When hiring an iPhone app developer, it is important things to consider their skills & experience. The top qualified iPhone app developers will have a robust programming language understanding of Swift and Objective-C and experience with Xcode and iOS SDK development. They must grasp the iOS Human Interface Guidelines and be well-versed in using common iOS frameworks and libraries. One more thing is technical skills. Top iOS app developers must have excellent problem-solving and analytical abilities, strong communication, and teamwork management skills, and they often work with other developers, designers, and product managers.