If apple makes ios open source, the world will be changed. In 2013, Android OS was 80% of the worlds smartphone population. Why? The main reason to this is that android is open-source meaning that anyone can change and redistribute it. There are many cheap and affordable android phones due to this, but IOS is strictly used by apple IPhones, which are costly. If IOS is made open-source, that means that phones will be made for cheap that use apple services, Android phones and IOS phones will become more compatable.