According to latest information, Allo, Googles messaging utility is expected to come with lots of useful features.
The chats can have an expiry within Incognito mode.
Users can also select how long they want their chats to last before being deleted.
These can be changed by either the recipient or sender throughout the conversation.
Also, the times can be changed.
Google Allo is expected to come with end-to-end encryption, as it is using the Signal protocol.
However, Google Assistant wont work when encryption is activated in Allo.
Also, private messages will have a tool that allows them to auto-delete, according to Android Police.
However, it wont be required for backups or synched chats.
Source:Android Police
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source: www.techworm.net