In depth comparison and review of Apple Watch Ultra 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 | Apple Watch Ultra | Amazfit GTS 4 |
|---|
| Product Type | Smart watch | Smart watch |
|---|---|---|
| Operating System | WatchOS | Zepp OS |
| Supported Host Device OS | iOS 16 or later | iOS 12 or later, Android 7.0 (Nougat) or later |
| Activity/Sport | Multisport | Multisport |
| Wearing Style | Watch style | Watch style |
| Audio Input | Three-microphone array | Microphone |
| Audio Output | Dual speakers | Speaker |
| Width | - | 36.5 mm |
| Height | - | 42.7 mm |
| Depth | - | 9.9 mm |
| Weight | - | 27 g |
| Body Details | Case only: 61.3 g | - |
| Body Material | Aerospace-grade titanium | Stainless steel, aluminium alloy frame |
| Protection | Water-resistant, splash-resistant, corrosion resistant, dust-resistant | Water-resistant |
| Clock Display | Yes | Yes |
| FEATURES | Apple Watch Ultra | Amazfit GTS 4 |
|---|
| Sensors | Accelerometer, ambient light sensor, digital compass, depth gauge, electrical heart sensor, ECG sensor, blood oxygen sensor, gyroscope, water temperature sensor, temperature sensing, optical heart sensor (3d gen), always-on altimeter | 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, blood oxygen saturation, sleep stages, menstrual cycle, ECG, ovulation phase, rapid eye movement (REM), depth | 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 | Night mode | 154 sports modes |
| Goal Setting | Yes | Yes |
| Features | Call handling, store & play music, Fall detection, Emergency SOS, heart rate zones, brightness: 2000 nits, Family Setup support, International Emergency Calling, Siren (86-decibel), Crash Detection, noise monitoring, Compass Waypoint | 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 | Calendar, SMS, Email, high and low heart rate, irregular rhythm, cardio fitness | 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 | Audio alert, vibration alert, visual interface |
| Navigation (GPS) | GPS/GLONASS/Galileo/BeiDou/QZSS receiver | - |
| Payment Technology | Apple Pay | - |
| Internet of Things (IoT) Compatible | Yes | Yes |
| IoT Intelligent Assistant | Siri | Alexa built-in |
| IoT Voice Controlled | Direct | Direct |
| CELLULAR | Apple Watch Ultra | Amazfit GTS 4 |
|---|
| Technology | WCDMA (UMTS) | - |
|---|---|---|
| Mobile Broadband Generation | 4G | - |
| SIM Card Type | Electronic SIM card (e-SIM) | - |
| CONNECTIVITY | Apple Watch Ultra | Amazfit GTS 4 |
|---|
| 3M UMTS Band | Band 1, Band 2, Band 5, Band 8, Band 10 | - |
|---|---|---|
| 4G LTE Band | Band 1, Band 2, Band 3, Band 4, Band 5, Band 6, Band 7, Band 8, Band 18, Band 19, Band 20, Band 25, Band 26, Band 28, Band 39, Band 40, Band 41, Band 66 | - |
| Wireless Interface | IEEE 802.11b/g/n, LTE, Ultra-Wideband (UWB), Bluetooth 5.3 | Wi-Fi, Bluetooth 5.0 |
| DISPLAY | Apple Watch Ultra | Amazfit GTS 4 |
|---|
| Type | Retina LTPO OLED - colour | AMOLED - colour |
|---|---|---|
| Resolution | 410 x 502 pixels | 390 x 450 pixels |
| Screen Size | - | 1.75" |
| Pixel Density | - | 341 ppi |
| Screen Protection | Flat sapphire front crystal with display edge protection | Tempered glass |
| Always On Display (AOD) | Yes | Yes |
| INPUT DEVICE | Apple Watch Ultra | Amazfit GTS 4 |
|---|
| Type | Touch sensitive screen, customisable action button, side button | Touch sensitive screen, push button |
|---|
| CASE | Apple Watch Ultra | Amazfit GTS 4 |
|---|
| Case Size | 49 mm | - |
|---|---|---|
| Case Shape | Rectangular | Rectangular |
| Case Details | Titanium | Aluminium alloy |
| Crown Type | Digital with haptic feedback | - |
| BAND | Apple Watch Ultra | Amazfit GTS 4 |
|---|
| Band Type | Alpine Loop | Strap |
|---|---|---|
| Band Size | S | - |
| Band Width | - | 20 mm |
| Fits Wrist with Circumference | 130-160 mm | 140-200 mm |
| Changeable | Yes | Yes |
| Clasp Type | G-hook | Pin buckle |
| Band Material | Textile | Fluoroelastomer |
| Band Colour | Orange | Green | Yellow/beige | Blue/gray | Starlight | Black/gray | White | Yellow | Midnight | Infinite black | Misty white | Rosebud pink |
| STORAGE | Apple Watch Ultra | Amazfit GTS 4 |
|---|
| Storage Capacity | 32 GB | - |
|---|---|---|
| User Memory | - | 2.3 GB |
| CPU | Apple Watch Ultra | Amazfit GTS 4 |
|---|
| Manufacturer | Apple | - |
|---|---|---|
| CPU Type | S8 SiP | - |
| Features | W3 Apple wireless chip, U1 chip | - |
| BATTERY | Apple Watch Ultra | Amazfit GTS 4 |
|---|
| Technology | Lithium Ion | - |
|---|---|---|
| Capacity | - | 300 mAh |
| Battery Life | 36 hours | - |
| Battery Life Details | Normal use - up to 36 hour(s) With LTE - up to 18 hour(s) Power saving mode - up to 60 hour(s) |
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) |
| Wireless Charging | Yes | - |
| MISCELLANEOUS | Apple Watch Ultra | Amazfit GTS 4 |
|---|
| Included Accessories | Magnetic fast charger to USB-C cable (1 m) | Magnetic charging cable |
|---|---|---|
| Preloaded Software | GymKit, Oceanic+ | To Do List, Games, Stopwatch, Calendar, World clock, Alarm Clock, Reminders, Timer, Compass, Countdown timer |
| Compliant Standards | IP6X, MIL-STD-810H, EN13319 | - |
| SAR Value | 0.35 W/kg (head), 0.6 W/kg (limb) | - |
| Max Depth of Water Resistance | 100 m | 50 m |
| Max Operating Temperature | 55 °C | 45 °C |
| Min Operating Temperature | -20 °C | 0 °C |
| Manufacturer Model Number | A2684 | - |
| Warranty | 1-year warranty | 1-year warranty |
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