A large number of documentation, technical literature and a huge community
EASY TO USE
Objective-C compatibility within Swift-written projects
A LOT OF TOOLS
All frameworks introduced by Apple are based on Objective-C
Ease of use (the ability to control / start / stop the timer at any point of the program)
Objective-C is an object-oriented extension of the C language, which is based on Smalltalk paradigms. It is written the vast majority of applications in the App Store, and studying programming for iOS or macOS, it is the fundamental basis. Thus, knowledge of this programming language is the minimum necessary for an Apple developer's career.