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What is mobile application development?

Explore the processes and software used to develop mobile apps

Building software for mobile devices

The definition of mobile application development can be broad—encompassing all the processes involved in the creation and release of a mobile app—or specific, referring to the coding and deployment of the app. This article will cover both definitions of mobile app development and focus especially on defining mobile app development for people who make decisions around or are responsible for how the software itself is built.

To define mobile application development, we should start by defining mobile, which in this case refers to portable electronic devices such as smartphones, tablets, laptops, smart watches, e-readers, and handheld game consoles. By application, we mean not only the software native to those devices, but also the common operating systems, platforms, and languages that those devices support. As you'll learn, there are many different ways to approach mobile app development and many decisions to make.

The mobile application development process

The process for creating and releasing mobile apps is often understood in a series of steps or phases. These phases of the mobile app development process involve many different people and disciplines within an organisation, including business, marketing, design, and engineering. The phases of the mobile app development process are:

  • Strategy
  • Planning
  • Design
  • Development
  • Testing
  • Release

How long does it take to make a mobile app?

Organisations spend anywhere from three months to nine months—or longer where required—developing mobile applications. The scope and features of an app all influence the timeline of the mobile app development process.

Strategy

The mobile application development process begins with understanding why a mobile app might be a good solution to a problem or approach to an opportunity—and then deciding what to build and how. In the strategy phase, organisations will establish the app's objectives and measurements of success, analyse the market and the competition, research their customers' needs, and determine which users and use cases the app will serve. In the strategy phase, organisations might also begin to explore which mobile app development platforms would work best with their goals and requirements. It is at this phase that organisations also begin to consider the marketing around the app's release.

Planning

In the planning phase, organisations agree on four key details of the mobile app development process: the teams, tools, technologies, and timelines. By now, they have an idea of what type of mobile app they need to build, who will be building the app, and which platform or platforms they'll use. During this phase, organisations will lay out a product roadmap—decide which features will be built in what order and by when—set milestones, and design a project plan that will allow them to meet their intended release date. Knowing what resources and expertise are available along with understanding how to implement the technology chosen for the process are vital for determining that date and achieving the release.

Design

The appearance, features, and function of the mobile app begin to take shape during the design phase. In this phase of the mobile app development process, teams will chart the user experience and create the user interfaces and the states of the app at various fidelities. They may begin with low-fidelity mock-ups to provide proof of concept or gather customer feedback at an early stage. Developers and engineers may help create prototyping or consulting on UX and UI decisions at this phase—keeping teams aware of the requirements and technical specifications of the platforms the organisation has elected to use. This way, organisations when move to full-fidelity screens, they've designed an app that can truly be built.

Development

The word development in this context sometimes refers to the full software development lifecycle involved in creating and releasing a mobile app. More commonly, though, development means this software development phase of mobile app development. We will define this phase more fully later in the article. For now, this phase is best described as the step in which teams establish the technical architecture and technological stack—including the front end, back end, and APIs—set development milestones, determine the development lifecycle for the app, and code the app.

Testing

Testing is a crucial phase of the mobile application development process. Without testing, organisations cannot be certain that their app will be secure, work the way that users need and expect it to, and function where they deploy it. During this phase, teams provide quality assurance, creating test cases to assess the usability, performance, stability, and security of the app on all the devices the app is intended to run on. Organisations will often stress-test the app to ensure that the application's architecture can scale to meet sudden heavy demand.

Release

The final phase in the mobile application development process is release. Once the app is deployed, the organisation provides support to customers using it and on-going monitoring and maintenance to ensure the app is available and performing as it should. Marketing campaigns and motions to encourage adoption of the app often coincide with this phase. If the organisation decides to make enhancements or alterations to the app that go beyond the scope of changes their development lifecycle is equipped to handle, they may decide to begin the mobile app development process anew.

Software development in the mobile app development process

This first task of the development phase is to establish technical architecture of the mobile application. Often confused with technical stack—which includes the front end, back end, and APIs—technical architecture is the rules and patterns that govern the development of the mobile application.

Technical architecture

The technical architecture is often conceived of in three layers:

Presentation layer

This is the layer of the app that the customer sees and interacts with. The presentation layer includes the user interface and all the elements of the app that make up the user experience.

Business layer

The logic that governs workflows, data exchange, and operations resides in the business layer. Core aspects of the mobile app such as security, caching, logging, and exception handling are handled in this layer.

Data layer

The data layer serves the requirements of the application itself, providing data utilities, data access components, and helpers or service agents. It's also the layer that validates and maintains data and supports data transactions.

Technology stack

Similarly, the technology stack—or tech stack—also consists of three pieces as mentioned. However, these pieces represent specific choices used to build and support the app rather than guidelines for its creation.

Front end

Corresponding closely with the presentation layer, the tools and languages used to code the front end of the mobile app depend heavily on the devices the app will be deployed to. There are many options, and most mobile devices have specific languages that are native to them.

Back end

The back end is the part of the app that includes the database and other similar objects that reside on a server and support the functions of the mobile app. Teams are less beholden to the devices when it comes to choosing mobile back-end technologies and can often find pre-built back-end solutions.

API

The app communicates between the back end and the front end through the API—which also enables the app to integrate and interact with other apps and services.

However, before teams can choose their tech stack—or even establish their technical architecture—they first need to decide what type of mobile app they're building.

Types of mobile apps

When it comes to building apps for mobile devices, organisations have several different types of mobile apps to choose from. In this case, mobile app type refers not to what the app will allow its users to do but how the app will be built.

Native apps

Apps that are specific to a certain device or platform—such as Android or iOS—are called native apps. These apps run directly on the operating system of the device, use the languages and frameworks the platform provides, and are deployed through the store or marketplace specific to the operating system. Native apps typically have full access to all the features and hardware of the devices they run on.

Cross-platform apps

Teams can code in app in the languages and frameworks of their choosing and then compile the code for each operating system the app is intended to run on using platforms like Xamarin. Cross-platform apps, as these are called, allow teams to run on many different devices and reuse a large portion of the code—though bridging the code requires more work than developing for just one platform.

Progressive web apps

Like web applications, progressive web applications run in mobile browsers and are typically built using JavaScript, CSS, and HTML5. What makes web apps progressive is their ability to provide push notifications, better touch gestures, and hardware interaction using advanced browser capabilities. There are no SDKs to help build progressive web apps, but they can be deployed without going through a marketplace.

Hybrid apps

A mix between native apps and progressive web apps, hybrid apps are essentially natively coded containers that run web applications. This combination allows the app more access to the features and hardware of the devices and run on more types of devices—all while keeping a single codebase. For all their advantages, hybrid apps typically do not achieve the performance that other types of mobile apps do.

Which type of mobile app to build

The type of mobile app an organisation chooses to build has heavy implications over the tools, platforms, frameworks, languages available to their teams, the distribution of the app, the number of code-bases to maintain, which devices the app will run on, and even what the app can do.

As you decide which type of mobile app to build, it is helpful to consider who your users will be and what they need from the app. For example, if they use mainly one type of device or operating system, a native app might be best. Apps that don't rely on hardware sensors or GPS may be well-suited as progressive web apps or hybrid apps—but perhaps not if your users don't have good connectivity. If your users are members of your business or organisation, you may want to consider a different mobile strategy. And of course, it all comes down to the expertise you have available within your organisation or through a partner.

This chart outlines more of the differences and similarities between different types of mobile apps to help you consider which type you should build.

Comparing types of mobile apps

Not available Native apps Cross-platform apps Progressive web apps Hybrid apps
Number of codebases One per platform One, but compiled for each platform One total One for the app, another for the container
Languages and frameworks Native only Team's choice Web only Web and native
Access to SDKs and APIs Yes Yes No Limited
Performance Highest High Lowest Low
Access to device hardware Complete Most Very little Some
Responsiveness to user input Good Good Worst Poor
Interactivity High High Lowest Low
Device resource use High High Low Medium
Requires connectivity No No Yes Yes
Cost to build and maintain Highest High Lowest Lower
Where the app is stored Device Device Server Device and server
Deployed through Marketplace Marketplace Browser Marketplace
Requires outside approval Yes Yes No Yes

Mobile application development platforms and software

Once you've decided what type of mobile app you're going to build—or perhaps as you're considering which type—you'll want to evaluate mobile application development platforms. These are the platforms you'll use to build, test, debug, manage, and in some cases even deploy mobile apps throughout their lifecycle. Most app development software includes front-end tools to build the interface, back-end tools to handle data, API tools, testing tools, and tools for collaboration and code analysis.

Most mobile application platforms aim to provide everything a developer needs to build a mobile application. This allows developers to avoid issues moving between different pieces of mobile development software—and dealing with issues that arise between them, such as code integrity, incompatibilities, and data loss. Mobile app development platforms also reduce the cost, time, resources, and expertise required for an organisation to create a mobile app. While a few organisations choose to build their own platforms, many more opt for one of the many app development alternatives available.

The best mobile app development alternatives for an organisation use vary based on what types of mobile app they intend to create, what languages they can code in, and what devices they want to serve. Some mobile app development alternatives include:

  • Cross-platform tools like Xamarin that allow developers to build Android and iOS apps using .NET and C#.
  • Visual Studio Tools for Xamarin, which uses a single shared codebase for Android, iOS, and Windows mobile apps.
  • Low-code or no-code tools like Power Apps. Low-code is a simple way to build professional-grade apps without technical training or expertise. Learn more.

Mobile app development resources

Explore Azure for mobile developer docs

Find the information you need to develop mobile apps on Azure. Learn about push notifications, authentication, analytics, and SDKs.

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Frequently asked questions about mobile application development

  • The definition of mobile application development can be broad—encompassing all the processes involved in the creation and release of a mobile app—or specific, referring to the coding and deployment of the app.

    Learn more

  • The phases of the mobile app development process are strategy, planning, design, development, testing, and release.

    Learn more

  • As you decide which type of mobile app to build, it is helpful to consider who your users will be and what they need from the app.

    Learn more

  • The best mobile app development alternatives for an organisation use vary based on what types of mobile app they intend to create, what languages they can code in, and what devices they want to serve.

    Learn more

  • Organisations spend anywhere from three months to nine months—or longer where required—developing mobile applications.

    Learn more

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