Fitbit Charge 4 Fitness Band Review

The Fitbit Charge has brought many great fitness bracelets to market since its debut in 2014. The fourth model is the Fitbit Charge 4, which has all the advantages of the Charge series, plus GPS for scheduling training routes, Spotify support, more sleep control tools, and a new motivating feature for tracking active-zone minutes.

And also, in Charge 4, there is Fitbit Pay, which is available not only to owners of the more expensive version of The Special Edition. But, there is still not enough color display.

Fitbit Charge 4 features

Display1 inch, 160×100 pixels, touchscreen
Battery autonomyUp to 7 days; Up to 5 hours using GPS
Water tightnessUp to 50 meters (not recommended to wear in a hot tub or sauna)
MaterialsPlastic case and stainless steel strap
Operating TemperatureFrom -4 to 140 degrees F
SensorsOptical heart rate (accuracy depends on the physiology and location of the device); GPS; NFC; altimeter
Contactless paymentFitbit Pay
Other possibilitiesControl music via Bluetooth LE on Android and iOS

Appearance and Display

Appearance and Display

The Fitbit Charge 4 bracelet looks stylish, no more than 1.2 cm thick in the case. The Special Edition version, which is more expensive than usual and is equipped with a woven black strap and an additional flexible plastic for active training, looks excellent. Changing straps is easy – you need to press two small buttons on the back of the fitness tracker.

Like its predecessor, the Charge 4 has a black-and-white touchscreen display with a diagonal of 1 inch. The panel looks a little dated, especially compared to the bright color displays of competitors. In the shadows, you can easily see the screen’s contents, but in the bright sun will have to squint.

To save battery life, the screen shuts down pretty quickly, and to start it. You need to press the button on the left, perform the function “back” while working with the interface, or slightly shake the wrist, or press on the screen itself. Sometimes you have to click a few times, which is a little annoying. In general, the display is the main aspect that Fitbit needs to work on before Charge 5.

You can install one of the many dials for a change, each of which has its own set of display indicators.

Interface and management

The Fitbit Charge 4 interface is simple and concise. After swiping the dial-up on the screen will appear various training information such as the number of steps taken in a day or an hour, current heart rate indicators, burned calories, information about sleep, weight, and more. Swiping to the left, you’ll see built-in apps: Spotify, calendar, timers, alarm clocks, weather, exercises, and settings. Swipe down, and the latest notifications appear.

Charge 4 is better to put tightly on the hand to correctly track the heart rate so that the gadget does not move on the wrist. However, not so tight that it crashes into the skin and interferes with blood circulation. Sometimes the strap should be loosened or removed to allow the wrist to rest.

Tracking body indicators

Tracking body indicators

The new Charge 4 can track steps, distance, floors, burned calories, workout time, and many other parameters. Women will be able to use the Fitbit app to take into account menstrual periods and ovulation.

Thanks to GPS, it is not necessary to take your phone during training on the street – the route and distance traveled will be displayed on your wrist. GPS is configured for seven types of training, including running, walking, cycling, regular exercise, and customizable activities such as surfing or kayaking.

During the runs, the Fitbit Charge 4 will show the distance and pace of movement and the duration of the workout. When you reach the set mark for the number of calories burned or peak activity during cardio training, the device vibrates and displays a motivating notification.

The sports bracelet will provide information about the time of training, the number of kilometers traveled, the average pace, maximum and average heart rate, burned calories, and much more. There is a limitation – you can’t track activity in the background or use another app. That is, until the end of the workout to go to Spotify and switch your music or even open the dial to find out the time – will not work.

The “Exercises” section of the Fitbit app has an intensity map showing the route of your workout and the change in heart rate over time. Another graph shows the change in the pace of running.

Fitbit’s Charge 4 has six pre-installed shortcuts for a quick workout run. These include running, cycling, swimming, walking, walking on the track, and open space. But, you can set up this list as you like, on your own. This is done in the Fitbit app. Among the available options are even boxing, martial arts, and tennis.

Function Active Zone Minutes

The Fitbit Charge 4 is the first device from Fitbit with Active zone Minutes. The feature shows how intense the exercise was, taking into account your age and heart rate at rest. For every minute in the fat-burning zone, you get one minute of Active zone – regardless of the type of workout, and two such units per minute of peak activity in cardio exercises.

Sleep tracking

Charge 4 tracks the amount of time a user spends in a shallow, deep, and fast sleep phase every night. The function was available in the Most Simple Form line initially, but some more advanced tools previously only existed inexpensive models like the Versa 2 smartwatch.

These include the ability to see fast sleep indicators and a mode that reduces the brightness of the display and disables all calls or messages. To view the first feature, swipe the top, and to activate the second, it will take a long click and swipe to the right.

The mode shows the quality and duration of sleep in points, the exposure of which is based on the amount of sleep time in general, in deep and fast phases, at the average heart rate, and how restless the body behaved. As the app explains, during deep sleep, muscles relax and recover when there is a regulation of memory and mood during the phases of fast sleep.

A score above 90 points is great, 80 to 90 is good, 60 to 79 is acceptable, and below 60 is bad. According to Fitbit, most people’s sleep is between 72 and 83 points. For many people, wearing some devices during sleep is uncomfortable, but the compactness of Charge 4 allows the device to remain on the wrist, almost invisible. And even if you slightly loosen the strap, the sensors will not work any worse.

The app will retain a lot of detailed information about your sleep. Charts will show how much time at night you slept or stayed awake, phases, and how the heart rate schedule changed. In addition, it displays the “incoming oxygen” graph, which shows changes in breathing during sleep. The appendix notes that blood oxygen saturation under normal conditions varies a little, but strong deviations indicate problems with breathing.

The Fitbit Charge 4 also has a quiet alarm clock that will wake you up with a soft vibration on your wrist at the right time. This is a great feature for those who sleep not alone or have thin walls in the apartment. The new model also has a feature that was only on the smartwatch from Fitbit – Smart Wake. It uses machine learning to calculate the optimal lift time, taking into account all phases.

Other features

Spotify’s support was a major wish for owners of past Charge models, and in the fourth generation, it appeared. However, to use the service, you need a premium subscription.

In addition, there was support for contactless payments Fitbit Pay for any version, as in Charge 3, the payment system was available only to The Owners of Special Edition. It should be noted that stores will only see the device’s identification number, not your card number – this is additional protection to guarantee the security of the transaction.

The Fitbit Charge 4 sports bracelet shows notifications from your phone about incoming calls, messages, and notes in your calendar. If you’re using an Android device, you’ll get a quick response from your wrist. Unfortunately, iPhone owners don’t have this feature because of the iOS architecture. You can set up notifications from other apps, which is done in the Fitbit app.

Fitbit Charge 4 autonomy and waterproof

According to Fitbit, 100% of the Charge 4 battery lasts for seven days – or five hours with GPS turned on. For a day of work without a GPS device will sit only 15%. During a track-tracking workout, the battery will discharge much faster, but that’s fine.

With Charge 4, you can dive into the water – more precisely, go to the shower. However, Fitbit is then advised to dry the device to avoid skin irritation and rub the wrist and wrist regularly, especially after training.

Pros And Corns Of Fitbit Charge 4

Pros Corns
Built-in GPSBasic interface
Spotify supportNot enough color display
Strong designScreen Awakening Doesn’t Always Work
Functional app
More sleep tracking tools
Fitbit Pay is available on all models
Motivation metric after minutes in the active zone


Suppose you’re looking for a device to track activity during workouts, daily activities, or sleep. The Fitbit Charge 4 fitness bracelet is doing a great job. I would like to have a better display, but Charge 4 has a strong design, hardy battery, and protection from water.

This model is between the Inspire HR fitness tracker and the Versa 2 smartwatch in the Fitbit range. With the addition of GPS, Spotify, Fitbit Pay, and sleep tracking tools Charge 4 can be considered one of the best fitness band to date that is definitely worth buying.

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