Fitbit offers several devices in the activity tracking market, from the plain and simple Flex to its GPS sportswatch, known to friends as Surge.

Rumour has it the company will be adding another couple of devices to its line-up before the end of the year however, with talk of a Flex successor as well as a Charge HR successor.

We’ve compared the rumoured Charge 2 to the Charge and Charge HR to see how the devices differ, based on the speculation.

Fitbit Charge 2 vs Charge HR vs Charge: Design

The Fitbit Charge and Charge HR both measure 21mm wide and they both come with a small OLED display and a textured, elastomer band. There is a small button on the left-hand side of the display, they both come in several colour options and they are both water resistant up to 1ATM but neither are swim proof.
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https://www.pocket-lint.com/fitness-trackers/buyers-guides/fitbit/138560-fitbit-charge-3-vs-charge-2-vs-charge-hr-what-s-the-difference