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.
Facebook Messenger app takes the No. 2 spot on the most downloaded list. By worldwide revenue, the top three iOS apps of all-time are Pandora Radio, Line Messenger and Zoosk.
This statistic contains data on the number of apps available for download in leading app stores as of March 2017. As of that month, Android users were able to choose between 2.8 million apps. Apple's App Store remained the second-largest app store with 2.2 million available apps.