What are the odds you will have to have a Facebook account with full profile to access these apps?
Now compare Facebook's privacy record vs. Apple's. Whatever else you think about Apple, you must admit that Facebook is far, far worse about respecting user privacy. Facebook's record in user privacy is abysmal, with Zuckerberg's attitudes towards Facebook's users' privacy concerns just dripping with contempt. Facebook has violated its own privacy policy many times, with forethought and malice.
Sorry, Zucky ol' bean. Cold day in Hell before I trust you enough to do anything at all through Facebook. As far as I'm concerned, anything at all associated with Facebook is a huge data-scraping trojan horse. There is no app compelling enough to overcome that distrust.