X, a stand-alone messaging app, has been launched to the public on Friday for iOS devices.
The new app allows users to connect with their X contacts for messaging, file sharing, audio and video calls, as well as group chats.
Initially available only on iOS devices, the company first began publicly testing XChat with a small group of beta users earlier this year.
XChat is a key piece in the strategic vision for the company, which sees the social network as a jumping-off point for other services like messaging or payments.
The app offers support for messaging and calling, as well as features such as privacy-protected messages, disappearing messages, and screenshot blocking.
All messages are end-to-end encrypted and PIN protected, although security experts have previously disputed the company's encryption claims.