That's the idea behind WhatsApp Wallpaper, yet another app to decorate the chat screen of our conversations with friends and groups of contacts, with the particularity that this one is an official development, with the guarantee of Facebook. So, why stick to to the boring default wallpaper of this instant messaging application when the Facebook app allows us to customize the aspect of our conversations with eyecatching wallpapers? How many hours do you spend a day chatting with friends and sending audios, videos, and photos on WhatsApp? You're better off not trying to calculate it but it's obviously plenty of time.