A:AnswerIt's not clear what you want to track but I like the Fitbit Charge HR. It tracks your heart rate, steps taken, stairs climbed and calories burned. When used with the Fitbit app, you can enter food eaten and more.
A:AnswerSince music is not an option for the Fitbit HR Charger you must carry another device. However you really aren't carrying the fitbit, since it is worn like a watch.
A:AnswerI find my HR to be equal in tracking abilities to the Misfit Shine 2.
Obviously any tracker that has active GPS will prove to be the best tracker for distances.
The Heart Monitor is equal to that of my Samsung Gear 2.
A:AnswerMake sure that you sync your fitbit to your phone or pc. This should update the date and time. When I travel I have to do this to get the right time zone to show up.
A:AnswerIt is best to have separate userids per person; each person should be able to track their own record of achievements. It's also a great way to compare notes and encourage each other.
A:AnswerThe battery is build in (not replaceable). It comes with a special charger that connects to the USB port of your computer. It does not come with an AC adapter so if you need one, grab one in your way out of the store. They USB AC adapters aren't usually very expensive.
