Of course, there's also a range of alternate bands that can be purchased separately. The Special Edition version of the Charge 4 also comes with an additional reflective woven nylon band which looks and feels very nice indeed. Inside the pack, Fitbit has again bundled both small and large-sized silicone wrist bands, which no doubt make life easier for retailers, but also for those who might want to share the tracker with a partner or child.
Still, from sheer real estate, the web app gives access to a much broader suite of statistics and interactive graphs to demonstrate the progression of your fitness. For everyday information, they're great a displaying the most pressing vital stats. As with all models, these are well designed and basically faultless in operation. However, they do get upgraded from time to time.
The relatively new SpO2 sensor also returns, which provides an estimate of the amount of oxygen in the blood and works in conjunction with heart rate tracking to provide an illustration of fitness health through the Active Zone Minutes feature which is new to Charge 4 and aims to engage users to engage in more vigorous fitness activities.Īs is typical for Fitbit, the onboard OS is buttery-smooth and responsive with the larger display, making navigating much easier than with predecessors, and the Android and iOS apps remain essentially the same. Fitbit's heart rate tracking abilities are for their form factor very good and as accurate as a watch-style device allows.
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