Versus Engine
Apple Watch Ultra 4 vs Circular Ring 2
Specs, price and the one trade-off that actually decides it — Apple Watch Ultra 4 against Circular Ring 2, side by side.
Cheaper to start
Circular Ring 2
Starts about $500 lower.
Rated higher
Circular Ring 2
8.8 vs 0.0 on our design scale.
Standout
Circular Ring 2
Native ECG sensor for AFib detection
Apple Watch Ultra 4
Apple's outdoor and endurance flagship watch, built around the S11 chip and up to 84 hours of battery life in Low Power Mode.
Specifications
- Battery—
- Battery / Extended WorkoutUp to 25 hours with full GPS and heart rate
- Battery / Fast Charge15 minutes adds up to 18 hours
- Battery / Low Power ModeUp to 84 hours
- Battery / Max Extended WorkoutUp to 45 hours for outdoor activity tracking
- Battery / Normal UseMore than 2 days, up to 50 hours
- Case MaterialNatural or black titanium, 100% recycled titanium in the case, 45% recycled content overall
- Charging—
- ChipApple S11
- Compliance—
- Connectivity / CellularCellular capable
- Connectivity / GPSOn-device GPS, Apple's most accurate yet in a sports watch
- Connectivity / SatelliteSatellite communications
- Health / Heart RateContinuous measurement every 5 seconds, all day
- Health / Heart SensorsOptical (larger, power-efficient green LEDs) and electrical heart sensors
- Health / HRVMeasured up to 24x more often than the previous generation
- Material—
- Sensors—
- Size—
- Sizes—
- SoftwarewatchOS 27
- Thickness—
- Water rating—
- Weight—
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
- Battery8 days power mode, 5 days performance
- Battery / Extended Workout—
- Battery / Fast Charge—
- Battery / Low Power Mode—
- Battery / Max Extended Workout—
- Battery / Normal Use—
- Case Material—
- Charging30 minutes, wireless case
- Chip—
- ComplianceGDPR and HIPAA
- Connectivity / Cellular—
- Connectivity / GPS—
- Connectivity / Satellite—
- Health / Heart Rate—
- Health / Heart Sensors—
- Health / HRV—
- MaterialTitanium, hypoallergenic interior
- SensorsECG, PPG, temperature, 3-axis accelerometer
- Size2.55 mm thick, 7.8 mm wide, 3 g
- SizesUS 6-14
- Software—
- Thickness2.55 mm
- Water ratingIP68
- Weight3 g