While the RockFit Fitness Tracker works best when it is linked to a smartphone, this doesn’t mean that it cannot function on its own at all. Data that it collects is transferred to your phone when connected, however when not connected to your phone this data stays stored in the device for up to a week before it is reconnected to your device.As per the official website, RockFit watch has a built-in charger and it’s compatible with any USB cord available at your home. The built-in charger can be found at the top of the watch. The battery of the device is good enough as it can last for up to seven days on standby before it requires to be charged again. As for the charging, it doesn’t take very long, only a couple of hours. You can connect it to a wall socket, your desktop or another device to charge the RockFit watch..Click Here https://www.wfmj.com/story/42813699/rockfit-fitness-tracker-reviews...