Fitness trackers have reached a certain maturity: The new models are evolutionary, not revolutionary. So it's with FitBit's Charge 3, the company's most powerful model during its more elaborate (and expensive) smart watches.
Here's what we like
Single band change
Long battery life
] And what we don't
No music control
Hard to tell the time when you exercise  Poor value compared to other Fitbit trackers
At $ 150 ($ 130 street price), charging 3 offers virtually any feature that a general fitness enthusiast could have, and it joins one of the most popular services there out. But FitBit has reserved some obvious choices for its watches, and Charge 3 doesn't offer enough Alta HR or the new Inspire HR ($ 100 street price) to justify the center.
(almost) all Bells and Whistles
At this point, FitBit has refined its flagship tracker into a mirror gloss, embodying almost all the features you might want short of a full Apple Watch or Android Wear device. It includes a larger, long-lasting black and white OLED screen, 50 meter water resistance, automatic training starts and pauses and sleep detection. The screen is covered by Gorilla Glass (the same things they use on your phone), and below is the now ubiquitous heart rate monitor. The special edition, $ 20 more, is identical to an NFC chip used for FitBit pay.
As a more dedicated device, Charge 3 releases most of the app and organizational features you find in a larger selection design. The interface allows you to manually start and stop exercises and do some basic tasks such as set hours or reminders, and the screen will display messages from your iOS or Android phone (with quick answers to the latter). Other than this, everything is all the time.
And that's okay! It's much smaller than any smartwatch, and the battery has consistently lasted about a week for me, with training hours and sleep tracking every day. I appreciate that I don't have to worry about a battery level on a particular day, and although it included goodies such as height tracking and automatic screen brightness, the device is still small enough that I often forget that I carry it.
But I would like to deal with some of the more esoteric functions, such as guided breathing exercises, for a couple of practical alternatives. Onboard GPS is probably too much to ask for at this point (Charge 3 is dependent on the FitBit app on your phone to track location), but I see no reason why music control cannot be included because it is an important part of many users workout. I suspect that the basic game / pause function has been deliberately omitted to make FitBits more expensive watches more appealing.
Fitness Tracker, Refined
Charge 3 is not as small as any other fitness tracker in the FitBit lineup, but it's extremely light with its aluminum casing. And the fall and lock mechanism has been refined since Charge 2: it sits no more naturally on your wrist and replaces ribbons for something more sporty takes literally seconds.