Xiaomi Smart Band 8 vs Xiaomi Watch S4
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At a glance
Key specifications and important differences. Full details follow below.
| Feature |  Xiaomi Smart Band 8 |  Xiaomi Watch S4 |
|---|---|---|
| Price | KSh 6,500.00 | KSh 20,000.00 |
| Display | 1.62-inch AMOLED touchscreen | 1.43-inch AMOLED, 60 Hz |
| Battery capacity | 190 mAh | 486 mAh |
| Water resistance | 5 ATM rated for suitable shallow-water activities | 5 ATM rated for suitable shallow-water activities |
| Positioning / GPS | — | Built-in GPS, Galileo, GLONASS, BeiDou and QZSS |
| Health & wellness features | Heart rate, blood oxygen, stress, cycle and activity tracking; wellness data is not intended for medical diagnosis | Heart rate, blood oxygen, stress, breathing and activity tracking; wellness data is not intended for medical diagnosis |
| Sleep tracking | Sleep monitoring supported | Sleep monitoring supported |
| Sports / workout modes | More than 150 fitness modes | More than 150 sports modes |
| Phone compatibility | Android 6.0 or later; iOS 12.0 or later | Android 8.0 or later; iOS 14.0 or later |
Full specifications
2 of 4 products
| Specification | Xiaomi Smart Band 8 | Xiaomi Watch S4 |
|---|---|---|
| Identity & design | ||
| Brand | Xiaomi | Xiaomi |
| Model | Xiaomi Smart Band 8 | Xiaomi Watch S4 |
| Announced | April 2023 | March 2025 (global model) |
| Dimensions | 48 × 22.5 × 10.99 mm (strap and protrusions excluded) | 47.3 × 47.3 × 12.0 mm (strap and protrusions excluded) |
| Weight | 27 g with included strap | Approximately 44.5 g (strap excluded) |
| Build materials | Reinforced 2.5D glass case with AF coating and TPU strap | Aluminum-alloy frame with interchangeable bezel |
| Wrist size | 135–210 mm | Black/Silver: approximately 140–210 mm; Rainbow: approximately 135–210 mm |
| Strap / band | TPU strap | Fluororubber; Rainbow configuration also includes nylon strap |
| Controls / buttons | AMOLED touchscreen | Rotating crown, side control, interchangeable bezel interaction, and touchscreen |
| Display | ||
| Display | 1.62-inch AMOLED touchscreen | 1.43-inch AMOLED, 60 Hz |
| Screen resolution | 192 × 490 pixels | 466 × 466 pixels (~326 ppi) |
| Display features | Adjustable brightness up to 600 nits; always-on display supported | Always-on display; up to 1,500 nits HBM |
| Memory & software | ||
| Operating system | — | Xiaomi HyperOS 2 |
| Connectivity | ||
| Bluetooth | Bluetooth 5.1 Low Energy | Bluetooth 5.3 |
| NFC | — | Supported; availability varies by region |
| Positioning / GNSS | — | Built-in GPS, Galileo, GLONASS, BeiDou and QZSS |
| Health & fitness | ||
| Sensors | High-precision 6-axis motion sensor, PPG heart-rate sensor, and ambient-light sensor | Heart-rate/blood-oxygen sensor, accelerometer, gyroscope, ambient-light sensor, electronic compass, barometer and Hall sensor |
| Health & wellness features | Heart rate, blood oxygen, stress, cycle and activity tracking; wellness data is not intended for medical diagnosis | Heart rate, blood oxygen, stress, breathing and activity tracking; wellness data is not intended for medical diagnosis |
| Sleep tracking | Sleep monitoring supported | Sleep monitoring supported |
| Sports / workout modes | More than 150 fitness modes | More than 150 sports modes |
| Smart features | ||
| Speaker | — | Built-in speaker |
| Microphone | — | Two built-in microphones |
| Battery & durability | ||
| Battery capacity | 190 mAh | 486 mAh |
| Battery life | At least 16 days typical use; actual life varies by settings and use | Up to 15 days typical use; actual life varies by settings and use |
| Charging | Magnetic charging; approximately 1 hour | 2-pin magnetic charging dock |
| Water resistance | 5 ATM rated for suitable shallow-water activities | 5 ATM rated for suitable shallow-water activities |
| Compatibility | ||
| Phone compatibility | Android 6.0 or later; iOS 12.0 or later | Android 8.0 or later; iOS 14.0 or later |
| Companion app | Mi Fitness | Mi Fitness |
| Colors | Gold or Graphite Black capsule; strap colors vary by market | Black, Silver, or Rainbow depending on configuration |
| Additional specifications | ||
| Calling | — | Bluetooth calling when paired with a compatible phone; third-party app voice calls not supported |
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