Google Allo is a free to use program.
=== Optional encryption ===Following Allo's introduction at Google I/O, Google was criticized by security experts and privacy advocates for having the end-to-end encryption turned off by default, which they argue leaves the app open to government surveillance
 An in-chat translation feature appeared to some users in version 17 and rolled out to all in version 18, the latter of which was released in September

