Services

Mobile app development services for iOS and Android

Appstus builds cross-platform mobile applications with Flutter and React Native, designs mobile interfaces, connects apps to backend systems, and supports products after launch.

These services work together as one mobile product practice. Most projects combine development, design, integration, and ongoing support in different proportions depending on what you need.

Core service

Cross-platform mobile app development

The foundation of Appstus. We build mobile applications that target iOS and Android through a shared cross-platform codebase.

Cross-platform development is a practical way to reach both major mobile platforms without running two separate native projects. Appstus uses Flutter and React Native to deliver apps designed for real phone use, connected to the services your product depends on, and structured for ongoing improvement.

One product vision across iOS and Android
Shared codebase with platform-aware UI decisions
Structured releases from first version to launch

Technology

Flutter app development

Appstus uses Flutter to build polished cross-platform mobile apps with consistent UI and strong performance on iOS and Android.

When Flutter fits the product, Appstus uses it to move quickly on interface work while keeping one codebase for both platforms. The focus stays on your app goals, not framework theory.

Custom mobile interfaces with Flutter
iOS and Android delivery from one codebase
Feature development, refinements, and release support

Technology

React Native app development

Appstus also builds mobile apps with React Native when it is the right match for the product, team, or existing codebase.

React Native is part of the Appstus stack for cross-platform delivery. We use it to build mobile features, connect to APIs, and ship apps that feel at home on both iOS and Android.

Cross-platform apps with React Native
Integration with existing JavaScript-based systems where relevant
Iterative feature delivery and maintenance

Platforms

iOS and Android app development

Appstus develops mobile applications for both iOS and Android using Flutter and React Native.

Your users expect a reliable app on their platform of choice. Appstus builds for both iOS and Android through cross-platform development, with attention to platform conventions, store requirements, and mobile performance.

Apps designed for iPhone, iPad, and Android devices
Cross-platform builds rather than separate Swift or Kotlin codebases
Launch preparation for App Store and Google Play

Design

Mobile app UI/UX design

Interface design for mobile apps, including flows, screens, states, and developer-ready UI direction.

Mobile apps live or die on clarity. Appstus designs interfaces around real tasks: screen structure, navigation, touch-friendly controls, loading and error states, and layouts that work on phone screens.

User flows and screen architecture
Mobile UI design and interaction states
Design systems and developer-ready specifications

Integration

Backend and API integration

Connect mobile apps to the data, authentication, and third-party services they need to function.

Most apps are not standalone. Appstus integrates mobile clients with REST APIs, authentication flows, and third-party services so your interface reflects real product data.

REST API integration
Authentication and account flows
Third-party service connections

Support

App maintenance and ongoing support

Keep your app stable, compatible, and improving after launch.

Launch is not the end. Appstus helps with bug fixes, dependency updates, compatibility adjustments, API changes, and planned feature improvements so the app stays useful over time.

Bug fixes and stability improvements
Dependency and compatibility updates
Feature enhancements and API-related changes

Not sure which services you need?

Describe your app and we will suggest a sensible starting scope.

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