Installing apps is a blocker to use, as is Bluetooth

“What we can say is the quality of the Bluetooth connectivity for phones that have the app installed running in the foreground is very good,” he said. “And it progressively deteriorates and the quality of the connection is not as good as you get to a point where the phone is locked and the app is running in the background.”

Original source: How did the Covidsafe app go from being vital to almost irrelevant?