You can also link it to an existing Google account, though you don't have to.
Allo also "learns over time," and can suggest smart replies through its machine learning, natural language processing, and image recognition abilities.For example, if your friend sends you a picture of a dog, Allo could suggest the response "cute dog!"
All of Allo's chats will be encrypted, but in an "incognito mode" similar to what it offers on Chrome, messages will be end-to-end encrypted, meaning that Google won't be able to read them at all.
Google now has three seperate messaging apps: Allo, Hangouts, and the newly launched Spaces.
The key differentiator with Allo, though, is the smart assistant integration.
Allo will launch on Android and iOS this summer.