The programming is done in Swift or Objective-C and then published and made available to download on their native App Store. Businesses or individuals can get started with their iOS mobile apps either by hiring an iOS developer or consulting an iOS app development company. Xcode is a powerful tool and is the Apple IDE to develop apps for Mac and iOS. The written iOS app needs to be tested for bugs and errors and get feedback from testers before publishing it to the App Store. The App Store only accepts apps that have been signed and published by Xcode.