WHOOP 4.0 Sensor vs Garmin CIRQA Smart Band
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At a glance
Key specifications and important differences. Full details follow below.
| Feature |  WHOOP 4.0 Sensor |  Garmin CIRQA Smart Band |
|---|---|---|
| Price | KSh 36,000.00 | KSh 40,000.00 |
| Battery capacity | — | Lithium ion |
| Water resistance | IP68; water-resistant up to 10 m for 2 hours; swimming and showering supported, not diving | Swim, 5 ATM |
| RAM | — | 128 MB |
| Storage | — | 128 MB |
| Operating system | — | Garmin |
| Positioning / GNSS | — | Available |
| Health & wellness features | Continuous heart rate, HRV, respiratory rate, skin-temperature variation, strain and recovery tracking; not a medical device | Walking, Pilates, Yoga, Indoor Walking, Treadmill Walking, Mobility, Meditation, Breathwork |
Full specifications
2 of 4 products
| Specification | WHOOP 4.0 Sensor | Garmin CIRQA Smart Band |
|---|---|---|
| Identity & design | ||
| Brand | WHOOP | Garmin |
| Model | WHOOP 4.0 sensor | CIRQA |
| Announced | — | August 14, 2026 |
| Dimensions | — | 27 mm x 47 mm x 9 mm |
| Weight | — | Module: 14.8 g Wrist band: S-M, 5.9 g (20.7 g) Wrist band: L-XL, 6.4 g (21.2 g) |
| Build materials | Screen-free continuous-wear sensor housing | fiber-reinforced polymer |
| Wrist size | — | S-M: 120-200 mm L-XL: 145-240 mm |
| Strap / band | — | fabric (ComfortFit bands) |
| Controls / buttons | — | single hardware button |
| Performance & software | ||
| RAM | — | 128 MB |
| Storage | — | 128 MB |
| Operating system | — | Garmin |
| Connectivity | ||
| Bluetooth | — | Bluetooth®, ANT+® |
| Positioning / GNSS | — | Available |
| Sensors, health & fitness | ||
| Sensors | Photoplethysmography sensors and skin-temperature sensing | Optical Heart Rate Sensor (Gen 4) Pulse Oximeter (Pulse Ox / SpO2) Skin Temperature Sensor Accelerometer |
| Health & wellness features | Continuous heart rate, HRV, respiratory rate, skin-temperature variation, strain and recovery tracking; not a medical device | Walking, Pilates, Yoga, Indoor Walking, Treadmill Walking, Mobility, Meditation, Breathwork |
| Sleep tracking | Automatic sleep detection, sleep duration, stages, sleep need and sleep performance | Automatic Detection |
| Sports / workout modes | Automatic and manual activity tracking | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, Dance Fitness, Jump Roping |
| Training & outdoor features | — | Hiking, Bouldering, Indoor Climbing, Mountaineering, Horseback Riding, Golfing (basic support), Disc Golf, Archery |
| Diving / depth features | — | Basic Swimming |
| Battery & durability | ||
| Battery capacity | — | Lithium ion |
| Battery life | Approximately 5 days | Up to 10 days |
| Charging | WHOOP 4.0 slide-on wireless Battery Pack for on-wrist charging | Garmin proprietary plug charger |
| Water resistance | IP68; water-resistant up to 10 m for 2 hours; swimming and showering supported, not diving | Swim, 5 ATM |
| Compatibility | ||
| Phone compatibility | Compatible iPhone or Android phone; current support recommends iOS 18+ or Android 10+ | iPhone (iOS) and Android |
| Companion app | WHOOP app | Garmin Connect app |
| Colors | — | Black, Captain Blue, French Gray, Mauve |
| 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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