Apple Watch (1st gen)
Quick details
Released
April 2015
Dimensions
42.0 x 35.9 x 10.5 mm; 38.6 x 33.3 x 10.5 mm
Operating system
watchOS
Display 38 mm or 42 mm case Retina OLED with Force Touch
Battery life Up to 18 hours
Water resistance IPX7 splash and water resistant; submersion not recommended
GPS No
Sensors Optical heart rate, accelerometer, gyroscope, ambient light
Links Read review
Technical specifications
General
Release date 2015-04-24
Product type Smartwatch
Physical size 42.0 x 35.9 x 10.5 mm; 38.6 x 33.3 x 10.5 mm
Weight 25-69 g depending collection, size and case material
Material Aluminum (Sport), stainless steel, or 18-karat gold (Edition)
Water resistance IPX7 splash and water resistant; submersion not recommended
Color options Silver/Space Gray aluminum; stainless steel/Space Black; 18K yellow or rose gold Edition
Display type Retina OLED with Force Touch
Display size 38 mm or 42 mm case
Display resolution 38 mm: 272 x 340 pixels; 42 mm: 312 x 390 pixels
Display brightness Up to 450 nits
Display protection Ion-X glass (Sport); sapphire crystal (stainless steel/Edition)
Battery Rechargeable lithium-ion battery
Battery life Up to 18 hours
Charging Magnetic charging cable
Sensors
GNSS type Connected GPS
GPS No
GALILEO No
GLONASS No
QZSS No
Beidou No
Accelerometer Yes
Gyroscope Yes
Barometric altimeter No
Compass No
Ambient light sensor Yes
Optical heart rate Yes
Electrical heart rate No
SpO2 No
Temperature No
Galvanic skin response No
Microphone Yes
Speakers Yes
Vibration motor Yes
Health & activity tracking
Steps Yes
Distance Yes
Calories burned Yes
Floors No
Sports tracking Yes
Sleep No
Heart rate Yes
HRV Yes
Stress No
Blood oxygen No
Respiration rate No
Skin temperature No
ECG No
Blood pressure No
Body composition No
Glucose No
Hydration level No
UV exposure No
Calorie intake No
Hyperglycemia risk assessment No
Arterial stiffness detection No
Pulse wave arrhythmia analysis No
Daily smart features
Smartphone compatibility iPhone 5 or later
Operating system at launch watchOS
Processor Apple S1
Storage 8 GB
Bluetooth Yes (4.0)
Wi-Fi Yes (Wi-Fi 4 / 802.11n, 2.4 GHz)
NFC / connected pay Yes (Apple Pay)
UWB No
Cellular No
Smartphone notifications Yes
Bluetooth calling Yes (via paired iPhone)
Smartphone music control Yes
On-board music storage Yes
Voice assistant Siri
Links
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These technical specs are correct to the best of our knowledge at the time of publishing.