I'm not sure current case numbers really tell you much either way - you could equally argue that it's evidence that the app didn't work of course. The issue in

I'm not sure current case numbers really tell you much either way - you could equally argue that it's evidence that the app didn't work of course. The issue in particular is that Bluetooth proximity isn't reliably able to distinguish between "next to but with a meaningful barrier in between" and "actually next to". In my office, for example, we have areas adjacent to one another separated by floor to ceiling glass walls. People working on one side of the wall don't work with people on the other side and are not allowed to access the other area. There are quite a few scenarios like this (apartment blocks with thin partition walls between apartments, sat in a traffic jam next to another car, etc.