The Australian government says its COVIDSafe app identified 2,827 potential close contacts from 37,668 encounters in NSW and Victoria. Only 17 cases in NSW were identified separately to manual contact tracing efforts, however.

Source: COVIDSafe uploaded 1.65m ‘handshakes’ and was only used by NSW and Victoria | ZDNet

I have been pointing out for 15 months that the technology for smart phone contact tracing is inadequate and prone to significant errors, with a high false positive rate, and missing many actual contacts. Ultimately, the teach has found very few unique cases – but it has managed to shut down whole industries in the UK after flagging 600,000 people in one week, and forced a fully vaccinated Prime Minister who also had natural acquired immunity since he had the disease – in to a 10 day quarantine.