Fitbit is rumored to be prepping a smart watch for launch, though the wrist-worn computer isn't expected to run on Android's flexible Wear platform.

Details of the smart watch, the Fitbit Surge, appear on a flyer that was leaked to The Verge. Rumors about the Surge follow a pair of leaks purporting to reveal details about Fitbit's upcoming Charge and Charge HR smart bands.

The flyer indicates the Surge is designed for all-day wear, fitness tracking and recording multisport workout summaries. The smart watch will deliver "smart notifications" and Fitbit's PurePulse software to track heart rate.

The band's comfort and its healthy battery life will allow users to track activities all day long. Wearers will be able to track heart rates, steps taken, distance traveled, calories burned, floors climbed and minutes active, and it also includes built-in GPS tracking.

For more active workout sessions, Surge wearers will be able to use the fitness tracker to collect custom metrics on activities like cross training and running.

Surge wearers will also be able to track the quality of their snoozing hours and the smart watch can also be used a "gentle" alarm, using vibrations to awaken slumbering humans.

The smart notifications include call and text alerts. Wearers will also be able to control music on a connected device from the Surge's interface.

The Surge will come in black, slate and tangerine. Wearers will also be able to swap out its faces, according to the purported leak.

Just a few days before the Surge's alleged promotional ad leaked, flyers for the Fitbit Charge and Charge HR began making their rounds around the Internet.

The pair of bands feature LED faces that report wearer information such as steps taken, calories burned and other fitness metrics. The Charge HR's heart rate monitor appears to be what separates it from the Charge.

The Charge and Charge HR may be Fitbit's attempt to rebound from the Force fitness tracker, which contained nickel and a sparked allergic reactions in some wearers. Fitbit recalled trackers from wearers who'd had adverse reactions and issued refunds.

James Park, Fitbit CEO and co-founder, said the allergic reactions appeared to have been triggered by the methacrylates that were mixed into the Force's adhesives, attributing adverse reactions to nickel to a lesser role.

"We have consulted with dermatologists who assure us that reactions to these materials used in the Force would be limited to the rashes experienced by some of our users, and that these rashes would be expected to heal on their own," said Park on Oct. 17.

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