Fitbit Charge 5 Specifications

Fitbit Charge 5 Specifications

In August 2021, a new Fitbit Charge 5 fitness watch hit the market with better features over the previous Charge 4. Some swimmers call it the best Fitbit. It has a nonstop heart rate tracker, and it's water-resistant for swimming in pools. 


Like the Fitbit Luxe, released earlier this year, the Charge 5 has a small but bright color AMOLED display. This is a big upgrade from the black and white display of the Charge 4, which looked dated when compared with cheaper fitness trackers like the Huawei Band 3 Pro and Xiaomi Mi Smart Band 5.

The Charge 5 also has an ambient light sensor, which allows the screen to lighten and darken to suit the current lighting conditions, plus an always-on mode that makes it easier to check your stats at a glance during a workout.


The Fitbit Charge 5 has the same EDA sensor as the Fitbit Sense, allowing you to track changes in stress levels (Image credit: Fitbit)

Fitness tracking

Like the Fitbit Charge 4, the Charge 5 has a range of workout tracking modes, plus on-board GPS for monitoring your runs, bike rides and walks without the need to carry your phone.

One new feature (which is also coming to other Fitbit devices soon) is your personal Readiness Score. This is based on your heart rate variability, activity level, and sleep quality – and is only available to Fitbit Premium subscribers.

You'll receive a score each morning, along with activity suggestions for the day. If you're well rested, the Fitbit app may suggest you try an intense workout, and if you're tired it may present you with some gentle yoga to try instead, with recommendations from the vast archive of instructor-led programs available in the Fitbit app.

The Fitbit Charge 5's new Readiness Score will help you see whether you're well rested enough for a tough workout (Image credit: Fitbit)

ECG app

Like the Fitbit Sense, the Fitbit Charge 5 has an ECG (electrocardiogram) sensor and app, which you can use to check for signs of atrial fibrillation (an irregular heart rhythm). This can be an early sign of heart disease – which is often known as 'the silent killer' due to its lack of early symptoms.

After you take an ECG reading the Fitbit app will generate a report that you can share with your doctor if you have any concerns.

Stress monitoring

Another feature the Fitbit Charge 5 borrows from the Fitbit Sense is an EDA (electrodermal activity) sensor, which monitors changes in your skin's conductivity as a response to stress. More EDA responses correspond with higher stress levels, and after taking a reading, you'll be prompted to add details of anything that might have affected your mood in the Fitbit app.

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