The software will be modelled after Apple and Google's privacy-centric method of one smartphone detecting another, BBC https://www.bbc.com/news/technology-53753678 said.

Engineers were still trying to resolve issues with the Bluetooth-based tech wrongly flagging people as being within 2 meters of each other.

The app will let people scan barcode-like QR codes to log venue visits, as well as implementing Apple and Google's method of detecting other smartphones, the BBC reported.