Side by side comparison and review of Garmin Forerunner 45 and Amazfit GTR 4. 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 | Garmin Forerunner 45 | Amazfit GTR 4 |
|---|
| Product Type | Smart watch | Smart watch |
|---|---|---|
| Operating System | - | Zepp OS |
| Supported Host Device OS | iOS, Android | iOS 12 or later, Android 7.0 (Nougat) or later |
| Activity/Sport | - | Multisport |
| Wearing Style | Watch style | Watch style |
| Audio Input | - | Microphone |
| Audio Output | - | Speaker |
| Width | 42 mm | - |
| Height | 42 mm | - |
| Depth | 11.4 mm | - |
| Weight | 36 g | - |
| Body Details | - | With band: 34 g |
| Body Material | - | Aluminium alloy frame |
| Protection | Waterproof | Water-resistant |
| Clock Display | Yes | Yes |
| FEATURES | Garmin Forerunner 45 | Amazfit GTR 4 |
|---|
| Sensors | Accelerometer, heart rate | Accelerometer, ambient light sensor, geomagnetic sensor, barometric altimeter, gyroscope, BioTracker PPG 4.0 biometric sensor |
|---|---|---|
| Tracking Data | Distance, time, speed, calories burned, sleep activity, heart rate, stress level | Time, calories burned, activity, sleep activity, heart rate, steps taken, blood oxygen saturation, sleep stages, stress level, menstrual cycle, personal activity intelligence (PAI), recovery time, training load, sleep quality score, nap, sleep breathing quality |
| Modes | - | 154 sports modes |
| Goal Setting | Yes | Yes |
| Features | Music remote handling, find phone function, HR zones, Move IQ, Garmin Connect compatible, Find my Device | Strength training guidance, camera remote control, find phone function, answering a call, VO2 max, making a call, Find my Device, breathing training function, store & play music, sunrise/sunset times, auto pause, auto lap, realtime location tracking, music playback control, weather information, PeakBeats workout status algorithm, ExerSense algorithm, Dual-band navigation, linear motor, Virtual Pacer, track run mode, smart trajectory correction, route file import |
| Notifications | Calendar, Email, social apps | SMS, incoming calls, applications, high and low heart rate, low blood-oxygen, high stress level |
| Vibrating Alert | Yes | Yes |
| Feedback Type | - | Audio alert, vibration alert, visual interface |
| Internet of Things (IoT) Compatible | - | Yes |
| IoT Intelligent Assistant | - | Alexa built-in |
| IoT Voice Controlled | - | Direct |
| CONNECTIVITY | Garmin Forerunner 45 | Amazfit GTR 4 |
|---|
| Wireless Interface | Bluetooth, ANT+ | Wi-Fi, Bluetooth 5.0 BLE |
|---|
| DISPLAY | Garmin Forerunner 45 | Amazfit GTR 4 |
|---|
| Type | Memory-in-Pixel LCD - colour - transflective | AMOLED - colour |
|---|---|---|
| Resolution | 208 x 208 pixels | 466 x 466 pixels |
| Screen Size | 1.04" | 1.43" |
| Pixel Density | - | 326 ppi |
| Screen Protection | - | Fingerprint-resistant coating, tempered glass, anti-glare bezel |
| Always On Display (AOD) | - | Yes |
| INPUT DEVICE | Garmin Forerunner 45 | Amazfit GTR 4 |
|---|
| Type | - | Touch sensitive screen, push buttons |
|---|
| CASE | Garmin Forerunner 45 | Amazfit GTR 4 |
|---|
| Case Shape | Round | Circular |
|---|---|---|
| Case Back | - | Polycarbonate |
| Case Details | Black | Aluminium alloy |
| BAND | Garmin Forerunner 45 | Amazfit GTR 4 |
|---|
| Band Type | Band | Strap |
|---|---|---|
| Band Size | L | - |
| Band Width | - | 22 mm |
| Fits Wrist with Circumference | 129-197 mm | 150-215 mm |
| Changeable | Yes | Yes |
| Clasp Type | Buckle | Pin buckle |
| Band Material | Silicone | Fluoroelastomer |
| Band Colour | Black | Lava red | Superspeed black | Vintage brown leather |
| STORAGE | Garmin Forerunner 45 | Amazfit GTR 4 |
|---|
| User Memory | - | 2.3 GB |
|---|
| BATTERY | Garmin Forerunner 45 | Amazfit GTR 4 |
|---|
| Capacity | - | 475 mAh |
|---|---|---|
| Battery Life Details | GPS mode - up to 13 hour(s) Smartwatch mode - up to 7 days |
Typical usage - up to 14 days Battery Saver Watch Mode - up to 24 days Clock - up to 50 days Heavy usage - up to 7 days Accurate mode (with GPS) - up to 25 hours GPS mode - up to 44 hours Power saving mode (with GPS) - up to 52 hours |
| Rechargeable Battery | - | Yes |
| Recharge Time | - | 2 hour(s) |
| MISCELLANEOUS | Garmin Forerunner 45 | Amazfit GTR 4 |
|---|
| Included Accessories | Charging/data cable | Magnetic charging cable |
|---|---|---|
| Preloaded Software | - | To Do List, Games, Stopwatch, Calendar, World clock, Alarm Clock, Reminders, Timer, Compass, Countdown timer |
| Max Depth of Water Resistance | 50 m | 50 m |
| Max Operating Temperature | - | 45 °C |
| Min Operating Temperature | - | 0 °C |
| Warranty | - | 1-year warranty |
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