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.
WhatsApp (Android, iOS, WP8) (Free download, $0.99/year). Remarkably easy setup, automatic syncing with your phone's contacts and a feature-rich, ad-free experience all combine to make WhatsApp (Android, iOS, WP8) a wildly popular mobile messaging app.