What is an App? Apps Definition, Types, Benefits, Costs & Examples

In today’s hyper-connected digital world, apps are everywhere—from ordering your favorite meal, catching a ride across town, and tracking your fitness goals, to managing your entire business right from your smartphone. But have you ever stopped to wonder: “What is an app?” or “How are apps built?” What exactly do we mean when we say "app," and how do these digital tools shape the way we live, work, and connect?

In this comprehensive guide, we’ll break down the apps definition in simple terms, explore the different apps type (mobile, web, and desktop), highlight the key benefits of using apps, and even walk you through what it takes to build one—including estimated development costs. You’ll also discover real-world app examples that have revolutionized industries and changed daily routines for millions.

Whether you're a business owner planning to launch your own app, a developer analyzing trends, or simply someone curious about the world of mobile apps, this blog is your go-to resource for understanding what an app is—and why it matters now more than ever.

And if you’re looking to build your own app quickly and efficiently, FAB Builder can help. With its powerful ai-assited low-code/code generation platform, customizable modules, and built-in SaaS-ready components, FAB Builder makes it easier than ever to bring your app idea to life—no matter your technical background.

You’ll also learn the essential steps of how to build an app—from refining your concept and choosing the right tech stack to development, testing, and deployment. Whether you're a startup founder, a curious entrepreneur, or a digital product enthusiast, this blog, powered by insights from FAB Builder, is your all-in-one guide to understanding and creating impactful apps in 2025.

What is an App?

An app, short for application, is a type of software designed to carry out specific tasks on digital platforms such as smartphones, tablets, or computers. Whether it's for entertainment, communication, productivity, or information access, mobile apps offer users an easy, intuitive way to interact with technology.

To use an app, users typically download and install it from an app store tailored to their device’s operating system, such as the Apple App Store for iOS or the Google Play Store for Android. Many apps are available for free, but developers often implement monetization strategies like in-app purchases, subscription models, or advertisements. This allows app creators to generate revenue while still offering users low-cost or no-cost entry, striking a balance between value and accessibility.

In short, when people ask “What is an app?” or search for the apps definition, they’re referring to the powerful, flexible software tools that help simplify daily life, drive engagement, and support countless business and personal goals.

What Are Apps Used For?

Apps have become an essential part of our everyday lives, helping us stay connected, productive, entertained, and informed. But if you’ve ever found yourself wondering, “What are apps really used for?” or even typed “Are apps useful?” into a search bar, you’re not alone. Understanding the purpose and value of apps can help both users and businesses get the most from these powerful tools.

1. Productivity and Business Apps

One of the most common apps type is those designed to enhance productivity and streamline business operations. From project management tools like Trello and Asana to cloud storage apps like Google Drive and Dropbox, these mobile apps applications empower users to work more efficiently—anytime, anywhere.

Apps are used for:

• Managing teams and tasks
• Scheduling meetings and appointments
• Tracking time and performance
• Automating repetitive processes
• Accessing and editing documents on the go

2. Communication and Social Interaction Apps

In today’s fast-paced digital world, staying connected is crucial, and apps make that possible. Whether through messaging, video calls, or social media platforms, communication apps keep us in touch with family, friends, coworkers, and customers.

Examples include:

• WhatsApp, Telegram, Signal
• Zoom, Google Meet, Microsoft Teams
• Facebook, Instagram, LinkedIn

These tools make communication faster, more visual, and often more secure.

3. E-commerce and Online Shopping Apps

Retail has transformed with the rise of mobile shopping apps. Now, users can browse, buy, and track orders right from their smartphones. Apps like Amazon, Flipkart, and Etsy allow businesses to sell products to global audiences while offering customers a seamless shopping experience.

Apps help users:

• Browse and compare products
• Make secure online payments
• Track deliveries in real time
• Access exclusive deals and discounts

4. Health, Fitness, and Well-being Apps

Apps are also making a big impact in health and wellness. From tracking your daily steps and calories to scheduling doctor appointments or monitoring mental health, health-related apps are now a key part of self-care routines.

Popular types include:

• Fitness trackers like Fitbit and Strava
• Meditation and mindfulness apps like Headspace and Calm
• Telemedicine apps like Practo and Teladoc

5. Entertainment and Leisure Apps

Entertainment is another major reason apps are used. Whether you're binge-watching a show, playing games, or streaming music, apps provide instant access to countless sources of enjoyment.

Examples:

• Netflix, YouTube, Spotify
• Mobile games like Candy Crush, PUBG, and Clash of Clans
• Reading apps like Kindle and Audible

6. Education and E-learning Apps

The rise of e-learning apps has made it easier for users to learn new skills, languages, and subjects from virtually anywhere. These apps are transforming traditional education into an on-demand experience.

Popular uses include:

• Online courses (Coursera, Udemy)
• Language learning (Duolingo, Babbel)
• Student collaboration tools (Google Classroom, Khan Academy)

Why It Matters

So, what are apps used for? The short answer is—just about everything. Apps serve both personal and professional purposes, helping users get things done faster, easier, and more efficiently. No matter the apps type—mobile, web, or desktop—their core purpose remains the same: to add value through digital convenience.

Whether you're managing your business, relaxing after work, or learning a new skill, apps have become indispensable tools for modern living.

What Are the Types of Apps?

When trying to understand what is an app, it’s important to recognize that apps come in different forms, each designed for specific platforms, technologies, and user experiences. Knowing the various apps type will help you make informed decisions—whether you’re a developer planning a new project, a business owner wanting to launch a digital product, or simply curious about the world of applications.

Let’s explore the most common types of apps in detail:

1. Native Applications

Native apps are developed specifically for a particular operating system, such as iOS or Android. These apps are built using platform-specific programming languages—Swift or Objective-C for iOS, and Java or Kotlin for Android. Because they are tailored to one system, native apps offer the best performance, smoothest user experience, and full access to device hardware like cameras, GPS, accelerometers, and notifications.

Native apps need to be downloaded and installed from app stores such as the Apple App Store or Google Play Store. Examples include popular apps like Instagram, WhatsApp, and Uber.

2. Hybrid Applications

Hybrid apps combine elements of both native and web apps. They are built with web technologies such as HTML, CSS, and JavaScript but run inside a native container. This allows hybrid apps to work across multiple platforms—Android, iOS, and sometimes even desktop—with a single codebase. Hybrid apps are faster and more cost-effective to develop compared to building separate native apps for each OS.

Despite some limitations in performance compared to native apps, hybrid apps are ideal for businesses looking to quickly launch across platforms without sacrificing essential functionality.

3. Progressive Web Apps (PWAs)

Progressive Web Apps (PWAs) are a relatively newer type of app that combines the best features of web and mobile apps. These apps run in a browser but offer a user experience similar to native apps, including offline capabilities, push notifications, and fast load times. Since PWAs don’t require installation from an app store, users can simply access them via a URL.

PWAs are a smart choice for businesses aiming to provide app-like experiences without the hassle of app store approvals or downloads. Examples include Twitter Lite and Pinterest’s mobile site.

4. Web Applications

Web apps are applications that run entirely in a web browser and rely on an internet connection to function. Unlike PWAs, traditional web apps usually do not offer offline access or app-like interactions but are accessible on any device with a modern browser. Web apps are often used for productivity tools, e-commerce, or content management.

Familiar examples of web apps include Gmail, Google Docs, and Trello.

5. Desktop Applications

When people ask, “What is an app in the computer?”, they’re usually referring to desktop applications. These apps are installed directly on a computer’s operating system, such as Windows, macOS, or Linux. Desktop apps are generally more powerful and capable of handling complex tasks that may require significant system resources.

Examples include Microsoft Word, Adobe Photoshop, and Slack’s desktop client.

6. Enterprise Applications

Enterprise apps are specially designed applications that support the needs of large organizations. These apps focus on streamlining business processes, improving collaboration, and managing resources efficiently across departments. They often integrate with existing IT infrastructure and can be deployed on-premise or in the cloud.

Enterprise apps can include Customer Relationship Management (CRM) systems, Enterprise Resource Planning (ERP) software, supply chain management apps, and internal communication tools.

Because of their complexity and scale, enterprise apps require robust security, scalability, and customization to meet unique organizational requirements.

What is an App on a Computer?

When you hear the term “app”, most people immediately think of mobile applications on smartphones. However, the concept of an app extends well beyond mobile devices and plays a crucial role in desktop computing, too.

In the context of a computer, an app (short for application) is a software program designed to perform specific tasks or functions on a desktop or laptop operating system, such as Windows, macOS, or Linux. These apps help users accomplish a wide range of activities—from creating documents and editing photos to managing finances and communicating with others.

Key Characteristics of Computer Apps:

• Installed Software: Unlike web apps accessed through browsers, many desktop apps are installed directly on your computer's hard drive, giving you faster access and the ability to work offline.
• Powerful Functionality: Desktop apps often offer advanced features and greater processing power compared to mobile apps, making them ideal for resource-intensive tasks like video editing, graphic design, software development, and gaming.
• Variety of Applications: Computer apps cover a broad spectrum of uses, including productivity suites (e.g., Microsoft Office), creative software (e.g., Adobe Photoshop), communication tools (e.g., Skype), and utilities (e.g., antivirus software).
• User Interface: Desktop apps typically have interfaces designed for mouse and keyboard input, which can include complex menus, toolbars, and shortcuts tailored to enhance productivity.

Examples of Common Computer Apps

• Microsoft Word and Excel: Widely used for document creation and data analysis.
• Adobe Photoshop: A professional-grade tool for photo editing and graphic design.
• Google Chrome and Mozilla Firefox: Web browsers that also function as apps on your computer.
• Slack: A communication platform popular in workplaces.
• Spotify: Desktop app for music streaming.

How Computer Apps Differ from Mobile Apps

While both serve similar purposes—helping users perform tasks—desktop apps are optimized for larger screens, more powerful hardware, and different input methods compared to mobile apps. Additionally, desktop apps often support more complex operations and deeper integration with system resources.

What Are the Benefits of an App?

Understanding what is an app goes beyond just its definition or types — it’s equally important to know why apps have become indispensable in our daily lives and business strategies. Apps offer a wide range of benefits that can transform how individuals interact with technology and how businesses operate, engage customers, and grow.

Here are some of the key benefits of using apps:

1. Enhanced Accessibility and Convenience

Apps put powerful tools and services right at your fingertips. Whether it’s ordering food, managing your finances, or booking a ride, apps make everyday tasks faster and more convenient. With a mobile app, users can access your services anytime and anywhere, which significantly improves user engagement and satisfaction.

2. Improved User Experience

Apps are designed to deliver smooth, intuitive, and personalized experiences. Unlike websites that rely on browsers, apps can leverage device features such as GPS, camera, and push notifications to offer tailored interactions that keep users coming back.

3. Increased Customer Engagement

With features like push notifications, in-app messaging, and loyalty programs, apps provide businesses with direct channels to engage customers. This ongoing interaction helps build brand loyalty, encourages repeat business, and promotes new products or services effectively.

4. Greater Brand Visibility

Having an app on a user’s device means your brand is visible every time they unlock their phone. This constant presence strengthens brand recognition and keeps your business top-of-mind, which can lead to higher conversion rates and customer retention.

5. Streamlined Operations and Productivity

For businesses, apps can automate and streamline various processes such as inventory management, employee communication, and customer support. Enterprise apps, in particular, improve collaboration and workflow efficiency across departments, driving better overall productivity.

6. Competitive Advantage

In today’s competitive market, offering a dedicated app can set your business apart. Apps allow you to provide unique services or experiences that competitors without apps might not offer. This edge can be crucial for attracting and retaining customers.

7. Offline Functionality

Many apps offer features that work even without an internet connection. This capability ensures users can continue accessing important information or services regardless of connectivity, enhancing reliability and user satisfaction.

8. Data Collection and Analytics

Apps enable businesses to collect valuable user data such as preferences, behaviors, and feedback. This data helps companies make informed decisions, optimize marketing strategies, and improve product offerings to better meet customer needs.

9. Cost-Effective Marketing Channel

Compared to traditional advertising, apps provide a direct and cost-efficient way to reach your target audience. Through push notifications, special offers, and personalized content, you can engage users more effectively and at a lower cost.

What Is the Cost of App Development? (Basic Estimations)

If you’re wondering how much it costs to build an app, you’re not alone. App development costs can vary widely depending on several factors like the type of app, complexity, features, and the development approach you choose.

Understanding these costs upfront is essential whether you’re a startup founder, business owner, or developer planning your next project.

Factors Affecting App Development Costs

1. App Type and Complexity: A simple app with basic features, such as a calculator or a to-do list—usually costs much less than a complex app packed with advanced functionalities like real-time chat, social media integration, or payment processing. Native apps tend to be pricier because they require separate development efforts for iOS and Android platforms.

2. Design and User Experience: Custom, high-quality user interfaces and smooth user experiences require more time and resources, which increases costs. Conversely, apps that use standard templates or simpler designs tend to be more budget-friendly.

3. Features and Integrations: The number and complexity of features directly impact the cost. Apps that require GPS access, camera functionality, push notifications, or payment gateways typically require more development work. Integrating third-party APIs or developing complex backend services can also add to the expense.

4. Platform Choice: Building an app for just one platform (either iOS or Android) is less costly than developing for both. Cross-platform development tools can help reduce costs but might limit some native capabilities.

5. Development Team Location: Labor costs differ significantly by region. Hiring developers in countries with lower rates, such as India or Eastern Europe, often reduces the budget compared to hiring developers in the US or Western Europe. Deciding between outsourcing and in-house teams also affects overall expenses.

6. Testing and Maintenance: Quality assurance, testing across various devices and OS versions, and ongoing maintenance after launch all require additional investment. Regular updates and bug fixes are vital for long-term app success.

Estimated Cost Ranges

• Simple apps with minimal features generally cost between $10,000 and $30,000.
• Medium complexity apps with more sophisticated functionalities may range from $30,000 to $70,000.
• Complex apps with advanced features and integrations can easily exceed $70,000, sometimes reaching over $150,000.

Additional Expenses to Keep in Mind

Publishing your app on the Apple App Store or Google Play Store involves annual or one-time fees. Marketing and promotion to gain users after launch can also require a dedicated budget. Plus, backend infrastructure—like servers, databases, and cloud services—may lead to ongoing costs.

Want to reduce development costs? Platforms like FAB Builder let you generate app code automatically, speeding up development and saving money.

How FAB Builder Can Help You Save Cost of App

FAB Builder uses code generation technology to streamline development. By providing AI assistance, pre-built components, integrations, and a scalable infrastructure, FAB Builder helps reduce both the time and cost it takes to build an app, whether it’s a simple mobile app or a complex enterprise solution.

Real-World Examples of Apps

Apps have transformed the way we live, work, and communicate. From everyday conveniences to complex business solutions, apps are everywhere, making tasks easier, faster, and more enjoyable. Let’s explore some real-world examples of popular apps across different categories and how they impact users and industries.

1. Social Media Apps

Apps like Facebook, Instagram, and TikTok have revolutionized how we connect with others. These platforms allow users to share photos, videos, and messages instantly, fostering global communities and real-time interactions. Social media apps have become essential for personal communication, brand marketing, and even news dissemination.

2. E-Commerce Apps

Retail giants like Amazon and eBay offer mobile apps that let users shop anytime, anywhere. These apps provide seamless browsing, product recommendations, secure payment options, and order tracking, revolutionizing the shopping experience. Smaller businesses also leverage e-commerce apps to reach wider audiences and increase sales.

3. Productivity Apps

Tools such as Microsoft Office, Google Drive, and Trello empower users to work efficiently from any device. These productivity apps enable document creation, collaboration, task management, and cloud storage, supporting remote work and boosting productivity for individuals and teams worldwide.

4. Health and Fitness Apps

Apps like MyFitnessPal, Strava, and Headspace help users track workouts, monitor nutrition, and practice mindfulness. These mobile apps encourage healthier lifestyles by providing personalized plans, goal tracking, and community support.

5. Entertainment Apps

Streaming services like Netflix, Spotify, and YouTube have reshaped how we consume entertainment. These apps offer vast libraries of movies, music, and videos on-demand, accessible anytime through smartphones, tablets, and desktops.

6. Enterprise Apps

Businesses rely on enterprise apps like Salesforce, Slack, and SAP to manage operations, communication, and customer relationships. These applications are designed for scalability and security, helping companies streamline workflows, improve collaboration, and enhance customer service.

How to Create an App: A Step-by-Step Guide

Creating an app might seem complex, but with the right tools and a clear process, you can turn your idea into a fully functional application—whether you’re a startup founder, an enterprise leader, or a developer. Using FAB Builder’s powerful platform, the app-building journey becomes easier, faster, and more efficient.

Here’s a step-by-step roadmap to help you create your app from scratch to launch:

Step 1: Sign Up and Access FAB Builder

Start by visiting FAB Builder’s website and signing up for an account. This will give you access to the platform’s intuitive app-building environment designed to simplify development with AI-assisted tools and code generation.

Step 2: Describe Your App

Next, describe your app’s purpose, target audience, and core features using FAB Builder’s AI-powered entity creation. Just provide basic details such as your app’s name, the problem it solves, and the functionalities you want. This step helps the platform generate a tailored app structure suited to your needs.

Step 3: Choose Your Tech Stack

FAB Builder supports a range of popular, modern technologies for your app’s frontend, backend, and database layers. Choose from the following options to match your project requirements and expertise:

• Frontend: React.js, Angular, Vue.js
• Backend: Node.js, Java, .NET
• Database: MongoDB, PostgreSQL, MySQL

Selecting the right tech stack ensures your app is scalable, secure, and performs well.

Step 4: Define Your Data Model

Use FAB Builder’s visual data modeler to define the structure of your app’s data. This involves creating lists and fields that represent your app’s core information—whether that’s user profiles, product catalogs, or transaction records. You can use pre-built field types like text, numbers, and dates or customize fields to fit your unique requirements.

Step 5: Preview and Iterate

Before deployment, take advantage of FAB Builder’s live preview feature. This lets you interact with a working version of your app, test workflows, and evaluate the user interface. Use this stage to make improvements and adjustments until your app perfectly matches your vision.

Step 6: Deploy Your App

When you’re ready to go live, FAB Builder offers flexible deployment options:

• Cloud Deployment: One-click deployment to major cloud platforms like Google Cloud Platform (GCP), Amazon Web Services (AWS), or Microsoft Azure.
• Source Code Download: Download the fully generated source code and deploy it on platforms such as Vercel, Netlify, or your preferred hosting service.
• Containerization: Integrate with Docker for containerized deployment, making scaling and management easier.

Launch your app, start gathering user feedback, and begin growing your user base or business revenue.

Why Use FAB Builder for App Development?

FAB Builder’s low-code and AI-driven platform dramatically reduces development time and costs, enabling you to focus on your app’s core value rather than technical complexities. Whether you’re building a mobile app, a web application, or an enterprise system, FAB Builder makes app creation accessible to everyone, regardless of coding experience.

Conclusion

Apps have become an integral part of our digital lives, powering everything from social connections and entertainment to business operations and productivity. Understanding what an app is, the different types of apps, and their benefits helps you appreciate their impact and potential.

Whether you’re an individual, entrepreneur, or enterprise, building an app can open new opportunities to engage customers, streamline processes, and innovate your industry. With platforms like FAB Builder, creating powerful, scalable apps is more accessible than ever—no extensive coding required.

From defining your idea and selecting the right tech stack to deploying and maintaining your app, following a clear, structured process ensures success. Real-world examples demonstrate just how transformative apps can be when designed and built well.

Ready to bring your app idea to life? Explore FAB Builder today and take the first step toward creating impactful apps that drive growth and deliver value in 2025 and beyond.