The article states that Singapore's app doesn't use the protocol developed by Google/Apple, so I assume their app has been designed to collect location data whe

The article states that Singapore's app doesn't use the protocol developed by Google/Apple, so I assume their app has been designed to collect location data whereas my understanding of the Google/Apple protocol is that it doesn't reveal location data (at least by itself, maybe with enough data/matches you could figure out rough locations)