart ring with native ECG and no subscription, aimed at the European market.

Where it wins, where it doesn't

Pros

  • Native ECG sensor for AFib detection
  • No subscription — a saving that compounds over years
  • Haptic notifications on the ring itself

Cons

  • Finish and industrial design trail the Oura Ring 4
  • Data interpretation less mature than Oura's
  • Global support network still being established

Specifications

  • SensorsECG, PPG, temperature, 3-axis accelerometer
  • Audio—
  • Battery8 days power mode, 5 days performance
  • Charging30 minutes, wireless case
  • Chip—
  • ComplianceGDPR and HIPAA
  • Connectivity—
  • Display—
  • Environmental Requirements—
  • Fits wrists—
  • Hardware and Buttons—
  • Health and Wellness—
  • MaterialTitanium, hypoallergenic interior
  • Operating System—
  • Power and Battery Life—
  • Size2.55 mm thick, 7.8 mm wide, 3 g
  • SizesUS 6-14
  • Thickness2.55 mm
  • Water ratingIP68
  • Weight3 g
  • Weight (aluminum, GPS + Cellular)—
  • Weight (aluminum, GPS)—
  • Weight (Night Blue ceramic)—
  • Weight (Pearl White ceramic)—
  • Weight (titanium)—
  • Workouts and Activity—