Product Price Heart Rate Monitor GPS Waterproof Rating (IPX) Battery Life (hours) Screen Size (inches) Activity Tracking
Whoop Band 5.0
US
£148.69 Water resistant to 32.8 feet 14+ days Steps, sleep stages, calories, VO2 Max, strain/recovery monitoring

WHOOP Band 5.0 is a screenless wearable focused on continuous heart monitoring, sleep, recovery, and long-term health metrics with 14+ day battery life. It suits athletes and users who want detailed biometric coaching and 24/7 physiological tracking rather than a smartwatch-style display.

Suunto Vertical 2
US
£447.57 100 m All-Systems GNSS up to 65h; Smartwatch up to 20 days; Standby up to 40 days; Power saving up to 250h 1.5 in Step counter, calories, activity targets, activity history, sleep tracking, HRV, 115+ sport modes

The Suunto Vertical 2 is an adventure-focused GPS smartwatch with a bright 1.5 in AMOLED, long multi-mode battery life, dual-band GNSS and integrated wrist heart rate. It includes offline maps, an LED flashlight and extensive activity and sleep tracking, suited for endurance athletes and outdoor adventurers.

Polar Vantage V3
US
£523.03 WR50 Up to 140 hours (training) / 10 days smartwatch mode 1.39 in +150 sport profiles, swim tracking, sleep, SpO2, skin temperature

Premium multisport GPS watch with dual-frequency GNSS, advanced optical heart-rate and wrist ECG, AMOLED touchscreen and offline maps. Suits serious runners and multisport athletes who want detailed training, navigation and recovery metrics.

Garmin Forerunner 970
US
£560.39 5 ATM Up to 15 days smartwatch mode; up to 26 hours GPS mode 1.4 in Yes

The Forerunner 970 is a premium multisport GPS smartwatch with AMOLED touchscreen, multi-band GPS, advanced optical heart-rate and extensive training metrics for runners and triathletes. It suits endurance athletes and serious trainers who want detailed physiology, mapping, and long battery life.

Apple Watch Ultra 3
US
£597.01 100 meters (ISO 22810:2010) Multiday (up to 72 hours in low-power modes) 49 mm case with 514 x 422 pixels Advanced workout metrics, Custom Workouts, sleep tracking, running and workout companion

Apple Watch Ultra 3 is a rugged titanium GPS + cellular smartwatch with a large, bright Always‑On Retina display, multiday battery life, dual-frequency GPS and advanced health sensors. It's aimed at outdoor adventurers, athletes, and users who want extended battery and robust safety features.

COROS Apex 4
US
£321.29 WR50 65 hrs (46mm) or 41 hrs (42mm) 1.3 in (46mm) or 1.2 in (42mm) HRV, sleep, SpO2, training load, running, cycling, climbing, skiing, strength workouts

A rugged mountain-focused GPS watch with dual-frequency GPS, advanced mapping, long battery life, and a titanium bezel with sapphire glass. Suited for trail runners, climbers, and endurance athletes who need precise navigation and extended GPS runtime.

Garmin Enduro 3
US
£560.39 10 ATM Up to 36 days smartwatch mode; up to 120 hours GPS-only; up to 320 hours GPS with solar 1.4 in All-day activity tracking, sleep, Pulse Ox, HRV, VO2 max, training load, recovery (multiple sport profiles)

Enduro 3 is an ultraperformance solar GPS smartwatch built for multi-day endurance with exceptional battery life, advanced navigation and comprehensive health metrics. It suits ultra-runners, thru-hikers and outdoor athletes who prioritise battery longevity and ruggedness over flashy AMOLED displays.