iOS apps are developed using Apple's Xcode SDK and distributed as .ipa files through the App Store. They are compiled for ARM architecture and require a provisioning profile to sign the app. Objective-C and Swift are the main programming languages used, with Objective-C being the primary language for Apple's operating systems and APIs. Rapidsoft Technologies is an iOS app development company that has been designing robust iOS solutions since 2008 using in-house developers with global client experience.