Mobile Application: What is It?

What is a Mobile Application?

A mobile application is software specifically designed to run on mobile devices such as smartphones and tablets. Unlike a conventional website, a mobile application can leverage the device's hardware capabilities (camera, GPS, accelerometer, push notifications, local storage) to deliver a rich and performant user experience. Mobile applications are distributed through dedicated platforms, primarily Apple's App Store and the Google Play Store.

The mobile application market is enormous: in 2024, there are over 5 million applications available on the stores, and users spend an average of 4 to 5 hours per day on their mobile apps. For businesses, a mobile application can serve as a sales channel, an internal productivity tool, a customer service platform, or a loyalty driver. The choice of technical approach (native, cross-platform, or PWA) depends on functional requirements, budget, and company strategy.

Why Mobile Applications Matter

Mobile has become the primary digital touchpoint for the majority of users. Companies that ignore the mobile channel miss significant growth and customer engagement opportunities.

• Mobile ubiquity: Over 60% of global web traffic comes from mobile devices. A strong mobile presence has become indispensable for reaching users where they are.
• Higher engagement: Mobile applications deliver engagement rates 3 to 5 times higher than mobile websites, thanks to push notifications, personalisation, and offline access.
• Native capabilities: Access to device sensors (GPS, camera, NFC, biometrics) enables creating experiences impossible to replicate in a web browser.
• Performance: Mobile applications offer superior loading times and responsiveness compared to websites, thanks to local resource caching and native optimisation.
• Loyalty channel: The permanent presence of the app icon on the home screen and push notifications make the application a powerful loyalty tool.

How It Works

Mobile application development begins with choosing the technical approach, which determines the project's costs, timelines, and functional possibilities. Three major approaches coexist today.

Native development means creating a specific application for each platform: Swift/SwiftUI for iOS, Kotlin/Jetpack Compose for Android. This approach offers the best performance and complete access to native APIs but requires maintaining two separate codebases, doubling development and maintenance costs.

Cross-platform development enables sharing a single codebase between iOS and Android. React Native (JavaScript/TypeScript) and Flutter (Dart) are the two leading frameworks. This approach reduces costs by 30 to 50% while delivering near-native performance. At Kern-IT, we recommend React Native for cross-platform projects, thanks to its synergy with our React web expertise.

Progressive Web Apps (PWA) are advanced web applications that install like native apps from the browser. They offer offline functionality, push notifications (with some limitations on iOS), and do not require store submission. PWAs are ideal for budget-constrained projects or cases where off-store distribution is an advantage.

Concrete Example

Consider a Brussels restaurant chain wanting to offer an online ordering and loyalty application to its customers. The app must allow menu browsing, ordering, online payment, loyalty point accumulation, and personalised promotions via push notifications.

At Kern-IT, we analyse the requirements and recommend a React Native approach. The app leverages push notifications for promotions, geolocation to display the nearest restaurant, and local storage for offline menu browsing. 85% of the code is shared between iOS and Android. The Django backend exposes a REST API for order management, catalogue, and loyalty programme. The application is delivered in 3 months and published simultaneously on the App Store and Google Play Store.

Implementation

1. Define the mobile strategy: Identify business objectives (acquisition, loyalty, internal productivity), target audience, and priority features.
2. Choose the technical approach: Native for maximum performance and deep integrations, cross-platform (React Native) for the best cost-to-coverage ratio, PWA for limited budgets or off-store distribution.
3. Design the user experience: Create wireframes and mockups following each platform's guidelines (Human Interface Guidelines for iOS, Material Design for Android).
4. Develop iteratively: Build the application sprint by sprint using agile methodology, with regular demonstrations on real devices.
5. Test rigorously: Unit tests, integration tests, end-to-end tests, and tests on a representative range of physical devices.
6. Publish to the stores: Prepare store listings (screenshots, descriptions, keywords), submit to validation processes, and optimise discoverability (ASO).
7. Measure and iterate: Analyse usage metrics (retention, engagement, crash rate) and iterate on features based on real data.

Associated Technologies and Tools

• React Native: Meta's cross-platform framework for developing iOS and Android applications from a JavaScript/TypeScript codebase.
• Flutter: Google's cross-platform framework using Dart, with a custom graphics rendering engine.
• Swift / Kotlin: Native languages for iOS and Android development respectively.
• Firebase: Backend services suite (auth, notifications, analytics, crashlytics) suited for mobile development.
• Fastlane: Build, test, and store deployment automation for mobile apps.
• App Store Connect / Google Play Console: Application management and publishing platforms for their respective stores.

Conclusion

Mobile applications have become an essential strategic channel for businesses of all sizes. The choice between native, cross-platform, or PWA development depends on your objectives, budget, and technical constraints. At Kern-IT, we guide our Belgian and European clients through this strategic decision by recommending the approach that maximises delivered value: React Native for most cross-platform projects, PWA for web-first scenarios, and native only when platform-specific integrations warrant it. The essential thing is to place the user at the centre of the thinking and deliver a mobile experience that creates real value.