A:AnswerYes you can make driving an activity thus it deducts steps during this activity but there are very detailed instructions on how to do this
https://community.fitbit.com/t5/Charge-2/Steps-counting-while-driving/m-p/1653005#M8149
A:AnswerJeffery,
If you cannot get a measurement of her wrist, then I would go with the small. I have what I consider to be a medium wrist and there is extra room on the watchband. Hope this helps this late.
A:AnswerYou need to wear it, otherwise it won’t give you steps and heart rate. When I keep it in my pocket I don’t see the Number of steps. It was ask you to jump occasionally- now sure why perhaps because I have a low heart rate.