There are now heaps of messaging services around, but WhatsApp has a bunch of features and is extremely widely used.
The Facebook-owned app claims to have over two billion users worldwide, which is pretty unbelievable.
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Find who you talk to most
Who is really your favorite person? It might not be who you think. In WhatsApp, there is a way to find the people you send the most messages to and how much storage each person takes up, among other things.
iOS & Android: Settings > Storage and Data > Manage Storage > You’ll see a list of contacts at the bottom in order of which is using the most storage.
