This works exactly the same way on iOS or any device that supports Bluetooth low energy, since it allows very fine grained location detection. Try it yourself.
This has caused some issues for covid apps since, to use BLE on Android, you need to request the location permission - which people were naturally afraid to do.
This has caused some issues for covid apps since, to use BLE on Android, you need to request the location permission - which people were naturally afraid to do.