Microsoft researchers are developing a clock that tracks the location of any Weasley family member at any given time. Designed for the (non-existent) family with no issues over personal privacy, the “whereabouts clock” will track the GPS signal on family members’ cell phones. Whether Elsewhere means a brothel, a crack house or just another family’s house for a decent meal, this sounds like a real Domestic Doomsday Device to me. The clock is based on the magical clock in the Harry Potter series.”]
Source: https://gizmodo.com/the-death-of-privacy-harry-potter-edition-130250