There has been recent changes with two of the usually used apps like Facebook and Foursquare. Both of the apps now require the installation of separate application for the functions which are commonly used.
Facebook now requires mobile users to install The Messenger apps. This sparked outrage from users as the messaging was already part of the older version of the app. Now whenever you send and get messages, it will just prompt a page that the function has migrated to the external app and a link to download page in Google Play.
This also happened with Foursquare when they made Swarm which is now the app needed to perform checking into places which Foursquare was used to be its former purpose. Foursquare has now become more of a information and indicator app which seems unessential and has become a hassle for the users.
