[Broken_Hippo]

If you are using it for data instead of control, well, that's months of data about how people move around with varying restrictions. It is enough to refine policies and note how different sorts of restrictions change people's behavior. For example, if no one really follows x mandate, well, you either drop the mandate, change it, or come in with some fairly heavy-duty force.

Now, other uses might require more time. If you really need to see where the person has infected others and this is your tool, it might not be enough time. It is too early to tell, though, and I'm not sure how well phone inspections would go here in Norway nor how many people would download the app. It would make me more likely to leave my phone at home if, you know, I had much life outside of home.