: Flutter is a web and mobile programming language developed by Google. This language creates various applications for different operating systems such as iOS, Android, web, and desktop through a single source code

Swift is a high-level programming language developed by Apple for iOS, macOS, watchOS, Linux, and iPadOS. Generally, this language is designed for Apple products.

MongoDB is a NoSQL database designed for storing and retrieving information. This database is widely used in web and mobile applications.

GitHub is a source code management service developed by GitHub. This service is used for storing, retrieving, and managing source code in programming projects.

CocoaPods is a dependency manager system for Swift and Objective-C programming projects. It is built with Ruby and can be installed on the macOS operating system. The website suggests using the default Ruby.

Familiarity with these languages and services is very useful for a developer as it helps them develop effective and executable applications for different operating systems.

Being an app developer is a pleasant and challenging profession that requires extensive knowledge of computers. If developing for the Apple operating system, developers should be able to meet the requirements of the Swift language, which is an open-source language developed by Apple in July 2010, initiated by Chris Lattner with the collaboration of many other programmers at Apple. Swift language took ideas from Objective-C, Rust, Haskell, Ruby, Python, C, and many other languages to build its own frontend for creating apps for watchOS, iPhone, iPad, macOS, and tvOS. Additionally, one can use databases like MongoDB or Realm for backend development. Android also has its own program for developing applications dependent on the Android operating system, known as Android Studio. In addition to all of this, in 2017, Google created an open-source software development kit called Flutter for platforms such as Android, iOS, Microsoft Windows, macOS, Linux, Google Fuchsia, and web. Creating applications compatible with iOS or other platforms is a very desirable and rewarding task.