The fourth generation Apple Watch was announced in 2018. It features larger displays with thinner bezels and rounded corners, a slightly rounder, thinner chassis with a redesigned ceramic back, a new S4 64-bit dual-core processor capable of up to double the S3's performance, upgraded 16 GB storage, new options for watch face customization, and a new electrical heart sensor which works by measuring the potential difference between the wrist and a finger from the opposing hand into the S4 Module over 30 seconds. The ECG system has received clearance from the United States Food and Drug Administration, a first ever for a consumer device, and is supported by the American Heart Association. This device can also detect falls and will automatically contact emergency services unless the user cancels the outgoing call. The microphone was moved to the opposite side between the side button and the digital crown to improve call quality. Other changes include the digital crown incorporating haptic feedback with the Apple Haptic Engine and includes the new Apple-designed W3 wireless chip.
| NETWORK | Technology | GSM / HSPA / LTE |
|---|
| LAUNCH | Announced | 2018, September |
|---|---|---|
| Status | Available. Released 2018, September |
| BODY | Dimensions | 44 x 38 x 10.7 mm (1.73 x 1.50 x 0.42 in) |
|---|---|---|
| Weight | 36.7 g (1.31 oz) | |
| Build | Glass front, ceramic/sapphire crystal back, aluminum frame | |
| SIM | eSIM | |
| 50m water resistant ECG certified (region dependent SW application; HW available on all models) |
| DISPLAY | Type | Retina LTPO OLED, 1000 nits (peak) |
|---|---|---|
| Size | 1.78 inches, 10.0 cm2 (~60.0% screen-to-body ratio) | |
| Resolution | 448 x 368 pixels (~326 ppi density) | |
| Protection | Ion-X strengthened glass | |
| 3D Touch display |
| PLATFORM | OS | watchOS 5.0, upgradable to 7.1 |
|---|---|---|
| Chipset | Apple S4 | |
| CPU | Dual-core | |
| GPU | PowerVR |
| MEMORY | Card slot | No |
|---|---|---|
| Internal | 16GB 1GB RAM |
| CAMERA | No |
|---|
| SOUND | Loudspeaker | Yes |
|---|---|---|
| 3.5mm jack | No |
| COMMS | WLAN | Wi-Fi 802.11 b/g/n |
|---|---|---|
| Bluetooth | 5.0, A2DP, LE | |
| GPS | Yes, with A-GPS, GLONASS, GALILEO, QZSS | |
| NFC | Yes | |
| Radio | No | |
| USB | No |
| FEATURES | Sensors | Accelerometer, gyro, heart rate (2nd gen), barometer |
|---|---|---|
| Natural language commands and dictation (talking mode) |
| BATTERY | Type | Li-Ion 292 mAh (1.12 Wh), non-removable |
|---|---|---|
| Charging | Wireless charging | |
| Stand-by | Up to 18 h (mixed usage) |
| MISC | Colors | Silver, Gold, Space Gray |
|---|---|---|
| Models | A1975, A1976, A2007, A2008, A1977, A1978 | |
| Price | About 430 EUR |
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