Fitbit is updating two of its most popular activity trackers with new models sporting additional features, improved software, and… the number 2 in their names.

The $150 Fitbit Charge 2 is an update to the company’s Charge and Charge HR. It features a 1.5 inch display and a heart rate monitor.

The $100 Fitbit Flex 2 is an updated wrist band with a thinner design and improved water resistance. Fitbit says it’s the first “swim proof” model in the company’s lineup, and it includes support for swim tracking.

fitbit 2

Fitbit’s Charge 2 is an activity tracker that could be mistaken for a watch, thanks to its 1.5 inch OLED touchscreen display and support for interchangeable bands that ocme in a range of colors.

But it’s an activity tracker first and foremost, with support for step counting and sleep tracking, a heart rate sensor, and GPS for tracking your runs and other activities (when paired with a phone for GPS functionality). Fitbit says the Charge 2’s rechargeable battery should last for up to 5 days at a time.

When paired with your phone, the Charge 2 does have a few smartwatch-like features including support for displaying notifications about incoming calls and text messages and calendar alerts.

The Flex 2 is a more compact device with 5 LED lights rather than a display. It’s also 30 percent thinner than the original Fitbit Flex and water resistant up to 50 meters (about 164 feet).

The lights give you an idea of your progress toward your goals at a glance, but you’ll need to fire up a smartphone app to see more details.

This model also supports up to 5 days of battery life and the tracker unit can be removed from  the band and used with interchangeable bands or used as a bangle pendant that can hang from a necklace, bracelet, or other accessory.

While there’s no display to show you alerts from your phone, the Flex 2 can vibrate when a phone call or text message comes into your phone. It can also send you reminders to get moving if you’ve been sitting still for an hour or longer.

 

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