The official iOS App Store is packed to the brims with apps, so much that Apple is actually in the process of rewriting their search algorithms to allow better experiences on the store. Out of all the apps which Apple accept and allow on the store, some of the most popular offerings live within the Social Networking category. The WhatsApp mobile app is undoubtedly the most popular out of those, consistently sitting at the top of the download charts with over fifty million downloads.
