What is iOS SDK?
IOS SDK is a software development kit developed by Apple Inc. and released in February 2008 to make the development of native apps for iOS available.
Initially designed for the development of iPhone applications (formerly named SDK iPhone) iOS SDK allows users to develop mobile applications for other devices based on OS X, iOs and Watch OS, such as iPod Touch, iPad, and Apple Watch.
iOS SDK integrates the Xcode Integrated Development Environment (IDE), as well as development tools, an iOS simulator, a compiler, and many other tools that make Apple mobile apps development easier.
The core element of iOS SDK is Xcode, Apple's integrated development environment. Xcode simplifies applications creation. Xcode includes a tool for creating graphical user interfaces, a compiler and an iOS simulator. Xcode is available as free download but requires an Apple ID to be used.With iOS SDK, developers can create and test applications without any cost. However, a subscription is required to be able to submit its apps to the App Store (these applications remain subject to Apple's approval either way).
iOS SDK allows developers to develop iOS apps using multiple programming languages, including mainly Swift and Objective-C.
Esokia Webagency has many iOS developers able to create, develop and maintain new or existing mobile apps.
Languages used are either Objective-C or Swift, depending on the nature of the projects. Esokia also develops its own tools such as a cross-platform library to apply themes or framework that simplifies cross device development.