Fitbit Charge 2 vs Charge HR vs Charge: What’s the rumoured difference?

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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.


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.

The non-removeable strap is fastened with a stainless steel clasp on the Charge HR and two pins on the Charge. The Charge HR also features Fitbit’s PurePulse Heart Rate monitor on its underside, while the Charge doesn’t.

The Charge 2 is rumoured to offer a similar strap and clasp to the Charge HR, most likely made from the same flexible elastomer material but it looks like it might be slightly slimmer in width. It has been claimed the strap on the Charge 2 would be also interchangeable, which we assume means it will feature the same mechanism as the Fitbit Alta.


Based on the leaks, the display will be much larger on the Charge 2, taking over the majority of the top of the device. There is also a larger button on the left of the display and what appears to be a stainless steel body underneath, again like the Alta.

As the display on the leaked image presents a heart rate reading, we’d expect to see the PurePulse Heart Rate Monitor on the underside of the Charge 2 like the Charge HR, and we’d also expect to see a variety of colour options. There has been no mention of proper waterproofing for the Charge 2 in the leaks so we are assuming it will stick with 1ATM resistance.

Both the Charge and Charge HR track steps, distance, calories burned, floors climbed, active minutes, hourly activity and stationary time. They also both allow the user to see daily stats and the time on the small display, along with incoming call notifications.

The Charge and Charge HR are capable of sleep monitoring and they both feature silent alarms. Additionally, they both have SmartTrack on board, which automatically recognises when you exercise and records it in the app.


The Charge HR differs slightly from the Charge in that it has the PurePulse Heart Rate monitor on board, as we mentioned. This gives users an automatic and continuous heart rate reading from their wrist.

The Charge 2 is claimed to be coming with all-day activity and sleep monitoring so we’re expecting all the same features as the Charge and Charge HR. It is also claimed to offer Multi-Sport tracking, which is a feature that was introduced on the Blaze earlier this year and allows users to track one of seven activities from walking to yoga. The PurePulse Heart Rate monitor is also listed in the leaks, as we’ve said, suggesting the new device will be more of a successor to the Charge HR than the Charge.

The leaks also claim the Charge 2 will deliver smartphone notifications. We are assuming that means it will offer the same as the Alta, which if the case, would mean calendar alerts, text messages and call notifications but no third party notifications.


Based on the Fitbit Charge 2 leaks, it looks like it will offer a similar design to the Fitbit Alta but on a larger scale.

What will the Charge 2 bring over its predecessors? Well, assuming the rumours are true, it will add smartphone notifications and Multi-Sport tracking over the Charge HR and Charge HR, as well as a bigger display, interchangeable straps and a more premium, streamlined design.

It also looks like the Charge 2 will offer heart rate monitoring, which although the Charge HR offers this, the Charge doesn’t and neither does the Alta. Ultimately, the rumours and leaks suggest the Charge 2 will be a bigger version of the Fitbit Alta, with the addition of Multi-Sport, heart rate monitoring and elevation tracking.

This is all speculation for now though as Fitbit has confirmed nothing. We’re expecting the Charge 2 and Flex 2 to be announced around IFA and we will be updating this feature as and when. For more information, head to our Fitbit Charge 2 and Flex 2 rumour round up.




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