Cross-platform mobile application development
Cross-platform mobile app development is suitable for projects that require a single product for both iOS and Android without maintaining two completely independent codebases. Core business logic, API interaction, authorization, catalog, user account, and many other features are developed within a single project, while platform differences are addressed separately where required by Android or iOS.
What is cross-platform mobile app development?
This approach is often chosen for MVPs, online stores, delivery services, corporate systems, FinTech products, and apps with user accounts. The Seo-Gen team designs the architecture, UX/UI, backend, and mobile components as a single product, so that after the initial release, the app can be developed without constantly duplicating the same changes.
Cross-platform app development doesn't automatically mean any project will be cheaper or faster than native development. Savings depend on the functionality, the number of platform integrations, performance requirements, and how much code can be shared.
Before starting development, we analyze the task, determine the required functionality, and select the appropriate stack. After that, we can assess the scope of work and decide whether a cross-platform architecture is justified for a specific product.
Cross-platform mobile development involves creating an app that is released for multiple operating systems based on a common project. This most commonly applies to Android and iOS. Developers use React Native, Flutter, Kotlin Multiplatform, .NET MAUI, or another approach that allows for reuse of a significant portion of the business logic and interface.
However, the app is still built and tested separately for each operating system. iOS and Android have different system permissions, publishing rules, background process behavior, payment mechanisms, and user interface features. Therefore, high-quality cross-platform mobile app development always includes testing the product's behavior on both platforms.
How does a unified code base work?
A shared codebase typically contains business logic, server-side API interactions, data models, forms, authorization, navigation, and a significant portion of the user interface. Changes to this logic are made once, after which they are integrated into both the Android and iOS app builds.
Separate platform-specific code is added where specific operating system features are required. This could include the camera, Bluetooth, NFC, geolocation, Apple Pay, Google Pay, push notifications, or background processing. This approach preserves the benefits of shared code and doesn't limit the app to the shared layer's capabilities.
What is the difference between a cross-platform app and a hybrid app?
The terms hybrid and cross-platform are often used interchangeably, although they technically describe different approaches. A hybrid app is traditionally built around web technologies and runs the interface within the system WebView, while modern cross-platform frameworks can use their own rendering or interact with native platform components.
Cross-platform web app development shouldn't be lumped together with mobile app development. A web app runs in a browser environment, while a mobile product is installed on a device, accesses operating system features, and is distributed through the App Store or Google Play.
What is included in the development service?
Cross-platform mobile app development services can cover the entire work cycle, from idea analysis to app release. The specific scope of work depends on whether the client approaches with a new concept, a ready-made design, an existing backend, or an already working mobile product.
The full Seo-Gen cycle includes the following tasks:
- Analytics and Discovery help capture user tasks, business requirements, platforms, and required integrations.
- Technical design defines the application architecture, backend, API, database, and system interactions.
- UX/UI design creates user scenarios, prototypes, designs, and interface states.
- Mobile development involves shared code, platform modules, and integration with device system functions.
- The backend and API are developed together with the mobile part if the client does not yet have a ready-made server infrastructure.
- QA includes functional, platform, and regression testing before releasing new builds.
- Publishing covers preparing the app and getting it through the App Store and Google Play submission process.
- Support includes fixes, dependency updates, and further development of the product after release.
Before the estimate, it is determined which of these stages have already been completed on the client's side. This ensures that unnecessary work is not included in the project.
I don't see cross-platform development as an automatic replacement for native. I recommend it when a business needs to launch iOS and Android simultaneously, avoid maintaining two completely independent codebases, and develop the product more quickly after release. If an app is performance-critical, requires complex graphics, or requires deep integration with operating system capabilities, it's important to first compare the architectural limitations of cross-platform and native development, and then choose between React Native, Flutter, or the native stack.
How do we develop cross-platform applications?
Development begins with the business objective, not the choice of programming language. First, it's important to understand who will use the app, what actions the user performs, and which systems need to exchange data with the mobile client.
The project is then broken down into functional blocks and technical components. This order helps determine which parts can be shared, where native code is required, and which features have the greatest impact on the budget.
Task Analysis and Discovery
Discovery gathers requirements, user scenarios, constraints, and goals for the first version of the product. The team examines the client's existing systems, API format, user roles, and required integrations.
For a new project, MVP features and subsequent version capabilities are defined separately. This helps avoid overloading the first build with secondary features and more accurately estimates development timelines.
Architectural design
The architecture includes a mobile client, a backend, a REST API or other data exchange interface, a database, and external services. Authorization, token storage, access rights, error handling, and scaling are all designed separately.
At this stage, the boundary between the shared and platform-specific parts of the app is also determined. If a feature requires its own native module, this is immediately included in the architecture and the estimate.
UX/UI design
Shared code doesn't mean completely identical interface behavior on both operating systems. Android and iOS users are accustomed to different navigation patterns, system elements, and gestures, so these differences are taken into account in the UX/UI.
First, a prototype of the main scenarios is created, followed by the design and interface states. The team designs loading, errors, blank screens, action confirmations, and handling of long user data in advance.
Selecting technology
After capturing the requirements, React Native, Flutter, Kotlin Multiplatform, .NET MAUI, or native development are compared. The choice depends on the functionality, existing business stack, interface requirements, and third-party SDKs.
A cross-platform language for mobile app development isn't chosen separately from the framework and architecture. The language is a consequence of the technical decision: TypeScript for React Native, Dart for Flutter, Kotlin for Kotlin Multiplatform, or C# for .NET MAUI.
Application development
The mobile team implements the interface, business logic, backend integrations, and system functions for the device. In parallel, backend developers create the API, administrative processes, and server logic if the product doesn't yet have a ready-made server side.
The work is divided into small functional stages. After each stage, a real-world scenario can be tested, rather than waiting for the entire system to be completed before the first full test.
Testing on iOS and Android
The app is tested on various screen sizes, current operating system versions, and physical devices. Permissions, unstable network conditions, authorization, notifications, payments, deep links, and restoring the app from background mode are all tested.
Platform-specific functionality receives special attention. A bug that doesn't appear on Android may only appear on a specific version of iOS, so testing one platform doesn't replace full QA on both builds.
Publishing on the App Store and Google Play
Before release, production builds, icons, screenshots, descriptions, and store support data are prepared. Requirements for permissions, privacy, and third-party SDK usage are also checked.
After submission, the app undergoes review by Apple and Google. If the store requires changes to the description, settings, or a specific feature, the team makes the necessary changes and resubmits the build.
Support and development
After launch, work begins on actual bugs, analytics, and user feedback. Dependencies, SDKs, analytics tools, and parts of the app affected by new mobile operating system versions are updated.
Product development is based on business priorities. A new feature is first designed within the shared architecture, after which the team determines whether it can be fully implemented in shared code or whether an additional platform component is required.
What we actually did
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How long does development take?
The timeframe depends on the number of user scenarios, the readiness of the design and backend, the number of integrations, and testing requirements. Therefore, the same tech stack can yield completely different timelines for a small MVP and a complex enterprise system.
A small MVP typically goes from prototype to first release more quickly, as the team limits the initial version to core features. A medium-complexity project requires more time for integrations, user roles, payments, analytics, and regression testing.
Complex products additionally include multiple external systems, multi-level access rights, real-time functions, or custom native modules. In such projects, deadlines are determined after decomposition, and the work is broken down into successive releases.
Cross-platform mobile apps can be built faster than two completely independent apps only when a significant portion of the logic remains shared. Therefore, it's better to tie the deadline to the actual architecture, rather than the word "cross-platform" itself.
How much does it cost to develop a cross-platform mobile app?
Cost can't be accurately determined based on the number of screens alone. Two visually similar apps can differ significantly in their backend, integrations, user roles, payment scenarios, and security requirements.
The estimate is particularly influenced by functionality, UX/UI complexity, backend, third-party APIs, payments, maps, real-time, AI functions, the number of user roles, and the need to write custom native modules.
Typically the calculation is carried out after decomposition:
- The team first captures the required user scenarios and separates the features of the first version from subsequent releases.
- Each function is then broken down into mobile, server, design, and testing parts, taking into account integrations.
- Platform functions that cannot be fully implemented through the shared framework are evaluated separately.
- After this, the total development scope is compiled and the release order is determined.
This calculation is more accurate than a fixed price per app, as it shows which features drive the budget. Before starting a project, the MVP and subsequent development can be assessed separately.
Provide a product description or a completed specification. We'll analyze the functionality, propose an architecture, and prepare a preliminary development estimate.
Why order cross-platform app development from Seo-Gen?
The project begins with the architecture and user task. This approach helps to identify critical integrations, the boundaries of the shared codebase, and features that require separate development for Android or iOS.
We don't tie every project to a single framework. React Native, Flutter, Kotlin Multiplatform, .NET MAUI, and native all solve different problems, so the technology is selected after a technical analysis of the product.
We work with the product from architecture to release: The team can join at the idea stage, at a completed prototype, or at an existing app stage. For a new project, we sequentially go through requirements, architecture, design, development, QA, and publication preparation. If part of the system has already been created, we first validate the current architecture and integrations. This helps preserve working components and avoid rewriting the product just to change the tech stack.
One project for iOS and Android
Android iOS cross-platform app development is built around a common product logic that both app versions share. Platform-specific components are added only where the APIs or operating system requirements differ.
This approach simplifies the synchronization of new features between the two app stores. The user experience is adapted to the familiar Android and iOS scenarios, rather than being mechanically copied between platforms.
We select the stack according to the task, not according to the developer's habits
Framework selection begins with product requirements, existing systems, and future development. If a project requires React Native, the team won't choose Flutter just because it was used in a previous project.
The same principle applies in reverse. If requirements indicate that separate native development is safer and simpler, this decision should be made before programming begins.
Considering product development after MVP
The first version rarely contains all future functionality, so the architecture must take future releases into account. We proactively consider planned integrations, new roles, catalog expansion, geography, and potential workload growth.
This is especially important for an MVP, which quickly moves into active development after validating demand. An overly simplified initial architecture can limit the next stage within just a few months.
We design the backend, API, and integrations along with the application.
The mobile client relies on the server in almost every business scenario. Therefore, API structure, authorization, errors, data loading, and access rights are considered alongside the app interface.
If the backend already exists, we test its API before active mobile development begins. Early identification of limitations reduces the amount of rework during the integration phase.
Testing real user scenarios
QA tests not individual buttons, but rather sequences of user actions: registration, order placement, payment, error recovery, and re-login. These scenarios are tested on Android and iOS.
We also test for weak network conditions, system permission denials, app minimization, and other real-world conditions. These are the kinds of situations that often cause errors that aren't visible during a regular screen check.
Describe your idea, existing product, or technical specifications. We'll evaluate the architecture and propose a development approach for Android and iOS, without locking you into a single tech stack.
Submit your idea description, mockups, or existing technical specifications to Seo-Gen. We'll analyze the project, determine a suitable architecture for Android and iOS, and prepare a development estimate.
Answers to your questions
What is cross-platform mobile app development?
Cross-platform development is an approach in which an Android and iOS app is built on a common technology base. Much of the business logic and interface are reused, while the necessary platform features are integrated separately.
This approach is used for business applications, services, online stores, delivery systems, and corporate systems. The specific share of shared code depends on the chosen framework and the product requirements.
How is cross-platform development different from native development?
With native development, Android and iOS have separate codebases and typically require different mobile developers. Cross-platform development preserves the common core of the project and reduces the amount of duplicate development.
Native architecture provides maximum control over a specific operating system. Cross-platform architecture is advantageous when most features work equally well on both platforms.
Which is better for a cross-platform app – Flutter or React Native?
Both frameworks are suitable for commercial mobile products. React Native uses JavaScript or TypeScript and is often convenient for teams with React experience, while Flutter runs on Dart and provides its own controlled UI building mechanism.
The choice is made after evaluating the UI, third-party SDKs, integrations, and the team's competencies. There is no single best technology for all types of applications.
Is it possible to create one app for both iOS and Android?
Yes, this is exactly the problem iOS and Android cross-platform development solves. The team creates a shared project, which is then used to create and test separate builds for Android and iOS.
Platform-specific code is added to the project as needed. This ensures that a single codebase doesn't interfere with the use of features that vary across operating systems.
Will a cross-platform app run slower than a native one?
For most typical business applications, a modern cross-platform framework provides sufficient performance. Catalogs, dashboards, chats, maps, payments, and API integrations typically don't require a fully native architecture just for speed.
The difference becomes more important in graphics-intensive environments, complex data processing, and extensive hardware interactions. It's best to test such features with a technical prototype before selecting the final architecture.
How much does it cost to develop a cross-platform app?
The price depends on the functionality, backend, design, integrations, number of user roles, and platform-specific features. Choosing React Native or Flutter alone isn't enough to quote an accurate price without a product description.
After decomposition, the team receives a list of features and an estimate for each block. A separate MVP can be calculated, allowing the team to release the main version first and then move minor features to subsequent releases.
How long does it take to develop an app for iOS and Android?
The timeframe is determined by the complexity of the product and the readiness of the source materials. A small MVP and an app with multiple roles, payments, real-time support, and numerous integrations require different amounts of design and testing.
Once the functional structure is established, the work can be divided into stages and releases. This schedule shows the actual development sequence better than an overall timeline without a technical estimate.
Is it possible to migrate an existing native app to React Native or Flutter?
Yes, but the migration method depends on the current product's architecture. Sometimes it makes sense to gradually migrate individual modules, while other times maintaining legacy code makes new development faster and more secure.
Before making a decision, it's necessary to check the backend, dependencies, existing native code, and the quality of the documentation. Only after an audit can the cost of a gradual migration be compared with a complete rewrite of the mobile client.
Can C# be used for cross-platform mobile development?
Yes, for new C# projects, you can consider .NET MAUI. It's being developed within the .NET ecosystem and is designed for developing applications for multiple platforms with a common code base.
Older materials on cross-platform mobile app development in C# often describe Xamarin. For a new product, Xamarin is no longer recommended as its support has ended.
Is cross-platform development suitable for MVP?
Yes, if the first version needs to run on both Android and iOS and its core features are the same for both platforms. A shared codebase helps avoid duplicating major development efforts during the product hypothesis testing phase.
At the same time, an MVP still requires a proper architecture. Temporary solutions that cannot be expanded after the initial release can quickly increase the cost of further development.
Cross-platform mobile app development makes sense when the product needs to run on both Android and iOS, and most of the user scenarios and business logic are the same. React Native, Flutter, Kotlin Multiplatform, and .NET MAUI offer different implementation options, so the choice of technology begins with the architecture and requirements of the specific application.
Before launching, it's important to check the functionality, backend, third-party integrations, performance requirements, and the volume of platform-specific code. This analysis demonstrates whether cross-platform software development will reduce rework and remain convenient for product development after the initial release.
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More on: Cross-platform mobile application development
When is cross-platform development suitable for business?
Cross-platform app development is especially useful when both mobile platforms share the same business logic and a similar set of features. In such a project, there's no point in implementing the catalog, user account, order processing, server data exchange, and other common scenarios twice.
When choosing a technology, consider the future product architecture. Sometimes the first version fits well with cross-platform development, but future plans call for complex hardware or system functionality. It's best to define such requirements before development, as subsequent architecture changes are more expensive.
MVP and new product launch
For an MVP, it's important to quickly validate key user scenarios and gather data after a live launch. Building a cross-platform app in this case means focusing the budget on the product's functionality rather than duplicating the same development work for two operating systems.
The first version may include registration, user account, catalog, search, payments, notifications, and basic analytics. After launch, the team collects actual data on user behavior and develops the most popular features, rather than trying to create the fullest possible set of capabilities upfront.
E-commerce, delivery, and service applications
Online stores and service apps typically share much of the same business logic across Android and iOS. The catalog, product card, shopping cart, order history, bonus system, online payment, and user profile all fit well within a common codebase.
Delivery apps also utilize maps, geolocation, order statuses, and push notifications. These features require separate testing on devices, but typically don't require completely splitting development into two independent teams.
Enterprise applications
Enterprise cross-platform development is suitable for internal dashboards, CRM interfaces, logistics systems, mobile workstations, and employee apps. Such products often work with an existing backend, and the mobile component becomes a convenient interface to corporate data.
A shared codebase simplifies the synchronized release of new features for Android and iPhone users. Security, access rights, action logging, and integration with internal systems should be designed at the architecture level, rather than added after the interface is finalized.
When might cross-platform not be suitable?
Native development may be more efficient for projects with heavy 3D graphics, complex image processing, non-standard hardware interactions, or critical performance requirements. A similar situation arises when an application is deeply dependent on the unique capabilities of a single operating system.
Separate native apps can also be justified if Android and iOS require significantly different interface architecture and functionality. In such cases, trying to maintain a common code base at all costs creates technical limitations rather than actual savings.
Benefits of cross-platform development
The main advantage of cross-platform application development is code reuse between application versions. The team spends less time building identical business logic twice in parallel, and fixes and new features can be made in the shared project.
However, the benefits need to be assessed on a product-by-product basis. If half the functionality requires separate native modules, the benefits diminish. The more truly shared logic, the more the cross-platform approach impacts development timelines and subsequent support.
One team for iOS and Android
Instead of two independent teams, you can use one core mobile team responsible for the app on both platforms. This simplifies communication, sprint planning, and synchronization of features between Android and iOS.
Individual specialists can still be involved in working with native modules or publishing. The difference is that the product isn't split into two independent projects with their own business logic and separate development cycles.
Code reuse
Reusable code reduces repetitive development. Whenever an order calculation rule, the structure of the user account, or the API logic changes, the majority of the changes can be made in a single code layer.
This also reduces the risk that the same feature will behave differently simply because two teams implemented it independently. Platform differences are preserved where they are needed by the user or dictated by operating system requirements.
Faster product launch
Cross-platform mobile application development often reduces the time it takes to release two mobile versions. The team creates the shared functionality once and simultaneously tests it on Android and iOS.
The benefit is especially noticeable in projects with a large amount of standard business logic. If the application requires numerous platform-specific integrations, the timeframe should be calculated separately after technical decomposition.
Synchronous updates
The shared project simplifies the release of features for both platforms simultaneously. Android and iOS users receive the same changes without a long delay between versions, as long as the release passes app store approval as usual.
This process is convenient for products that are updated regularly. It makes it easier for the team to maintain a unified roadmap, test a single business logic, and keep features at parity between the two operating systems.
Easier support
When most bugs are located in shared code, fixes can be made only once. This reduces the amount of repetitive work during support and simplifies product development after the initial release.
Platform bugs are still possible. Updates to Android, iOS, SDKs, and third-party libraries require regular testing, so a unified codebase doesn't eliminate technical support for each mobile platform.
Cross-platform or native development – which to choose?
Cross-platform vs. native development should be compared based on product requirements, not a universal technology ranking. For an app with a catalog, dashboard, orders, and API integrations, a shared codebase often offers practical benefits. For a project that is heavily dependent on device hardware, the choice may be different.
Native vs. cross-platform mobile development also differs in team organization. A native approach involves separate implementations for Android and iOS, while a cross-platform project strives to retain as much common logic as possible without compromising the user experience.
| Criterion | Cross-platform | Native |
|---|---|---|
| Code base | Most of the logic is shared between both platforms. | The core code is created separately for each OS. |
| Team | Typically there is one main mobile team operating. | Separate Android and iOS specialists are needed. |
| Launch of two platforms | Common logic reduces the amount of repetitive work. | Two versions are being developed in parallel in separate streams. |
| Performance | Suitable for most business applications with proper architecture. | Provides maximum control over the capabilities of a specific OS. |
| System APIs | Available via framework, plugins or native modules. | Used directly by platform tools. |
| Support | Common features are updated in one project. | Changes need to be synchronized between the two codebases. |
A simplified selection guide looks like this:
| Criterion | Recommended approach | Applicability rate |
|---|---|---|
| Standard business logic, API, dashboards | Cross-platform | 100% |
| MVP for Android and iOS at once | Cross-platform | 100% |
| A large number of common functions | Cross-platform | 90% |
| Deep system integrations | Native | 80% |
| Heavy graphics and maximum optimization | Native | 100% |
This chart provides a general guideline and does not replace a technical assessment of the project. The final choice depends on the architecture, integrations, interface requirements, and development plans of the application.
When is it better to choose cross-platform?
Cross-platform is suitable when Android and iOS need to solve similar problems and work with a common server. This is a typical option for e-commerce, delivery, appointment services, financial dashboards, SaaS, and enterprise products.
This approach is also convenient for a company that plans to regularly release identical features on both platforms. In this case, cross-platform development services cover a single cycle of design, development, testing, and ongoing support.
When is it better to choose native?
Native development is worth considering when performance is critical, complex graphics, and non-standard Bluetooth, camera, or other device features. Separate development may also be justified if the product effectively has different features on Android and iOS.
This decision should be made before selecting a framework. If you first define a technology and then try to adapt the product requirements to it, the team may encounter limitations during development.
Is it possible to combine cross-platform and native code?
Yes, modern cross-platform projects can use native modules for specific functions. The core business logic remains shared, and the native code is responsible only for specific integrations or system features.
This approach is often used for payments, Bluetooth, NFC, background processes, or new operating system APIs. Cross-platform native app development therefore doesn't always require a hard choice between a fully shared or fully native architecture.
Technologies for developing cross-platform applications
Cross-platform mobile development tools vary in programming languages, interface design principles, and methods of interacting with native APIs. Therefore, a cross-platform development framework for iOS and Android is selected based on product analysis, not just technology popularity.
For most commercial projects, React Native and Flutter are considered. Kotlin Multiplatform is suitable for teams that need to share business logic and retain more native components, while .NET MAUI remains an option for projects with C# and the Microsoft ecosystem.
| Technology | Primary language | Typical scenario |
|---|---|---|
| React Native | JavaScript / TypeScript | Business applications, services, and projects with a React team. |
| Flutter | Dart | Applications with a complex unified UI for Android and iOS. |
| Kotlin Multiplatform | Kotlin | Common business logic while maintaining a native approach to platforms. |
| .NET MAUI | C# | Projects from companies working with .NET and the Microsoft stack. |
React Native
React Native cross-platform app development uses JavaScript or TypeScript and is familiar to developers working with React. The framework is suitable for apps with dashboards, catalogs, social features, payments, maps, and numerous API integrations.
React Native cross-platform development allows for the inclusion of native modules if the framework's overall functionality is insufficient. When choosing, consider the quality of the libraries used, the frequency of their updates, and the amount of native platform code the project will require.
Flutter
Flutter uses the Dart language and its own UI rendering engine. The team gains extensive control over the app's appearance and can create a consistent UI that works predictably across different mobile devices.
The framework is often chosen for new products where the mobile interface is designed from scratch. Before implementation, the necessary SDKs, payment systems, maps, analytics, and other integrations are checked to determine the availability of supported packages.
Kotlin Multiplatform
Kotlin Multiplatform allows you to extract common business logic into shared code while preserving the native portion of the application for specific platforms. This approach is attractive to projects that require a high degree of logic reuse without completely switching to a single UI framework.
The resulting architecture is more flexible, but it requires a team with the appropriate technical expertise. The separation of the common and platform components must be planned in advance, otherwise the project will gradually accumulate a lot of duplicate code.
.NET MAUI and C#
C# cross-platform mobile development today is primarily associated with .NET MAUI. This technology enables the use of C# and .NET to create applications for multiple platforms and is suitable for companies that already have specialists and infrastructure in the Microsoft ecosystem.
Searches for "cross-platform mobile development C#" and "Microsoft cross-platform mobile development" still often lead to materials about Xamarin. For new projects, keep in mind that Xamarin has reached the end of its lifecycle, so older technical guides should be checked for relevance.
What happened to Xamarin?
Xamarin has long been used for mobile app development in C#, so older articles and documentation continue to feature prominently in search results. Support for the platform has ended, and Microsoft has moved this approach forward in .NET MAUI.
When planning a new app, there's no point in using Xamarin as the primary technology stack. If a business already uses an older Xamarin app, first assess its dependencies, architecture, and the scope of work required to migrate to a supported technology.
Swift and cross-platform development
Swift for cross-platform development appears in search queries, but Swift remains the primary language for modern development in the Apple ecosystem. For an iOS-only project, this stack provides direct access to the platform's capabilities.
For a simultaneous Android and iOS launch, other cross-platform app development technologies are typically considered. Using Swift in a separate platform component is possible if the shared framework requires its own module for iPhone or iPad functionality.
React Native or Flutter – which one to choose for your project?
Both frameworks are suitable for building apps for Android and iOS, so there's no clear winner between them. The choice depends on the existing tech stack, UI requirements, integrations, team competencies, and the product's planned development after launch.
React Native is often convenient for companies already working with React, JavaScript, and TypeScript. Flutter provides its own UI system and is well suited for products that require a controlled visual experience across devices.
When comparing, we check several parameters:
- If a company already has a strong React team, React Native reduces the barrier to entry and simplifies the exchange of experience between web and mobile developers.
- If a project involves a large number of custom UI components, Flutter gives the team a predictable rendering environment.
- If specific SDKs are needed, the support for each integration and the quality of existing libraries are first checked.
- If some functions need to be written natively, this volume is taken into account at the architecture and estimate stage.
After selecting a framework, the team records its version, key dependencies, and update rules. This reduces the risk that the application will become tied to unsupported libraries within a year.
What features can be implemented in a cross-platform application?
Modern cross-platform mobile development tools cover most of the functionality of a typical business app. Limitations often arise not from the approach itself, but from the specific third-party SDK, operating system requirements, or the chosen architecture.
Critical functions are tested separately before development. This technical analysis is especially necessary for payments, Bluetooth, background geolocation, medical equipment, and other integrations with stricter requirements.
Authorization and user account
The app supports registration via email or phone number, login via an external provider, access recovery, and multi-factor authentication. After logging in, users gain access to their profile, activity history, and personal data.
Authorization logic is typically located in the app's shared part and operates through a backend API. Platform differences arise when using Apple Sign In, biometrics, or special credential storage mechanisms.
Online payment
A cross-platform app can work with payment gateways, banking SDKs, Apple Pay, Google Pay, and app store in-app payments. The specific mechanism depends on the type of product or service and the platform's requirements.
The payment scenario is tested separately for iOS and Android, as store rules and available tools differ. The server-side component must independently confirm payments and maintain the correct transaction status.
Push notifications
Push notifications are used for order statuses, messages, reminders, promotions, and system events. The app receives the device ID and associates it with the user through the backend.
Android and iOS each have their own permissions and notification delivery mechanisms, so the permission request interface is designed with each platform in mind. The message's behavior is also tested when the app is open, closed, or running in the background.
Geolocation and maps
The app can determine the user's location, display objects on a map, create routes, and transmit coordinates to the server. This functionality is needed for delivery, taxi, logistics, branch locators, and field services.
Background geolocation requirements are significantly stricter than one-time location determination. Battery consumption, system limitations, and app store publishing rules must be taken into account.
Camera and file handling
The app lets you take photos, scan documents, select images from your gallery, and upload files to the server. These features are used in marketplaces, banking apps, insurance, and corporate systems.
The team handles system permissions separately, as well as situations where the user denies access to the camera or storage. The interface should explain how to restore access through the device settings.
Chats and real-time features
WebSockets, push, or other real-time mechanisms are used for chats, delivery statuses, and live data updates. The server architecture here influences the results just as much as the mobile framework.
Provisions must be made for connection restoration, message delivery after temporary network outages, and state synchronization between devices. These scenarios are tested before the product's public launch.
CRM, ERP, and API integrations
The mobile app can interact with CRM, ERP, warehouse systems, payment services, and other business infrastructure via an API. If the existing system doesn't have a suitable API, a separate integration layer may be required.
Before connecting, data format, authorization, request limits, and error handling are checked. This reduces the risk that an external service issue will disrupt the entire mobile app.
Analytics
The app integrates product and technical analytics: events, screens, funnels, install sources, and errors. The toolkit is selected based on business objectives and user data processing requirements.
After launch, analytics helps determine where users drop out of a flow and which features are actually used. This data becomes the basis for future product releases, rather than the team's assumptions.