Readers can read a limited amount each day for free or subscribe weekly, monthly, or annually.
They must be started from an existing Messenger conversation.
As well as transforming the look of the browser version of the app – which you can also access on desktop – it could ensure i Pad users receive notifications in much the same way as they would on i Phones.
Whats App has rolled out a number of useful features over recent weeks, including Delete for Everyone.
It's made by Wattpad, a website for user-generated writing.
Facebook has added video calling to its Messenger app, letting anyone with an internet connection and the app talk to each other through their phone.