Outside of optimizing health and fitness, the Charge 4 has practical advantages throughout the day, such as delivering smartphone alerts and notifications, playing music via Spotify, or paying for items with Fitbit Pay. It can track your time in light, deep, and REM stages to provide you with a nightly sleep score. Water-resistant wireless trainer for iOS & Android smartphones (S and L. Even when you’re asleep the Charge 4 is working. Buy Fitness tracker FitBit Charge 4 Purple (FB417BYBY) on LDLC, high-tech expert. 1 Set up Charge 4 Turn on and charge your device. Based on your age and resting heart rate, it can tell you when you’re in the fat-burning, cardio, or peak heart rate zones. Fitbit Charge 4 helps you take your goals further with built-in GPS, personalized heart-rate zones, Active Zone Minutes, up to 7 days of battery life, and more. Tap to pay and make secure purchases at transit stations, retail stores and more.Working hand-in-hand with your fitness tracking is the built-in 24/7 heart rate monitor, which can track calorie burn and let you know when you’re in personalized heart rate zones.Plus, send quick replies to texts (Android only).

Get call, text and smartphone app notifications on your wrist.

Water resistant to 50M so you can track swims, wear in the shower and more.

Easily visualise your heart rate zones after outdoor workouts with a workout intensity map in the Fitbit app.

Track sleep stages & review your in-app Sleep Score for an easy way to see how well you slept.

Track workouts in real-time with 20 goal-based exercise modes.

Multi-day battery lasts up to 7 days and up to 5 hours when using built-in GPS.

Use 24/7 heart rate to track resting heart rate & better measure calorie burn.

Get a breakdown of your Active Zone Minutes to track your progress against the recommended amount.^ Fitbit Charge 4 Fitness Tracker Black/Black Move forward with a health & fitness tracker that packs built-in GPS for pace and distance, 24/7 heart rate.

Use built-in GPS to see your pace and distance on screen during outdoor runs, cycles, hikes and more.

Plus, with Fitbit Pay and up to 7-day battery, you get more convenience on the go and more inspiration to reach your fitness goals.* This sleek, swim proof tracker is packed with features that help you know your workouts and your body better - like built-in GPS, Active Zone Minutes, new exercise modes and sleep tracking. With Fitbit Charge 4, theres no limit to how far you can go.

Charge 4 fitbit