App Development

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What Is App Development?

App development is the process of building applications for use on various operating systems through the use of one or more programming languages. App development is principally completed by teams of software engineers, with input from project managers, data scientists, designers, writers and additional personnel on the content that goes into the app.

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What Do App Developers Do?

App developers are responsible for the development of all the code, assets and frameworks that form an application.

App developers are software engineers who construct applications for use on the web, on operating systems like Windows and MacOS or on mobile platforms like iOS and Android. These engineers are responsible not only for writing the code and constructing the app, either individually or as part of a team, but also for brainstorming ideas, testing functionality and researching algorithms that will allow the app to function and meet its goal.

Along with working alongside other app developers as part of a team, app developers often work with graphic artists, UX designers, data scientists, senior data scientists, project managers, marketing teams, copywriters, SEOs and many other parties that all play a critical role in the creation of successful apps.


What Programming Language Is Used for Mobile App Development?

Swift and Objective-C are used when developing iOS apps while Android apps can be developed using JavaReact Native facilitates development for both.

Although Objective-C is the original programming language used for developing iOS applications, Swift is considered the best programming language for building iOS apps today. Swift offers better memory management, relaxed syntax rules and a shorter learning curve than Objective-C. All of Apple’s iOS frameworks are written in Objective-C, however, so many developers will at least maintain a portion of their app’s code in this language.

Android applications are most often constructed using Java, which is Android's official programming language. The language’s long history and reliability make it a natural choice for many developing apps for these devices. Other programming languages like the open-source Kotlin and the high-powered C/C++ are also widely used on the operating system, however.

Beyond developing applications for specific operating systems, the hybrid React Native framework allows developers to build applications that can be launched in either environment. Released by Meta in 2015, React Native incorporates several UI frameworks to facilitate functional cross-platform development using JavaScript programming, leading to widespread adoption in the app development industry.

App Development: Process Overview, From Start to Finish. | Video: Udemy and Angela Yu


How Much Does it Cost to Build an App?

The high median cost to build an app is $171,450 but can range from $30k through $700k. Apps often take between three and twelve months to build.

According to a 2018 survey from Clutch, the median cost for developing an app on any platform is $171,450, with a range from $30k-$700k. There are many factors that go into this cost, including resources available to the developer, the business model the developer is targeting, the type of app being developed, the quality of competitors’ apps, how complex the app is, how much functionality is built into the app, design expenses, market share and the time it takes to develop.

Additionally, the country the app is being developed in will be a factor in its development, due to labor laws and production variables. These factors must be considered and weighed heavily when determining a budget, scope and timeline for an app’s creation.

Most apps can be built between three and 12 months, but more extreme builds can take years to complete. Ongoing development and continuous improvement mean an application will continue to be developed indefinitely.


Expand Your App Development Career Opportunities

Learn from the experts and learn the skills to drive your career forward with an app development course from Udemy.



Learn ow to create your own business making an app with no programming skills required.


What you'll learn:

  • Understand the mindset of successful individual app…



Simple step by step approach for developing applications for Face Recognition


What you'll learn:

  • Python, Artificial Intelligence, Face Recognition, Introduction…



Become an iPhone App Developer


What you'll learn:

  • iPhone App Development

  • Swift Programming

  • Mobile Development Design…



From Beginner to iOS App Developer with Just One Course! Fully Updated with a Comprehensive Module Dedicated to SwiftUI!


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App Development Certifications + Programs

Give your resume a boost by earning an expert-driven app development certification from Udacity.

General Assembly’s Software Engineering Immersive is a transformative course designed for you to get the necessary skills for a coding role in three months. 

The Software Engineering bootcamp is led by instructors who are expert practitioners in their field, supported by career coaches that work with you since day one and enhanced by a career services team that is constantly in talks with employers about their tech hiring needs.


What you'll accomplish

As a graduate, you’ll have a portfolio of projects that show your knowledge of fundamental programming concepts, as well as experience with languages, frameworks, and libraries that employers demand. Throughout this expert-designed program, you’ll:

  • Create a front-end web application with modern JavaScript frameworks such as Angular or React.

  • Develop and deploy full-stack applications with in-demand technologies such as Ruby on Rails, Python with Django, and Express with Node.js.

  • Build secure full-stack applications by leveraging common design and architectural patterns like model–view–controller (MVC) and Representational State Transfer (REST).

  • Practice version control and collaborative software development with Git and GitHub.

  • Safely model and store data in SQL and NoSQL databases.

  • Consume and integrate third-party application programming interfaces (APIs) in an application.


Why General Assembly

Since 2011, General Assembly has graduated more than 40,000 students worldwide from the full time & part time courses. During the 2020 hiring shutdown, GA's students, instructors, and career coaches never lost focus, and the KPMG-validated numbers in their Outcomes report reflect it. *For students who graduated in 2020 — the peak of the pandemic — 74.4% of those who participated in GA's full-time Career Services program landed jobs within six months of graduation.  General Assembly is proud of their grads + teams' relentless dedication and to see those numbers rising. Download the report here.


Your next step? Submit an application to talk to the General Assembly Admissions team



Note: reviews are referenced from Career Karma -

4 months
10 hours

Start by learning the fundamentals of cloud development and deployment with AWS. Then, build different apps leveraging microservices, Kubernetes clusters, and serverless application technology.

4 months
10 hours

Built in collaboration with Google, this program will prepare you to become a professional Android developer and allow you to create a diverse portfolio of projects to show employers. By the end of this program, you will be able to use Android development platform best-practices, Android Studio, Android Jetpack, and Kotlin to build your own apps for the world’s most-used mobile platform.

4 months
10 hours

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