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#Sleep monitor review seriesRead more: Apple watch series 7 review 2021 As well as showing your own sleep data, the app shows what is typical for your age and gender. Again, this is all plotted on line graphs for analysis, and the Fitbit app shows your sleep data over a 30-day average for a better look at long-term trends. #Sleep monitor review plusSleep is automatically recorded each night, with data showing time spent in light, deep and REM sleep, plus time spent awake. These are plotted on line graphs for closer analysis. ![]() For these, the app shows the duration of the exercise, your average heart rate and calories burnt. It counts your steps, floors climbed, distance walked and calories burnt each day, plus exercise sessions. Once set up, the app works like most other fitness trackers. Pushing the single button on the left side of the charge 4 always takes you back to the previous menu. ![]() Swiping to the sides shows other functions, such as a simple weather forecast app (which pulls data from your phone’s internet connection), Spotify control, timers, and a timed relaxation app. You can also see your weight and how much water you have drunk that day, but this data needs to be added to the app manually. This scrolls through screens of information for steps, activity, heart rate and sleep for the day. The user interface is navigated by swiping at the display. #Sleep monitor review downloadSimply download the free Fitbit app (available for iOS and Android) and follow the instructions to create an account and connect the fitness tracker to your smartphone via Bluetooth. The rear of the charge 4 houses a connection for the clip-on charging dock, and an optical heart rate sensor that takes a measurement every five seconds throughout the day, and every second while exercising. Read more: Fossil gen 6 smartwatch review 2021 However, we appreciate this is further contributing to the great battery life. We also wish the display would stay on for slightly longer, as it dims and then goes off fairly quickly each time it is activated. If you own a smartwatch without an always-on display then you’ll be familiar with this minor frustration. We found the display’s waking up was a little hit-and-miss, with a more pronounced raising of the arm needed to wake it up. Also contributing here is how the display remains off until tapped, or until you raise your wrist, which causes it to light up and show the time.Īt least that’s the intention here. Smartwatch users might be disappointed by the simplicity of the screen, but the greyscale technology helps the Fitbit last up to seven days on one charge. Greyscale instead of colour, this is a simple screen designed to deliver useful information instead of wowing you with HD graphics. Much of the slightly curved glass front is taken up by the display. You’ll quickly forget you are wearing it, and we even found the charge 4 comfy enough to wear at night without being annoying. The all-black case won’t win any awards for its beauty, but it is functional and does the job without taking up much space on the wrist. The strap does not attach using the industry-standard lug bars of a wristwatch, but it can be quickly removed and replaced if you want to give your Fitbit a different look. The charge 4 is light and discreet, slipping beneath a shift cuff or jumper sleeve without drawing attention to itself. It is more compact than a smartwatch or dedicated running watch, but crams into its slim case enough features to fulfil the main duties of both of these devices. To our eyes, the Fitbit charge 4 is the archetypal fitness tracker. Features: Sleep score, stress management, menstrual health tracking, GPS, contactless payments. #Sleep monitor review skinSensors: Heart rate, movement, sleep, skin temperature, GPS, NFC. ![]()
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