An easier question to answer is what was Holden not critical of...there would be a lot fewer things! Anyhow, look at that word: phony. Loosely, this means someone (or something) that is not acting genuinely, or in a fraudulent way. Holden finds many people in the story guilty of violating this code of conduct.
A report released Wednesday says Facebook is the top-downloaded iOS application on iTunes App Store. Facebook's flagship application is the most downloaded iOS app of all time on the iTunes App Store. A report released Wednesday by mobile app analytics firm App Annie shows Facebook's Messenger app comes in at No. 2, followed by other popular apps, such as YouTube and Skype. Instagram and WhatsApp Messenger, which were both acquired by Facebook over the past 3 years, take the No. 4 and No. 6 spots, respectively.
Application software for the iPhone, iPad and iPod Touch can be downloaded from the App Store. iTunes 12.5 is the most recent major version of iTunes, available for Mac OS X v10.9.5 or later and Windows 7 or later; it was released on September 13, 2016.