In depth comparison and review of OPPO Watch Free and Amazfit GTS 4. 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 | OPPO Watch Free | Amazfit GTS 4 |
|---|
| Product Type | Smart watch | Smart watch |
|---|---|---|
| Operating System | - | Zepp OS |
| Supported Host Device OS | iOS 10 or later, Android 6.0 (Marshmallow) or later | iOS 12 or later, Android 7.0 (Nougat) or later |
| Activity/Sport | Indoor running, indoor walking, elliptical, 5-min workouts, fat burn running, outdoor walking, outdoor running, indoor rowing, endurance running, interval running, jogging | Multisport |
| Wearing Style | Watch style | Watch style |
| Audio Input | - | Microphone |
| Audio Output | - | Speaker |
| Width | - | 36.5 mm |
| Height | - | 42.7 mm |
| Depth | - | 9.9 mm |
| Weight | - | 27 g |
| Body Details | Case only: 20.9 g | - |
| Body Material | Glass fibre reinforced polycarbonate, PA + GF bottom case | Stainless steel, aluminium alloy frame |
| Protection | Water-resistant | Water-resistant |
| Colours | Black | - |
| Clock Display | Yes | Yes |
| FEATURES | OPPO Watch Free | Amazfit GTS 4 |
|---|
| Sensors | Ambient light sensor, SpO2 sensor, 6-axis accelerometer, optical heart sensor, blood oxygen sensor, gyroscope | Accelerometer, ambient light sensor, geomagnetic sensor, barometric altimeter, gyroscope, BioTracker PPG 4.0 biometric sensor |
|---|---|---|
| Tracking Data | Distance, time, calories burned, activity, sleep activity, heart rate, steps taken, blood oxygen saturation, heart rate variability, snoring | 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 | 100+ Workout modes | 154 sports modes |
| Goal Setting | Yes | Yes |
| Features | Call handling, find phone function, inactivity alert, alarm, timer, music playback control, weather information, AI smart watch face, sleep disturbance analysis | 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, instant message reply, PeakBeats workout status algorithm, ExerSense algorithm, Dual-band navigation, linear motor, Virtual Pacer, track run mode, smart trajectory correction, route file import |
| Notifications | SMS, incoming calls | SMS, incoming calls, applications, high and low heart rate, low blood-oxygen, high stress level |
| Vibrating Alert | Yes | Yes |
| Feedback Type | Vibration alert, visual interface | Audio alert, vibration alert, visual interface |
| Internet of Things (IoT) Compatible | - | Yes |
| IoT Intelligent Assistant | - | Alexa built-in |
| IoT Voice Controlled | - | Direct |
| CONNECTIVITY | OPPO Watch Free | Amazfit GTS 4 |
|---|
| Wireless Interface | Bluetooth 5.0 BLE | Wi-Fi, Bluetooth 5.0 |
|---|
| DISPLAY | OPPO Watch Free | Amazfit GTS 4 |
|---|
| Type | AMOLED - colour | AMOLED - colour |
|---|---|---|
| Resolution | 456 x 280 pixels | 390 x 450 pixels |
| Screen Size | 1.64" | 1.75" |
| Pixel Density | 326 ppi | 341 ppi |
| Colour Depth | 24-bit (16.7 million colours) | - |
| Screen Protection | 2.5D curved glass | Tempered glass |
| Always On Display (AOD) | - | Yes |
| INPUT DEVICE | OPPO Watch Free | Amazfit GTS 4 |
|---|
| Type | Touch sensitive screen | Touch sensitive screen, push button |
|---|
| CASE | OPPO Watch Free | Amazfit GTS 4 |
|---|
| Case Shape | Rectangular | Rectangular |
|---|---|---|
| Case Details | - | Aluminium alloy |
| BAND | OPPO Watch Free | Amazfit GTS 4 |
|---|
| Band Type | Strap | Strap |
|---|---|---|
| Band Width | 19 mm | 20 mm |
| Fits Wrist with Circumference | 130-205 mm | 140-200 mm |
| Changeable | Yes | Yes |
| Clasp Type | Buckle | Pin buckle |
| Band Material | Silicone | Fluoroelastomer |
| Band Colour | - | Infinite black | Misty white | Rosebud pink |
| STORAGE | OPPO Watch Free | Amazfit GTS 4 |
|---|
| User Memory | - | 2.3 GB |
|---|
| BATTERY | OPPO Watch Free | Amazfit GTS 4 |
|---|
| Technology | Lithium Ion | - |
|---|---|---|
| Capacity | 235 mAh | 300 mAh |
| Battery Life | 14 day(s) | - |
| Battery Life Details | Typical usage - up to 14 days | Typical usage - up to 8 days Battery Saver Watch Mode - up to 16 days Clock - up to 30 days Heavy usage - up to 4 days Accurate mode (with GPS) - up to 16 hours GPS mode - up to 28 hours Power saving mode (with GPS) - up to 33 hours |
| Rechargeable Battery | Yes | Yes |
| Recharge Time | - | 2 hour(s) |
| MISCELLANEOUS | OPPO Watch Free | Amazfit GTS 4 |
|---|
| Included Accessories | Magnetic charging dock | 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 |
| Manufacturer Model Number | OWWE201 | - |
| Warranty | 2-year warranty | 1-year warranty |
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