Apple Watch Ultra 3 GPS + Cellular

Model: Apple Watch Ultra 3
Connectivity: GPS + Cellular (AT&T compatible)
Case Size: 49 mm
Case Material: Titanium
Band: Black Ocean Band
Release Year: 2025

Display

• Display Type: Always-On Retina LTPO OLED

• Size: 49 mm

• Brightness: up to 3000 nits peak outdoor brightness

Performance

• Processor: S9 SiP with 64-bit dual-core processor

• Neural Engine: Yes, for on-device machine learning

• Storage: 32 GB internal storage (nominal Apple Watch spec)

Connectivity

• Cellular: LTE / 5G-capable eSIM (AT&T support)

• Wi-Fi: 802.11b/g/n

• Bluetooth: Bluetooth 5.x

• GPS: Dual-frequency GPS (L1 + L5)

Sensors

• Heart Rate Sensor: Optical heart rate

• Blood Oxygen: SpO2 sensor

• ECG (Electrocardiogram): Yes

• Temperature Sensor: Yes

• Accelerometer, Gyroscope, Compass: Yes

• Ambient Light Sensor: Yes

Health & Activity Features

• Heart rate monitoring

• Blood oxygen measurement

• ECG app

• Temperature sensing for sleep and cycle tracking

• Fall detection

• Crash detection

• Workout tracking with advanced metrics

Battery & Power

• Battery Life: up to ~36 hours typical use

• Extended battery modes: up to ~72 hours with Low Power settings (varies by use)

• Charging: Magnetic fast charging

Water & Durability

• Water Resistance: WR100 (swim, water sports)

• EN13319 certified dive-ready

• MIL-STD 810H rugged standard

Operating System

• watchOS (latest compatible version)

Compatibility

• Requires iPhone with the latest iOS version

• Works with Apple Fitness+, Health, and other Apple services