Side by side comparison and review of Apple Watch Series 4 (GPS + Cellular) and Garmin Forerunner 45S. Compare design, displays, functions, batteries and other key specifications and features to simplify the choice of your perfect smartwatch. Our goal is to make it easier for you to decide on the watch that will best meet your expectations by revealing the main differences between the products.
| GENERAL | Apple Watch Series 4 (GPS + Cellular) | Garmin Forerunner 45S |
|---|
| Product Type | Smart watch | Sport watch |
|---|---|---|
| Operating System | WatchOS 5 | - |
| Supported Host Device OS | iOS | iOS, Android |
| Wearing Style | Watch style | Watch style |
| Audio Input | Microphone | - |
| Audio Output | Speaker | - |
| Width | 34 mm | 39.5 mm |
| Height | 40 mm | 39.5 mm |
| Depth | 10.7 mm | 11.4 mm |
| Weight | 39.8 g | 32 g |
| Body Material | Stainless steel | - |
| Protection | Waterproof | Waterproof |
| Clock Display | Yes | Yes |
| FEATURES | Apple Watch Series 4 (GPS + Cellular) | Garmin Forerunner 45S |
|---|
| Sensors | Accelerometer, ambient light sensor, gyro sensor, barometric altimeter, optical heart sensor, electrical heart sensor | Accelerometer, heart rate |
|---|---|---|
| Tracking Data | Distance, time, calories burned, activity, heart rate, steps taken, UV index, Air Quality index | Distance, time, speed, calories burned, sleep activity, heart rate, stress level |
| Goal Setting | Yes | Yes |
| Features | Music remote handling, ECG accurate heart rate, listening to music, Retina Display technology, call alerts, automatic exercise recognition, Fall detection, Emergency SOS | Music remote handling, find phone function, HR zones, Move IQ, Garmin Connect compatible, Find my Device |
| Notifications | Calendar, SMS, Email | Calendar, Email, social apps |
| Vibrating Alert | Yes | Yes |
| Feedback Type | Audio alert, vibration alert, visual interface | - |
| Navigation (GPS) | GPS/GLONASS/Galileo/QZSS receiver | - |
| Payment Technology | Apple Pay | - |
| IoT Intelligent Assistant | Siri | - |
| CELLULAR | Apple Watch Series 4 (GPS + Cellular) | Garmin Forerunner 45S |
|---|
| Technology | WCDMA (UMTS) / GSM | - |
|---|---|---|
| Mobile Broadband Generation | 4G | - |
| SIM Card Type | Electronic SIM card (e-SIM) | - |
| Messaging Services | SMS | - |
| Supported Mobile Messaging Services | SMS | - |
| CONNECTIVITY | Apple Watch Series 4 (GPS + Cellular) | Garmin Forerunner 45S |
|---|
| Wireless Interface | IEEE 802.11b/g/n, Bluetooth 5.0 | Bluetooth, ANT+ |
|---|
| DISPLAY | Apple Watch Series 4 (GPS + Cellular) | Garmin Forerunner 45S |
|---|
| Type | LTPO OLED - colour | Memory-in-Pixel LCD - colour - transflective |
|---|---|---|
| Resolution | 324 x 394 pixels | 208 x 208 pixels |
| Screen Size | 1.57" | 1.04" |
| Screen Protection | Sapphire glass | - |
| INPUT DEVICE | Apple Watch Series 4 (GPS + Cellular) | Garmin Forerunner 45S |
|---|
| Type | Touch sensitive screen (Force Touch) | - |
|---|
| CASE | Apple Watch Series 4 (GPS + Cellular) | Garmin Forerunner 45S |
|---|
| Case Size | 40 mm | - |
|---|---|---|
| Case Shape | Rectangular | Round |
| Case Back | Sapphire crystal and ceramic back | - |
| Case Details | Stainless steel | Space grey aluminium | Space black stainless steel | Silver aluminium | Gold aluminium | Gold stainless steel | White | Iris | Black |
| Crown Type | Digital with haptic feedback | - |
| BAND | Apple Watch Series 4 (GPS + Cellular) | Garmin Forerunner 45S |
|---|
| Band Type | Milanese loop | Band |
|---|---|---|
| Band Size | - | S |
| Fits Wrist with Circumference | 130-180 mm | 124-185 mm |
| Changeable | - | Yes |
| Clasp Type | Magnetic closure | Buckle |
| Band Material | Steel mesh | Silicone |
| Band Colour | White | Black | Pink sand | Space black | Gold | Seashell | Stone | White | Iris | Black |
| STORAGE | Apple Watch Series 4 (GPS + Cellular) | Garmin Forerunner 45S |
|---|
| Storage Capacity | 16 GB | - |
|---|
| CPU | Apple Watch Series 4 (GPS + Cellular) | Garmin Forerunner 45S |
|---|
| Manufacturer | Apple | - |
|---|---|---|
| CPU Type | S4 | - |
| Features | W3 Apple wireless chip | - |
| BATTERY | Apple Watch Series 4 (GPS + Cellular) | Garmin Forerunner 45S |
|---|
| Technology | Lithium Ion | - |
|---|---|---|
| Battery Life | 18 hours | - |
| Battery Life Details | - | GPS mode - up to 13 hour(s) Smartwatch mode - up to 7 days |
| Rechargeable Battery | Yes | - |
| Wireless Charging | Yes | - |
| MISCELLANEOUS | Apple Watch Series 4 (GPS + Cellular) | Garmin Forerunner 45S |
|---|
| Included Accessories | Power adapter, magnetic charging cable | Charging/data cable |
|---|---|---|
| Preloaded Software | Apple Pay | - |
| SAR Value | 0.27 W/kg (head), 0.26 W/kg (limb) | - |
| Max Depth of Water Resistance | 50 m | 50 m |
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