
| Release | April, 2015 |
| Device Name | Apple Watch 38mm (1st Gen) (or Series 0), Original Apple Watch 38mm |
| Device Type | Smartwatch |
| Device Model | A1553 |
| Box Items | Apple Watch, Magnetic charging cable, USB power adapter, Band, Quick start guide |
| Predecessor | None |
| Successor | Apple Watch Series 1 |
| Shape | Rectangular |
| Case Dimensions | 38.6 x 33.3 x 10.5 mm (1.52 x 1.31 x 0.41 in) |
| Case/Bezel | Stainless steel or space black stainless steel case, Ceramic back |
| Replaceable Band | Yes |
| Weight | 40 g body (2.72 oz) |
| IP Rating | IPX7 |
| Water Resistance | Water resistant up to 1 meter and 30 minutes |
| Colors | Stainless Steel/Red, White, Brown/Black/Blue/Red/Marigold/Jay Buckle, Blue/Stone Leather Loop, Silver/Space Black Milanese Loop, Link Bracelet, Space Black Stainless Steel/Black, Black Link Bracelet, Pearl Woven Nylon |
| Type | OLED (Retina display with Force Touch) |
| Screen Size | 1.5 inches |
| Screen Resolution | 340 x 272 pixels |
| Pixel Density | 290 ppi |
| Multi Touch | Yes |
| Screen Protection | Sapphire crystal glass |
| Operating System | watchOS 1.0, upgradable to 4.1 |
| Chipset | Apple S1 |
| CPU | Cortex-A7, 520 MHz |
| GPU | PowerVR SGX543 |
| RAM | 512 MB |
| Internal Memory | 8 GB |
| SD Card Slot | No |
| Technology | No |
| Bands | No |
| SIM | No |
| Speed | No |
| Distance | Yes |
| Heart Rate | Yes |
| Steps | Yes |
| Bluetooth | 4.0, LE |
| GPS | No |
| WiFi | Wi-Fi 802.11b/g/n 2.4GHz |
| NFC | Yes |
| USB | No |
| Radio | No |
| Touch | Yes |
| Watchface | Customizable |
| Voice Command | Yes |
| Personal Assistant | Siri |
| Smartphone Compatibility | iPhone 5 or later |
| Activity Alert | Yes |
| SMS | Yes |
| Yes | |
| Incoming Call Alert | Yes |
| Calendar Reminder | Yes |
| Weather Forecast | Yes |
| Accelerometer | Yes |
| Gyro | Yes |
| Heart Rate | Yes |
| Light | Yes |
| Compass/Magnetometer | - |
| Vibration/Haptics engine | Yes |
| Other Sensors | - |
| Speaker | Yes |
| Microphone | Yes |
| Capacity | 205 mAh |
| Battery Life | Up to 18 h |
| Standby | - |
| Talk-Time | - |
| Wireless Charging | - |
| Charging Time | - |
| Quick Charging | - |
| Language | - |