Product Price Heart Rate Monitor Step Counter Calories Burned Sleep Tracking Activity Tracking Battery Life (hours) Waterproof Rating
Whoop Whoop 4.0 (with monthly membership)
US
£22.14 Yes (accelerometer-based step tracking) Yes (strain and saved activities with heart rate zones) 4 to 5 days Water resistant up to 10 meters for 2 hours

WHOOP 4.0 is a screen-free wearable focused on 24/7 biometric monitoring including continuous heart rate, HRV, sleep, steps, and strain with app-based personalized insights; it uses on-wrist charging and removable battery packs and requires a membership. It suits athletes and committed users who want deep recovery and sleep analytics without smartwatch distractions.

★ Ideal for

Best for minimizing charging frequency compared with earlier WHOOP models because it offers 4 to 5 days battery life (reducing charging to roughly twice per week).

Hume Band 2.0
US
£183.73 Yes Yes Activity levels, movement patterns, strain, and recovery Up to 14 days IP68; water-resistant up to 1 meter for up to 2 hours

The Hume Band 2.0 is a screenless health and longevity tracker that monitors heart rate, sleep, activity, calories, recovery, and other biomarkers. It suits people who want discreet, continuous wellness tracking and personalized health insights without a smartwatch display.

★ Ideal for

It suits users prioritizing battery life because its claimed battery lasts up to 14 days on one charge, reducing charging frequency during continuous sleep and activity tracking.

Mibro GS Explorer S
US
£118.05 Yes Yes 150+ sports modes Up to 20 days daily use, up to 60 days standby, up to 25 hours GPS 10ATM

The Mibro GS Explorer S is a rugged smartwatch with heart rate, sleep, activity, calorie and step tracking, dual-frequency GPS, and support for more than 150 sports modes. Its 10ATM water resistance and long battery life make it well suited to outdoor enthusiasts, swimmers, divers and active users who want a durable all-purpose fitness watch.

★ Ideal for

It suits users seeking the best battery life to minimize charging because it lasts up to 20 days with daily use, up to 60 days on standby, and up to 25 hours with GPS tracking.

Mibro GS Pro2
US
£81.16 Steps Calorie estimates 150+ sports modes, GPS and activity metrics Up to 20 days daily use, 50 days standby, 20 hours GPS mode 5ATM

The Mibro GS Pro2 is a sports smartwatch with continuous health monitoring, 150+ sports modes, dual-frequency GNSS, padel analysis and swim tracking. It suits runners, outdoor enthusiasts, swimmers, padel players and fitness users who want extensive tracking without frequent charging.

★ Ideal for

It suits users seeking the best battery life because it lasts up to 20 days in daily use, up to 50 days on standby and up to 20 hours in GPS mode, minimizing charging frequency.