Almost every year, Apple releases a new iOS version. Because each version features more or fewer technological advancements, an iOS app development business must upgrade. The programs must adhere to the updated standards in the latest version. Apart from the iPhone, developers must think about a variety of other Apple products while designing apps. As a result, developers must test their apps across all Apple devices, including the iPhone, iPad, and iPod. The developers must choose from a variety of iOS devices to test the ios app development company compatibility, uncover issues, and solve them swiftly. Older versions of mobile apps must be updated to be compatible with the most recent releases.