In depth comparison and review of ASUS ZenWatch 3 WI503Q and Apple Watch Ultra 2. 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 | ASUS ZenWatch 3 WI503Q | Apple Watch Ultra 2 |
|---|
| Product Type | Smart watch | Smart watch |
|---|---|---|
| Operating System | Android Wear | WatchOS 10 |
| Supported Host Device OS | Android 4.3 (Jelly Bean) or later, iOS 8.2 or later | iOS 17 or later |
| Activity/Sport | - | Multisport, custom workouts |
| Wearing Style | Watch style | Watch style |
| Audio Input | Microphone | Three-microphone array |
| Audio Output | Speaker | Dual speakers |
| Body Details | Main unit: 60 g Wrist strap: 20 g |
Case only: 61.4 g |
| Body Material | 316L stainless steel alloy | Aerospace-grade titanium |
| Protection | Waterproof | Water-resistant, splash-resistant, corrosion resistant, dust-resistant |
| Clock Display | Yes | Yes |
| FEATURES | ASUS ZenWatch 3 WI503Q | Apple Watch Ultra 2 |
|---|
| Sensors | Ambient light sensor, 6-axis accelerometer | 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 |
|---|---|---|
| Tracking Data | Distance, calories burned, activity, steps taken | Distance, time, calories burned, activity, sleep activity, heart rate, blood oxygen saturation, sleep stages, menstrual cycle, ECG, ovulation phase, rapid eye movement (REM), depth |
| Modes | - | Night mode |
| Goal Setting | Yes | Yes |
| Features | Call handling, camera remote control, phone unlocking | Call handling, store & play music, Fall detection, Emergency SOS, heart rate zones, Family Setup support, International Emergency Calling, Siren (86-decibel), Crash Detection, noise monitoring, Compass Waypoint, precision finding for iPhone, brightness: 3000 nits, flashlight boost, track detection |
| Notifications | Calendar, SMS, Email | Calendar, SMS, Email, high and low heart rate, irregular rhythm, cardio fitness |
| Vibrating Alert | Yes | Yes |
| Feedback Type | - | Audio alert, vibration alert, visual interface |
| Navigation (GPS) | - | GPS/GLONASS/Galileo/BeiDou/QZSS receiver |
| Payment Technology | - | Apple Pay |
| Internet of Things (IoT) Compatible | - | Yes |
| IoT Intelligent Assistant | - | Siri |
| IoT Voice Controlled | - | Direct |
| CELLULAR | ASUS ZenWatch 3 WI503Q | Apple Watch Ultra 2 |
|---|
| Technology | - | WCDMA (UMTS) |
|---|---|---|
| Mobile Broadband Generation | - | 4G |
| SIM Card Type | - | Electronic SIM card (e-SIM) |
| CONNECTIVITY | ASUS ZenWatch 3 WI503Q | Apple Watch Ultra 2 |
|---|
| 3M UMTS Band | - | Band 1, Band 2, Band 5, 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, Bluetooth 4.1 | IEEE 802.11b/g/n, LTE, Ultra-Wideband (UWB), Bluetooth 5.3 |
| DISPLAY | ASUS ZenWatch 3 WI503Q | Apple Watch Ultra 2 |
|---|
| Type | AMOLED - colour | Retina LTPO OLED - colour |
|---|---|---|
| Resolution | 400 x 400 pixels | 410 x 502 pixels |
| Screen Size | 1.39" | - |
| Pixel Density | 287 ppi | - |
| Screen Protection | Corning Gorilla Glass 3 (scratch resistant glass), 2.5D Arc Glass | Flat sapphire front crystal with display edge protection |
| Always On Display (AOD) | - | Yes |
| INPUT DEVICE | ASUS ZenWatch 3 WI503Q | Apple Watch Ultra 2 |
|---|
| Touchscreen Technology | Capacitive | - |
|---|---|---|
| Type | Touch sensitive screen (multi-touch) | Touch sensitive screen, customisable action button, side button, double tap gesture |
| CASE | ASUS ZenWatch 3 WI503Q | Apple Watch Ultra 2 |
|---|
| Case Size | 45 mm | 49 mm |
|---|---|---|
| Case Shape | Round | Rectangular |
| Case Details | Gunmetal | Titanium |
| Crown Type | - | Digital with haptic feedback |
| BAND | ASUS ZenWatch 3 WI503Q | Apple Watch Ultra 2 |
|---|
| Band Type | Band | Alpine Loop |
|---|---|---|
| Band Size | - | S |
| Band Width | 22 mm | - |
| Fits Wrist with Circumference | - | 130-160 mm |
| Changeable | Yes | Yes |
| Clasp Type | - | G-hook |
| Band Material | Leather | Textile |
| Band Colour | Dark brown | Blue | Indigo | Olive | Orange/beige | Green/gray | Blue/black | Orange | White |
| STORAGE | ASUS ZenWatch 3 WI503Q | Apple Watch Ultra 2 |
|---|
| Storage Capacity | 4 GB | 64 GB |
|---|
| RAM | ASUS ZenWatch 3 WI503Q | Apple Watch Ultra 2 |
|---|
| RAM Size | 512 MB | - |
|---|
| CPU | ASUS ZenWatch 3 WI503Q | Apple Watch Ultra 2 |
|---|
| Manufacturer | Qualcomm | Apple |
|---|---|---|
| CPU Type | Snapdragon Wear 2100 | S9 SiP |
| Features | - | W3 Apple wireless chip, second-generation Ultra Wideband chip, 4-core Neural Engine |
| BATTERY | ASUS ZenWatch 3 WI503Q | Apple Watch Ultra 2 |
|---|
| Technology | Lithium polymer | Lithium Ion |
|---|---|---|
| Capacity | 340 mAh | - |
| Battery Life | - | 36 hours |
| Battery Life Details | - | Normal use - up to 36 hour(s) Low power mode - up to 18 hour(s) Power saving mode - up to 72 hour(s) |
| Rechargeable Battery | - | Yes |
| Wireless Charging | - | Yes |
| MISCELLANEOUS | ASUS ZenWatch 3 WI503Q | Apple Watch Ultra 2 |
|---|
| Included Accessories | Power adapter, magnetic charging cable | Magnetic fast charger to USB-C cable (1 m) |
|---|---|---|
| Preloaded Software | Stopwatch, Alarm, Timer | GymKit, Oceanic+, Depth app |
| Compliant Standards | IP67 | IP6X, BFR-free, PVC-free, Beryllium-free, Mercury-free, MIL-STD-810H, EN13319, Arsenic-free |
| Specific Absorption Rate (SAR) | - | 0.22 W/kg (head) 0.43 W/kg (limb) |
| Carbon Footprint | - | 0 kg carbon emissions |
| Max Depth of Water Resistance | 1 m | 100 m |
| Max Operating Temperature | - | 55 °C |
| Min Operating Temperature | - | -20 °C |
| Manufacturer Model Number | - | A2986 |
| Warranty | 1-year warranty | - |
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