It's the fact that it logs other people's data, not just it's own, that makes it less than perfect anonymity. But then again... You'd need to have a list from

It's the fact that it logs other people's data, not just it's own, that makes it less than perfect anonymity. But then again... You'd need to have a list from the "other side", to actually deanonimize this data. At that point, you can just get WiFi and Bluetooth physical addresses.