In depth comparison and review of Garmin Forerunner 45S and Samsung Galaxy Watch4. Compare sizes, functions, displays, batteries and other important specifications and features to easily choose the right smartwatch for you. Our goal is to help you uncover differences between the products and find the watch that will best fit your needs.
| GENERAL | Garmin Forerunner 45S | Samsung Galaxy Watch4 |
|---|
| Product Type | Sport watch | Smart watch |
|---|---|---|
| Operating System | - | Wear OS by Samsung |
| Supported Host Device OS | iOS, Android | Android 6.0 (Marshmallow) or later |
| Wearing Style | Watch style | Watch style |
| Width | 39.5 mm | 39.3 mm |
| Height | 39.5 mm | 40.4 mm |
| Depth | 11.4 mm | 9.7 mm |
| Weight | 32 g | 25.9 g |
| Body Material | - | Aluminium |
| Protection | Waterproof | Waterproof |
| Clock Display | Yes | Yes |
| FEATURES | Garmin Forerunner 45S | Samsung Galaxy Watch4 |
|---|
| Sensors | Accelerometer, heart rate | Accelerometer, ambient light sensor, barometer, gyro sensor, bioimpedance sensor, electromagnetic compass, optical heart sensor, electrical heart sensor |
|---|---|---|
| Tracking Data | Distance, time, speed, calories burned, sleep activity, heart rate, stress level | Distance, calories burned, activity, sleep activity, heart rate, steps taken, blood oxygen saturation, body composition, ECG, REM phases |
| Goal Setting | Yes | Yes |
| Features | Music remote handling, find phone function, HR zones, Move IQ, Garmin Connect compatible, Find my Device | Find phone function, VO2 max, automatic exercise recognition, personalised coaching |
| Notifications | Calendar, Email, social apps | Calendar, SMS, social apps, incoming calls |
| Vibrating Alert | Yes | Yes |
| Feedback Type | - | Vibration alert, visual interface |
| Digital Player | - | MP3, WAV, AAC, AMR, M4A, OGG, 3GA, AWB, OGA |
| Navigation (GPS) | - | GPS/GLONASS/Galileo/BeiDou receiver |
| CELLULAR | Garmin Forerunner 45S | Samsung Galaxy Watch4 |
|---|
| Technology | - | WCDMA (UMTS) |
|---|---|---|
| Mobile Broadband Generation | - | 4G |
| SIM Card Type | - | Electronic SIM card (e-SIM) |
| CONNECTIVITY | Garmin Forerunner 45S | Samsung Galaxy Watch4 |
|---|
| Wireless Interface | Bluetooth, ANT+ | NFC, IEEE 802.11a/b/g/n, Bluetooth 5.0 |
|---|---|---|
| Bluetooth Profiles | - | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) |
| DISPLAY | Garmin Forerunner 45S | Samsung Galaxy Watch4 |
|---|
| Type | Memory-in-Pixel LCD - colour - transflective | Super AMOLED - colour |
|---|---|---|
| Resolution | 208 x 208 pixels | 396 x 396 pixels |
| Screen Size | 1.04" | 1.19" |
| Aspect Ratio | - | Full circle |
| Pixel Density | - | 330 ppi |
| Colour Depth | - | 24-bit (16.7 million colours) |
| Screen Protection | - | Corning Gorilla Glass DX+ (scratch resistant glass) |
| Always On Display (AOD) | - | Yes |
| INPUT DEVICE | Garmin Forerunner 45S | Samsung Galaxy Watch4 |
|---|
| Type | - | Touch sensitive screen, push buttons |
|---|
| CASE | Garmin Forerunner 45S | Samsung Galaxy Watch4 |
|---|
| Case Size | - | 40 mm |
|---|---|---|
| Case Shape | Round | Round |
| Case Details | White | Iris | Black | Pink gold | Black | Silver |
| BAND | Garmin Forerunner 45S | Samsung Galaxy Watch4 |
|---|
| Band Type | Band | Sport band |
|---|---|---|
| Band Size | S | - |
| Fits Wrist with Circumference | 124-185 mm | - |
| Changeable | Yes | Yes |
| Clasp Type | Buckle | Buckle |
| Band Material | Silicone | - |
| Band Colour | White | Iris | Black | Pink | Black | White |
| STORAGE | Garmin Forerunner 45S | Samsung Galaxy Watch4 |
|---|
| Storage Capacity | - | 16 GB |
|---|---|---|
| User Memory | - | 7.6 GB |
| RAM | Garmin Forerunner 45S | Samsung Galaxy Watch4 |
|---|
| RAM Size | - | 1.5 GB |
|---|
| CPU | Garmin Forerunner 45S | Samsung Galaxy Watch4 |
|---|
| Manufacturer | - | Samsung |
|---|---|---|
| CPU Type | - | Exynos W920 |
| Clock Speed | - | 1.18 GHz |
| BATTERY | Garmin Forerunner 45S | Samsung Galaxy Watch4 |
|---|
| Capacity | - | 247 mAh |
|---|---|---|
| Battery Life | - | 40 hours |
| Battery Life Details | GPS mode - up to 13 hour(s) Smartwatch mode - up to 7 days |
- |
| Rechargeable Battery | - | Yes |
| Wireless Charging | - | Yes |
| Wireless Charging Standards | - | WPC, Wireless PowerShare |
| MISCELLANEOUS | Garmin Forerunner 45S | Samsung Galaxy Watch4 |
|---|
| Included Accessories | Charging/data cable | Wireless charging dock |
|---|---|---|
| Compliant Standards | - | MIL-STD 810G, IP68 |
| SAR Value | - | 0.729 W/kg (head), 2.594 W/kg (limb) |
| Max Depth of Water Resistance | 50 m | 50 m |
| Manufacturer Model Number | - | SM-R865F |
| Warranty | - | 2-year warranty |
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