Mobile application development for Android and iOS, from first idea to store launch

Mobile application development is a strategic decision that determines how users access a service, product or business process through the device they carry with them every day. A mobile application is not a website adapted to a smaller screen, it is a separate software system that uses device capabilities, from GPS and camera to biometric authentication and push notifications, and must function reliably under conditions of variable network connectivity, different operating system versions and diverse hardware configurations. Prolink has been developing mobile applications for Android and iOS for more than fifteen years, with a portfolio that spans central bank information platforms, government multilingual applications, volunteer management systems, nautical crew coordination tools, taxi and delivery applications, IoT and smart home solutions, e-learning platforms and consumer retail apps, alongside international projects for 57 Tech in London and Big Planet Media in Missouri. Delivering applications for institutions such as the Croatian National Bank and the Ministry of the Interior alongside commercial clients across different industries demonstrates the ability to handle projects with different security requirements, different regulatory constraints and fundamentally different user groups, which is the kind of experience that a generalist approach cannot replicate.

Android and iOS, two platforms with different requirements

Android and iOS are technically different platforms that require adaptation of the user interface, different approaches to testing and separate distribution processes through Google Play and Apple App Store. Android covers a larger share of the global market and offers greater development flexibility, but device fragmentation across manufacturers requires more extensive compatibility testing. iOS is a closed platform with less fragmentation and a stricter application validation process before publication, which extends the path to launch but ensures a more consistent user experience. Prolink develops applications natively or via the Ionic cross-platform framework, depending on project requirements, with the choice of approach based on an analysis of functional requirements, expected load and budget, because there is no universally correct solution that fits all projects.

Mobile application development process, from analysis to launch

Every project follows a structured development process that begins with an analysis of business needs, the target user group and functional requirements, because without clearly defined requirements the system architecture cannot be correctly established. Analysis is followed by a specification that defines screens, user flows, API models and data structure, then UX/UI prototyping that validates the logical flow of use before development begins. The development phase implements the frontend, backend services, API layers and business logic, while integrations with external systems are tested in parallel with development to identify problems while they are still inexpensive to resolve. Testing covers functional verification, security checks and performance testing across different devices and OS versions, and only after successful testing is the application prepared for publication through App Store and Google Play listing configuration.

 

Mobile application development phases

Technologies and development approaches

Prolink uses the Ionic framework for hybrid applications, enabling development that covers Android and iOS from a shared codebase, reducing development and maintenance costs without significant compromise on user experience for most types of applications. For projects requiring maximum performance, deep hardware integration or specific platform capabilities, native development is applied, providing full control over all aspects of the application. Unity 3D is used for applications involving 3D elements, interactive models or gaming components, covering AR solutions such as the application developed for the City Museum of Ilok. The choice of technology is not a stylistic preference but an architectural decision with long-term implications for performance, maintenance costs and system scalability.

Functional capabilities of mobile applications

The range of functionality a mobile application can support is determined by the business requirements of the project, not by technical limitations of the platform. User authentication can be standard login, biometric, via social networks or multi-factor, depending on security requirements. Push notifications enable direct communication with users without an intermediary, and their effectiveness depends on segmentation and automation built on backend data about user behaviour. Geolocation, maps and navigation are the foundation of delivery, taxi and tourism applications, while camera and scanner integration supports inventory, document scanning and AR experiences. Offline mode is critical for applications used without stable network connectivity, and real-time communication between users or between the application and server is the foundation of chat applications, ordering systems and real-time tracking platforms.

References across sectors

The mHNB application for the Croatian National Bank is a project Prolink has maintained and upgraded over the long term, including migration to the latest versions of the Ionic framework to keep the application compatible and performant across all supported devices. The Ministry of the Interior multilingual application is an information platform available in multiple languages, including Arabic and other non-Latin scripts, designed to inform foreign nationals about regulations and information relevant to their stay in Croatia. The Skipper4you crew management application covers complete management of maritime personnel, from skippers and hostesses to chefs on board, with functionality for job notifications, messaging and document upload that must be available at sea with limited network connectivity. The Croatian Red Cross application supports volunteer registration, team management with leadership roles and gamification elements that increase volunteer engagement through points and reward systems. Taxi and delivery applications developed for multiple operators cover real-time driver tracking, automated dispatch and in-app payment, while IoT applications connect mobile interfaces with smart home and industrial device management systems.

Push notifications as communication infrastructure

Push notifications are the most effective mobile communication channel because they reach the user directly on the lock screen without requiring the user to actively open the application or check email. Basic implementation that sends the same messages to all users is straightforward to develop, but the real value of push notifications is realised through segmentation of users by demographic data or behaviour, automation of sending based on triggers such as incomplete orders, personalisation of content according to user profile and A/B testing that identifies which messages produce higher open and conversion rates. Prolink implements push notifications as part of the broader communication architecture of the application because integration with backend user data determines how relevant the messages are and therefore how effective they are.

Administration interface as a necessary part of the system

Every mobile application that manages users, content or push notifications requires an administration interface that is not visible to the end user but is essential for day-to-day operational work. Without administration it is not possible to add content, manage user accounts, send push notifications or track analytics that show how users are using the application. Prolink defines and estimates the administration interface in the first phase of the project because retroactive addition disrupts architecture and increases costs, and provides the client with visibility into all relevant data without requiring technical knowledge.

Maintenance and long-term stability

Apple and Google regularly release new operating system versions that can disrupt applications that are not updated, and app stores periodically change technical requirements that all active applications must meet. Security patches, compatibility with new OS versions, performance optimisation and new feature development based on user feedback are ongoing costs that must be planned alongside the initial development investment. Prolink treats long-term technical support as a standard part of the engagement rather than an additional service, because an application that is not maintained gradually becomes a security risk and technical debt that becomes more expensive to resolve over time than if maintenance had been regular from the start.

Why clients choose Prolink for mobile application development

Clients who choose Prolink for mobile application development typically come with projects that require a partner who understands not just the technical requirements but the operational and business context behind them. Experience delivering applications for financial institutions, government bodies, humanitarian organisations, logistics companies and consumer-facing services across different industries and regulatory environments means Prolink approaches every project with the sector-specific understanding that a generalist approach cannot provide. For clients outside Croatia, Prolink offers the practical advantages of an EU-based development partner, GDPR compliance from the ground up, Central European timezone, communication in English and German, and development costs substantially more competitive than Western European agencies without compromise on delivery standards. If you are considering mobile application development and want a partner who understands both the technical architecture and the business logic behind a digital product, get in touch and a conversation about scope and approach commits you to nothing.

 

Questions about mobile application development

What is the difference between a native and a cross-platform application?

A native application is developed separately for each platform, providing maximum performance and full access to device capabilities, but requiring greater development effort and cost. Cross-platform development via the Ionic framework uses a shared codebase for Android and iOS, reducing costs and delivery time with acceptable performance for most types of applications. The choice between approaches depends on functional requirements and project budget.

Does the application need to work without internet?

Offline mode can be implemented for applications used in conditions without stable network connectivity, with data synchronisation when a connection becomes available. Implementing offline mode requires additional data architecture planning and increases development complexity. The relevance of offline mode depends on the context of use and the type of data the application handles.

How is the application published on the App Store and Google Play?

Prolink treats application publication on distribution platforms as a standard part of the development process, including preparation of the store listing, icons, screenshots and descriptive texts. Apple App Store conducts manual validation that can take several days, while Google Play validation typically takes less time. Both processes require developer accounts registered in the name of the client.

Can an existing application be upgraded or migrated?

Existing applications can be upgraded with new functionality or migrated to newer technologies, such as migration to a newer version of the Ionic framework. The scope of upgrade or migration depends on the state of the existing architecture and the requirements the new version must meet. Sometimes a complete reconstruction is more cost-effective than upgrading an outdated architecture.

Does the application support multiple languages?

Multilingual support is standard functionality that Prolink implements with translation management within the administration interface. Multilingual support is planned from the start of the project because retroactive addition requires significantly more work and disrupts the architecture.

How is user data protected in the application?

Data protection is implemented through encryption of communication between the application and the server, secure storage of sensitive data on the device, authentication protocols and access control according to user roles. Applications processing personal data of users from the EU are subject to GDPR regulation. Prolink defines security requirements in the specification phase because retroactive implementation of security protocols disrupts architecture and increases costs.

What happens after the application is published?

After launch comes a phase of monitoring performance and user behaviour through analytics tools, collecting user feedback and planning upgrades that respond to identified needs. Apple and Google regularly release new OS versions that require application updates, and security patches must be applied promptly. Prolink treats the post-launch phase as a continuous development cycle, not as the end of the project.