WHOOP 4.0 Sensor vs Apple Watch SE 3
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At a glance
Key specifications and important differences. Full details follow below.
| Feature | WHOOP 4.0 Sensor | Apple Watch SE 3 |
|---|---|---|
| Price | KSh 36,000.00 | Price range: KSh 35,500.00 through KSh 39,500.00 |
| Display | — | Always-On Retina LTPO OLED 44 mm: 977 mm² display area 40 mm: 759 mm² display area |
| Water resistance | IP68; water-resistant up to 10 m for 2 hours; swimming and showering supported, not diving | Water resistant to 50 m under ISO 22810:2010 |
| Processor | — | Apple S10 SiP |
| Storage | — | 64 GB |
| Operating system | — | watchOS |
| Network / cellular | — | GPS + Cellular models support LTE and UMTS; availability varies by carrier and region |
| Positioning / GNSS | — | L1 GPS, GLONASS, Galileo and QZSS |
| Health & wellness features | Continuous heart rate, HRV, respiratory rate, skin-temperature variation, strain and recovery tracking; not a medical device | High and low heart-rate notifications; irregular rhythm notifications; temperature sensing; cycle tracking; mindfulness and medications apps |
Full specifications
2 of 4 products
| Specification | WHOOP 4.0 Sensor | Apple Watch SE 3 |
|---|---|---|
| Identity & design | ||
| Brand | WHOOP | Apple |
| Model | WHOOP 4.0 sensor | Apple Watch SE 3 |
| Announced | — | September 2025 |
| Dimensions | — | 44 mm: 44 × 38 × 10.7 mm 40 mm: 40 × 34 × 10.7 mm |
| Weight | — | 44 mm: 32.9 g (GPS), 33.0 g (GPS + Cellular) 40 mm: 26.3 g (GPS), 26.4 g (GPS + Cellular) |
| Build materials | Screen-free continuous-wear sensor housing | Aluminium case |
| Wrist size | — | 44 mm: 140–245 mm wrist 40 mm: 130–200 mm wrist |
| Controls / buttons | — | Digital Crown with haptic feedback; side button; touchscreen |
| Display | ||
| Display | — | Always-On Retina LTPO OLED 44 mm: 977 mm² display area 40 mm: 759 mm² display area |
| Screen resolution | — | 44 mm: 368 × 448 pixels 40 mm: 324 × 394 pixels |
| Display protection | — | Ion-X front glass |
| Display features | — | Always-On display; up to 1,000 nits; 326 ppi |
| Performance & software | ||
| Processor | — | Apple S10 SiP |
| CPU | — | 64-bit dual-core processor; 4-core Neural Engine |
| Storage | — | 64 GB |
| Operating system | — | watchOS |
| Connectivity | ||
| Network / cellular | — | GPS + Cellular models support LTE and UMTS; availability varies by carrier and region |
| SIM / eSIM | — | eSIM on GPS + Cellular models; carrier plan required |
| Wi-Fi | — | Wi‑Fi 4 (802.11n), 2.4 GHz |
| Bluetooth | — | Bluetooth 5.3 |
| NFC | — | NFC with Apple Pay support |
| Positioning / GNSS | — | L1 GPS, GLONASS, Galileo and QZSS |
| Audio & communication | ||
| Speaker | — | Speaker |
| Microphone | — | Microphone |
| Calling | — | Bluetooth calling through a paired iPhone; cellular calling on GPS + Cellular models with an eligible plan |
| Sensors, health & fitness | ||
| Sensors | Photoplethysmography sensors and skin-temperature sensing | Second-generation optical heart sensor; temperature sensor; compass; always-on altimeter; high-g accelerometer; high-dynamic-range gyroscope; ambient light sensor |
| Health & wellness features | Continuous heart rate, HRV, respiratory rate, skin-temperature variation, strain and recovery tracking; not a medical device | High and low heart-rate notifications; irregular rhythm notifications; temperature sensing; cycle tracking; mindfulness and medications apps |
| Sleep tracking | Automatic sleep detection, sleep duration, stages, sleep need and sleep performance | Sleep tracking with sleep stages and sleep score |
| Sports / workout modes | Automatic and manual activity tracking | Workout app with multiple workout types and automatic workout detection |
| Training & outdoor features | — | Pace and heart-rate zones; compass waypoints and backtrack |
| Safety & emergency features | — | Emergency SOS; international emergency calling; fall detection; crash detection; check in |
| Battery & durability | ||
| Battery life | Approximately 5 days | Up to 18 hours normal use; up to 32 hours in Low Power Mode |
| Charging | WHOOP 4.0 slide-on wireless Battery Pack for on-wrist charging | Fast charging |
| Water resistance | IP68; water-resistant up to 10 m for 2 hours; swimming and showering supported, not diving | Water resistant to 50 m under ISO 22810:2010 |
| Compatibility | ||
| Phone compatibility | Compatible iPhone or Android phone; current support recommends iOS 18+ or Android 10+ | Requires iPhone 11 or later with iOS 26 or later |
| Companion app | WHOOP app | Apple Watch app and Apple Health |
| Colors | — | Starlight; Midnight |
| Additional specifications | ||
| Charging time | Approximately 150 minutes for the sensor; around 2 hours for the Battery Pack | — |
| Movement sensors | Accelerometer | — |
| Bluetooth and Wi-Fi | Bluetooth 4.2 or higher | — |
| Packing list | WHOOP 4.0 sensor, compatible band and WHOOP 4.0 Battery Pack | — |
| Smart recognition | Automatically recognizes 45 activity types | — |
| Energy, load and readiness features | Recovery, Strain and Sleep scores with personalized coaching | — |
| strap material | SuperKnit performance band | — |
| armband | WHOOP 4.0 band; not compatible with WHOOP 5.0 or MG | — |
| heart rate broadcast | Real-time heart-rate broadcast supported | — |



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