Pi Network is a cryptocurrency project aimed at enabling users to 'mine' the currency through their mobile phones, without the need for powerful equipment or significant energy consumption.
The app was launched in 2019, and access to it depended on an invitation from an existing member.
The operational model involves users clicking the 'mine' button daily, earning small amounts of Pi, and they also play a role in building 'Security Circles' that contribute to the security of the network.