There are many iOS compatible browsers on the market. However, the apple products themselves come with a preinstalled safari browser. It does support other browsers such as chrome and opera mini. There can be certain issues with the safari browsers which is why apple users tend to shift to chrome to browse the internet as they please.
The choice of internet browser is dependent on the user himself. They can download new browsers and set them as the primary app they use for browsing the net. They can also continue to use safari if they like the browser and are not slowed by it too much.
