Most people in developed countries use iPhones as their mobile phone of choice.
The iOS operating system is quite challenging as it's restrictive to customization compared to Android phones, but it's user friendly enough that several people still prefer it.
That's why companies who want to offer applications for their services need to integrate it with the strict iOS operating system.
You need an iOS app developer who can code business tools, games, and applications that you want to offer your clients, depending on your specifications.
iOS developers are proficient with iOS coding languages, such as Swift, to create the app for your business.