Zuckerberg added that he thought iPhone sales were struggling because consumers are taking longer to upgrade their phones because new models aren't big improvements from prior iterations.

"So how are they making more money as a company? Well, they do it by basically, like, squeezing people, and, like you're saying, having this 30% tax on developers by getting you to buy more peripherals and things that plug into it," Zuckerberg said. "You know, they build stuff like Air Pods, which are cool, but they've just thoroughly hamstrung the ability for anyone else to build something that can connect to the iPhone in the same way."