Why doesn't Apple let other companies use iOS?

70–80% of Apple's revenue is earned through the iPhone. Apple makes most of the chips used inside the iPhone(most because Samsung makes some too) and assembles the iPhone to give the user a complete mobile usage experience. read more

The reason macOS (operating system) doesn’t run on all PC hardware is because Apple and Microsoft have two different business models. Microsoft builds its OS to run on as much hardware as possible, and allow all kinds of users on all kinds of hardware configurations to use their products. read more

Here are the 11 ways that Apple is the most successful company in history. 1. Apple is the world's most valuable company. At the close of markets Thursday, Apple's value as determined by its stock price was $728.35 billion. That's nearly twice the market value of the world's second most valuable company, Exxon-Mobil. read more

70–80% of Apple’s revenue is earned through the iPhone. Apple makes most of the chips used inside the iPhone(most because Samsung makes some too) and assembles the iPhone to give the user a complete mobile usage experience. read more