Facebook Takes the Gloves Off in Feud With Apple

For years, signs of discord have brewed between Facebook and Apple.

Their chief executives, Apple’s Tim Cook and Facebook’s Mark Zuckerberg, have periodically taken thinly veiled shots at each other. “If they’re making money mainly by collecting gobs of personal data, I think you have a right to be worried,” Mr. Cook said of companies like Facebook in 2014. In turn, Mr. Zuckerberg has retorted: “You think because you’re paying Apple that you’re somehow in alignment with them? If you were in alignment with them, then they’d make their products...