| Hardware & Buttons | Microphone, Speaker, Customizable Action button, Siren/Speaker, Antennas (GPS, cellular), Side button, Digital Crown, Depth gauge/Water temperature sensor/Altimeter |
| Controls | Customizable Action button, Digital Crown w/ haptic feedback, Side button, Double tap & wrist flick gestures |
| Chip | S10 chip (64-bit dual-core), 4-core Neural Engine, 64GB capacity |
| Sensors | Electrical heart sensor, Third-gen optical heart sensor, Blood oxygen sensor, Temperature sensor, Depth gauge, Water temp sensor, Compass, Altimeter (always-on), Accelerometer (high-g), Gyroscope (HDR), Ambient light sensor |
| Health & Wellness Apps | Blood Oxygen app, ECG app, Cycle Tracking (retrospective ovulation), Heart Rate app, Medications, Mindfulness, Noise, Sleep app (stages), Sleep score, Sleep apnea notifications, High/low heart rate alerts, Irregular rhythm alerts |
| Display | Always-On Retina with wide-angle OLEDs (LTPO3), 1Hz refresh, Flat sapphire crystal, 422×514 px, 326 ppi, 1245 sq mm area, Up to 3000 nits peak/1 nit min, Night Mode for Ultra faces |
| Audio | Three-microphone array w/ beamforming, Dual speakers, Siren, Wind noise mitigation, Media playback |
| Power & Battery | Multiday up to 42 hrs normal, 72 hrs Low Power Mode, Fast-charge capable (80% in ~45 mins), 15 mins = up to 12h, 5 mins = up to 8h sleep tracking, Built-in lithium-ion |
| Operating System | watchOS: most advanced features for activity, health, safety, and connectivity |
| Workouts/Activity | Running, Custom workouts, Training Load/Effort, VO2 max, Race Route, Pacer, Stride Length, Multisport, Cycling (speed, cadence, power), Swimming (pool/open, auto sets, temp), Diving (rec 40m, auto launch, GPS entry/exit), Hiking (compass, topographic maps, curated hikes), Skiing, Rowing, Yoga, Multisport, and more |
| Safety | Emergency SOS, Intl emergency calling, Siren, Flashlight, Crash/Fall Detection, Backtrack, Noise monitoring, Last Call Waypoint |
| Durability | Water 100m (ISO 22810:2010), Dust IP6X, EN13319 scuba (to 40m ± 1m), MIL-STD 810H: altitude, temperature, shock, etc., Sapphire crystal front, Titanium case |
| Connectivity | L1/L5 dual freq GPS, Cellular: 5G/LTE, Wi-Fi 4 (2.4/5GHz), Bluetooth 5.3, Ultra Wideband 2, NFC Apple Pay, GymKit, Apple Watch For Your Kids |
| Accessibility | VoiceOver, Zoom, On/Off Labels, Contrast, Color Filters, Reduce Motion, Chimes, AssistiveTouch, Button Speed, Touch Accommodations, Auto-Answer, Live Speech, Taptic Time, Live Listen, Shortcuts, Mono Audio |
| Size & Weight | Height: 49 mm, Width: 44 mm, Depth: 12 mm, Weight: 61.6 g (natural), 61.8 g (black) |
| Compatibility | Requires iPhone 11 or later (incl. SE 2nd gen+) with iOS 26 or later |
| In the Box | Apple Watch Ultra 3, Strap, 1m USB-C Magnetic Fast Charger Cable |