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- Xiaomi Watch S4 15th Anniversary Edition vs Apple Watch Ultra 2
Xiaomi Watch S4 15th Anniversary Edition vs Apple Watch Ultra 2 comparison
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| key specs | ||||
| Display Size | 36mm | 49mm | ||
| Compatible OS | Android 8.0 or above, iOS 12.0 or above | iOS | ||
| Dial Shape | Round | Rectangle | ||
| Display Type | AMOLED | OLED Retina | ||
| Ideal For | Unisex | Unisex | ||
| general | ||||
| Brand | Xiaomi | Apple | ||
| Model | Watch S4 15th Anniversary Edition | Watch Ultra 2 | ||
| Release date | May 23, 2025 | September 12, 2023 | ||
| Model Name | Xiaomi Watch S4 15th Anniversary Edition | Watch Ultra 2 | ||
| Dial Colour | Black | - | ||
| Dial Shape | Round | Rectangle | ||
| Size | Regular | Large | ||
| Touchscreen | 1.43 | Yes | ||
| Interchangeable Strap | Yes | - | ||
| Water Resistant | 5 ATM | Yes | ||
| Usage | Regular | Fitness & Outdoor | ||
| Ideal For | Unisex | Unisex | ||
| Water Resistance Depth | - | 100m | ||
| dimensions | ||||
| Width | 47.3 | - | ||
| Height | 47.3 | - | ||
| Thickness | 12 | - | ||
| Weight (g) | 44.50 | - | ||
| product details | ||||
| Sensor | Heart Rate Monitor, Stress, Sleep | Compass, Always-On Altimeter, heart rate sensor, Accelerometer, Gyroscope, and Ambient light sensor | ||
| Compatible Device | Android and iOS | iOS | ||
| Battery Type | 486mAh | Lithium Ion | ||
| Maximum Operating Altitude | - | 9000 | ||
| Notification | - | Yes | ||
| Battery Life | - | 36 Hours | ||
| Rechargeable Battery | - | Yes | ||
| connectivity features | ||||
| Bluetooth | Yes | Yes | ||
| Bluetooth Version | 5.3 | - | ||
| Wi-Fi | Yes | Yes | ||
| GPS | Yes | Yes | ||
| Other Connectivity Features | NFC, Galileo, Glonass, Beidou, QZSS | Emergency SOS | ||
| Call Function | - | Yes | ||
| Call Features | - | International Emergency Calling | ||
| platform and storage features | ||||
| Operating System | HyperOS 2 | watchOS 10 | ||
| Compatible Operating System | Android 8.0 or above, iOS 12.0 or above | iOS | ||
| Processor Name | - | S9 SiP | ||
| camera and display features | ||||
| Display Resolution | 466 x 466 | - | ||
| Display Size | 36mm | 49mm | ||
| Display Type | AMOLED | OLED Retina | ||
| Backlight Display | - | Yes | ||
| Other Display Features | - | LTPO OLED Always-On Retina display | ||
| fitness and watch functions | ||||
| Step Count | Yes | Yes | ||
| Calorie Count | Yes | Yes | ||
| Heart Rate Monitor | Yes | Yes | ||
| Alarm Clock | Yes | Yes | ||
| Date & Time Display | Yes | Yes | ||
| Language | English | English | ||
| Altimeter | - | Yes | ||
| Compass | - | Yes | ||
| Calendar | - | Yes | ||
| Other Fitness Features | - | Blood Oxgen Sensor, ECG sensor | ||
| audio and video features | ||||
| Speaker | - | Yes | ||
| Microphone | - | Yes | ||
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