| key specs |
| Display Size | 42mm | 36mm |
| Compatible OS | iOS 26 | Android 8.0 or above, iOS 12.0 or above |
| Dial Shape | Square | Round |
| Display Type | OLED Retina | AMOLED |
| Ideal For | Unisex | Unisex |
| general |
| Brand | Apple | Xiaomi |
| Model | Watch Series 11 | Watch S4 15th Anniversary Edition |
| Release date | September 9, 2025 | May 23, 2025 |
| Model Name | Watch Series 11 | Xiaomi Watch S4 15th Anniversary Edition |
| Dial Colour | Rose Gold, Silver, Space Grey, Jet Black, Gold, Natural, Slate | Black |
| Dial Shape | Square | Round |
| Size | Regular | Regular |
| Touchscreen | Yes | 1.43 |
| Interchangeable Strap | Yes | Yes |
| Water Resistant | WR50 | 5 ATM |
| Water Resistance Depth | 50 | - |
| Dial Material | Aluminum | - |
| Ideal For | Unisex | Unisex |
| Usage | - | Regular |
| dimensions |
| Width | 36 | 47.3 |
| Height | 42 | 47.3 |
| Thickness | 9.7 | 12 |
| Weight (g) | 30.30 | 44.50 |
| product details |
| Compatible Device | iPhone 11 and above | Android and iOS |
| Battery Life | Up to 24 hours | - |
| Charger Type | Wireless | - |
| Sensor | - | Heart Rate Monitor, Stress, Sleep |
| Battery Type | - | 486mAh |
| connectivity features |
| Call Function | Yes | - |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.3 | 5.3 |
| Wi-Fi | Yes | Yes |
| GPS | Yes | Yes |
| Messaging Support | Yes | - |
| Other Connectivity Features | - | NFC, Galileo, Glonass, Beidou, QZSS |
| platform and storage features |
| Operating System | watchOS 26 | HyperOS 2 |
| Compatible Operating System | iOS 26 | Android 8.0 or above, iOS 12.0 or above |
| Processor Name | Apple S10 | - |
| Internal Memory | 64GB | - |
| camera and display features |
| Display Size | 42mm | 36mm |
| Display Type | OLED Retina | AMOLED |
| Display Resolution | - | 466 x 466 |
| fitness and watch functions |
| Step Count | Yes | Yes |
| Calorie Count | Yes | Yes |
| Heart Rate Monitor | Yes | Yes |
| Compass | Yes | - |
| Calendar | Yes | - |
| Alarm Clock | Yes | Yes |
| Date & Time Display | Yes | Yes |
| Number of Buttons | 2 | - |
| Language | - | English |
| audio and video features |
| Speaker | Yes | - |
| Gesture Control | Yes | - |
| Microphone | Yes | - |
| Voice Control | Yes | - |