Product Price Heart Rate Monitor Step Counter Calories Burned Sleep Tracking Activity Tracking Battery Life (hours) Waterproof Rating
Apple Apple Watch Ultra 3
US
£596.65 Built-in step counter Estimated calories from activity tracking Activity rings, workout detection, custom workouts, heart rate zones Up to 42 hours regular use up to 72 hours Low Power Mode Water resistant to 100 m

The Apple Watch Ultra 3 is a rugged 49mm titanium smartwatch with multiday battery life, advanced health sensors, dual-frequency GPS, and new satellite communications. It suits outdoor athletes, endurance users, and anyone who needs extended battery and robust safety features.

Garmin Fenix 8 (Solar Sapphire)
US
£634.73 Yes (digital 3-axis accelerometer) Yes Yes (multisport activity tracking, preloaded sports apps) 47 MM: Smartwatch up to 21 days or 28 days with solar; 51 MM: Smartwatch up to 30 days or 48 days with solar 100 meters

The Garmin Fenix 8 Solar Sapphire is a premium multisport GPS smartwatch with solar charging, a sapphire lens, advanced health sensors and long battery life suited for serious athletes and outdoor adventurers who need durable navigation and multi-day endurance. It supports extensive activity and sleep tracking and is rated for diving and swimming.

Suunto Race S
US
£260.62 Step counter (24/7) Calories burned (24/7 activity calories) 115+ sport modes, activity targets, activity history, cadence and GPS speed/distance Daily use up to 9 days (HR on), up to 13 days (HR off); Training up to 30h (multi-band), up to 40h (single-band), up to 120h (tour/power saving) 50m

Suunto Race S is a smaller, lighter performance GPS watch with a high-definition AMOLED screen, improved optical heart-rate sensor, HRV recovery metrics, offline maps and extensive sport modes. It suits runners, triathletes and outdoor athletes who want advanced training metrics in a compact form factor.

Whoop Whoop Band 5
US
£178.47 Yes, step tracking available Calories burned tracked Activity monitoring with strain and heart rate zone training 14+ day battery life Water resistant to 32.8 feet

Whoop Band 5 is a screenless wearable focused on 24/7 biometric monitoring including continuous heart rate, sleep staging, recovery and strain analytics. It suits users who want deep recovery and health insights with long battery life and a subscription-based membership.