Hiring an iOS app developer is crucial if you aim to expand your business in the Apple market. They possess specialized knowledge of the iOS platform and coding languages like Swift and Objective-C. They can create user-friendly, secure, and high-quality applications tailored to your business needs. Moreover, they ensure that your app is compliant with Apple's App Store guidelines, increasing the likelihood of approval. They also provide regular app updates, maintain its functionality, and implement new features as per user feedback. Hence, an iOS developer is essential for a smooth, efficient, and successful app development process.