A:AnswerI know it counts spin bike movement, but not sure what that really tells you. A crank revolution is not the same as a step in terms of calorie burn.
A:AnswerI do not have a clue. It is an app that is loaded on your smartphone and/or pc. So if someone can hack those devices - I guess they can hack this???? And really I would not think that any of this info is of any value to anyone to make them want to hack it!!!
A:AnswerYes but not quite the same way as walking but the difference should be negligible. The accuracy is not 100% and as a whole the tracker will record activity based on your overall movements (just as if you were taking strides like a pedometer). The Fitbit should give you a general response of activity.