Xiaomi Watch S4 vs OnePlus Watch 3
Verified 2026-10-03
A factual specification comparison between the Xiaomi Watch S4 and the OnePlus Watch 3.
Image: Xiaomi Corporation
Xiaomi · SmartwatchXiaomi Watch S4
- Status
- Released · 2025-02-01
- Announced
- Announced 2025-02-01
- Verification
- Verified
- Last checked
- Checked 2026-10-03
Image: OnePlus Technology
OnePlus · SmartwatchOnePlus Watch 3
- Status
- Released
- Verification
- Verified
- Last checked
- Checked 2026-10-02
Key differences
SpecificationXiaomi Watch S4OnePlus Watch 3
Design & Build
| Specification | Xiaomi Watch S4 | OnePlus Watch 3 |
|---|---|---|
| Water resistance (differs) | 5ATM | IP68, 5ATM; MIL-STD-810H tested |
| Colors (differs) | Silver, Black, Rainbow (bezel and strap kit standard), Dual-Tone Ceramic Blue-gray (special edition) | Emerald Titanium |
| Case dimensions (differs) | 47.3mm x 47.3mm x 12.0mm | 46.6mm (excluding lugs) × 47.6mm × 11.75mm (excluding sensor area) |
Display
| Specification | Xiaomi Watch S4 | OnePlus Watch 3 |
|---|---|---|
| Display (differs) | 1.43-inch AMOLED display with HBM brightness | 1.50-inch LTPO AMOLED, up to 2200 nits peak brightness |
| Peak brightness (nits) (differs) | 1500 | 2200 |
Battery & Charging
| Specification | Xiaomi Watch S4 | OnePlus Watch 3 |
|---|---|---|
| Battery life (differs) | Up to 15 days of typical usage | Power saver mode: up to 16 days; Smart mode: up to 5 days; Heavy use in smart mode: up to 3 days |
Connectivity
| Specification | Xiaomi Watch S4 | OnePlus Watch 3 |
|---|---|---|
| Bluetooth (differs) | Bluetooth 5.3 | Bluetooth 5.2, Bluetooth calling |
| Contactless payments (differs) | NFC supported (availability varies by region) | NFC supported, Google Wallet |
Software
| Specification | Xiaomi Watch S4 | OnePlus Watch 3 |
|---|---|---|
| Operating system at launch (differs) | Xiaomi HyperOS 2 | Wear OS by Google + RTOS (dual-system architecture) |
Security & Sensors
| Specification | Xiaomi Watch S4 | OnePlus Watch 3 |
|---|---|---|
| Health sensors (differs) | Heart rate sensor (with blood oxygen/SpO2 sensor), Accelerometer, Gyroscope, Ambient light sensor, Electronic compass, Barometer sensor, Hall sensor | Wrist temperature sensor, Optical heart rate sensor, Optical pulse oximeter sensor, Geomagnetic sensor, Light sensor, Barometer, Acceleration sensor, Gyroscope sensor |
These are specifications where both devices have a confirmed value and the values differ. A difference is not a judgement that either device is better. Showing 10 of 12 differences; the full specifications below include all of them.
Full specifications
differs · Not disclosed: not published by the manufacturer · —: not recorded
SpecificationXiaomi Watch S4OnePlus Watch 3
Design & Build
4 differences
| Specification | Xiaomi Watch S4 | OnePlus Watch 3 |
|---|---|---|
| Water resistance (differs) | 5ATM | IP68, 5ATM; MIL-STD-810H tested |
| Colors (differs) | Silver, Black, Rainbow (bezel and strap kit standard), Dual-Tone Ceramic Blue-gray (special edition) | Emerald Titanium |
| Weight | Not disclosed | Excluding wrist strap: 49.7 g, Including wrist strap: 81 g |
| Case dimensions (differs) | 47.3mm x 47.3mm x 12.0mm | 46.6mm (excluding lugs) × 47.6mm × 11.75mm (excluding sensor area) |
| Build materials (differs) | Aluminum alloy frame | Titanium bezel (Black or Silver), stainless steel case, sapphire crystal cover glass |
Display
2 differences
| Specification | Xiaomi Watch S4 | OnePlus Watch 3 |
|---|---|---|
| Display (differs) | 1.43-inch AMOLED display with HBM brightness | 1.50-inch LTPO AMOLED, up to 2200 nits peak brightness |
| Peak brightness (nits) (differs) | 1500 | 2200 |
| Resolution | Not disclosed | 466×466 pixels |
Performance
No differences
| Specification | Xiaomi Watch S4 | OnePlus Watch 3 |
|---|---|---|
| Chipset model name | Not disclosed | Snapdragon W5 |
| Chipset | Not disclosed | Qualcomm Snapdragon W5, BES2800BP MCU |
Memory & Storage
No differences
| Specification | Xiaomi Watch S4 | OnePlus Watch 3 |
|---|---|---|
| Storage (GB) | Not disclosed | 32 |
Battery & Charging
1 difference
| Specification | Xiaomi Watch S4 | OnePlus Watch 3 |
|---|---|---|
| Charging time | 2-pin magnetic charging dock; 5 minutes of fast charging delivers 2 days of usage | Not recorded |
| Battery capacity (mAh) | 486 | Not recorded |
| Battery life (differs) | Up to 15 days of typical usage | Power saver mode: up to 16 days; Smart mode: up to 5 days; Heavy use in smart mode: up to 3 days |
Connectivity
3 differences
| Specification | Xiaomi Watch S4 | OnePlus Watch 3 |
|---|---|---|
| Wi-Fi | Not disclosed | Wi-Fi 5GHz/2.4GHz |
| Bluetooth (differs) | Bluetooth 5.3 | Bluetooth 5.2, Bluetooth calling |
| Contactless payments (differs) | NFC supported (availability varies by region) | NFC supported, Google Wallet |
| Positioning (differs) | Dual-frequency GNSS chip: GPS, Galileo, GLONASS, BeiDou, QZSS (5 satellite systems) | Dual-band L1+L5 GPS, GLONASS, Galileo, BeiDou, QZSS |
Software
1 difference
| Specification | Xiaomi Watch S4 | OnePlus Watch 3 |
|---|---|---|
| Operating system at launch (differs) | Xiaomi HyperOS 2 | Wear OS by Google + RTOS (dual-system architecture) |
| Phone compatibility | Requires a Xiaomi smartphone or pad running Xiaomi HyperOS 2 with the Mi Fitness app for full feature support (including Xiaomi Smart Hub) | Not recorded |
Security & Sensors
1 difference
| Specification | Xiaomi Watch S4 | OnePlus Watch 3 |
|---|---|---|
| Health sensors (differs) | Heart rate sensor (with blood oxygen/SpO2 sensor), Accelerometer, Gyroscope, Ambient light sensor, Electronic compass, Barometer sensor, Hall sensor | Wrist temperature sensor, Optical heart rate sensor, Optical pulse oximeter sensor, Geomagnetic sensor, Light sensor, Barometer, Acceleration sensor, Gyroscope sensor |
Terms used on this page (5)
- Nits
- A unit of screen brightness (candela per square metre). Typical, HDR and outdoor peak figures are measured under different conditions.
- IP rating
- Ingress protection under IEC 60529: the first digit rates dust protection, the second water protection, each under the manufacturer's stated test conditions.
- mAh and Wh
- Battery capacity. mAh is charge; Wh also accounts for voltage, so it is the more comparable energy figure across device types.
- LTPO
- A display backplane technology that lets the refresh rate vary, down to low rates to save power.
- MIL-STD-810H
- A US military test standard. Manufacturers choose which of its tests to run, so it does not imply a specific level of durability.
Sources & verification
Xiaomi Watch S4
Verified 2026-10-03- Xiaomi CorporationManufacturer specificationsTier 1
OnePlus Watch 3
Verified 2026-10-02- OnePlus TechnologyManufacturerTier 1
- OnePlus Technology Co., Ltd.Manufacturer specificationsTier 1
- OnePlus Technology Co., Ltd.Manufacturer specificationsTier 1
Tier 1 sources are the manufacturer's own product pages, technical specification sheets, or support documentation. Tier 2 sources are reputable independent technical references, used only for facts that couldn't be confirmed from official documentation.