It does the basics (and a little more) - Fitbit Flex 2
It does the basics (and a little more) - Fitbit Flex 2
The Flex 2 tracks steps, distance, calories burned, active minutes and sleep. There's no heart rate sensor, and it doesn't measure floors climbed.
There's also no display. Instead of a clock or a screen, the Flex 2 uses vibration and five tiny LED lights to show you how close you are to reaching your daily step goal and alert you to incoming calls and texts. The Flex 2 can serve up get-up-and move reminders just like the Fitbit Alta, the Charge 2 and the Blaze, which makes you walk 250 steps to "win" the hour, but on the Flex 2 these reminders become buzzes and cryptic flashing colored lights. End result: not as motivating, somehow.

The different LED colors were confusing. The bracelet buzzes and flashes blue. Should I get up and move? Oh wait, now it's blinking red. Does that mean I have a text message, or did I just beat my step goal? Most people won't have a decoder ring handy.
In other words, it was easy to forget what each light meant. (For the record, blue means you have a call or text message, red is to get up and move, and all the lights glow when you reach 10,000 steps.)
https://www.cnet.com/
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