Apple is very strict about who they allow to write software for their products. The reason Apple only allows Apple to write their own products is for security reasons. Apple is known for its security and how well protected its product system is. Apple uses a system called "Swift" to write apps and software. Swift must go through a series of steps before the app or software can be approved. Swift has to encode everything before sending it to Apple. After successful coding, Swift sends the written software to Apple to see if Apple will approve it. Once Apple approves the software or app, the software and app can be released within a few days