As reported here recently, lawyers in Canada plan to offer data from a wearable device as evidence in a personal injury lawsuit pending in Calgary. The plaintiff in a car accident case seeks to submit data from her Fitbit to prove that she—a former personal trainer—is now less active than average women in her demographic. If admitted, this may set the stage for making such evidence common practice in accident and personal injury cases. As long as the data can be authenticated, there is no intrinsic bar to its admission. However, because wearables can be taken off, worn by someone else, or give false readings, their reliability may be easy to undermine. Similarly, while GPS information has long been accepted, the proliferation of that technology could lead to an explosion of its use in court cases.