# Mobile: Native iOS and Android, and cross-platform apps.

URL: https://extra.dev/services/mobile

**Mobile apps built for every device**

Fast, reliable and secure mobile experiences that help businesses connect with their customers on both iOS and Android.

## The complete mobile experience

Mobile development brings together the interface people use, the capabilities of the device and the services that support the product. Our teams create native, cross-platform and hybrid applications for iOS and Android around the needs of each product.
From secure access, payments and subscriptions to data synchronisation, notifications and releases, the product is planned as a complete mobile service. This creates a consistent experience for users and a durable foundation for new features, more users and evolving platforms.

What this includes:
- **Native iOS & Android development**: Building applications specifically for iOS or Android, including their interfaces, functionality and platform conventions.
- **Cross-platform & hybrid development**: Developing applications with shared code across platforms, with adaptations for the experience and capabilities of each.
- **Backend & service integration**: Developing the services and data connections behind the app, including accounts, payments, subscriptions and data synchronisation.
- **Device & platform integration**: Connecting the app with device capabilities and operating system services, including cameras, location, Bluetooth and notifications.
- **App quality & security**: Testing and improving functionality, accessibility, performance, stability and the protection of user data.
- **Release & maintenance**: Managing distribution, updates and ongoing improvements, including modernisation of existing apps and support for evolving operating systems.

How we work:
- **Platform decisions based on product needs**: Native, cross-platform and hybrid approaches are assessed against the required experience, device capabilities and existing code. Implications for performance, maintenance and platform support are made clear when decisions are taken.
- **App behaviour tested in representative conditions**: Testing covers supported devices, operating-system versions and the conditions the app is expected to handle. This includes changing connectivity, interruptions, background activity, accessibility settings and the main tasks users need to complete.
- **Security and privacy considered throughout**: Authentication, permissions, data storage and communication with backend services are reviewed as the app is designed and built. Platform security controls are applied according to the sensitivity of the data.
- **Releases tested and monitored**: Test builds and app diagnostics provide evidence for each release. Compatibility, stability, distribution requirements and changes affecting existing users or their data are checked, while feedback guides subsequent improvements.

Stack: Native: Swift, SwiftUI, Kotlin, Jetpack Compose · Cross-platform: React Native, Expo, Flutter, Dart, Kotlin Multiplatform · Payments & subscriptions: StoreKit 2, Google Play Billing, RevenueCat, Stripe · Release & monitoring: Fastlane, EAS, TestFlight, Firebase, Sentry, PostHog.

Questions we get about this discipline:
- **Should we build native, cross-platform or hybrid apps?** That depends on the experience, device capabilities, existing code and maintenance needs. We assess those requirements and recommend an approach for the product, explaining the implications for performance, platform support and future development.
- **Can you take over or modernise an existing app?** Yes. We review the code, dependencies, stability, user experience and release process before recommending what to retain, improve or replace. Work can then be prioritised around the issues affecting users and future development.
- **Can you work with our existing backend?** Yes. We can build the mobile application against existing services and work with the team responsible for them. If the required services do not yet exist, backend development and integration can be included in the scope.
- **Do you handle app store submission and release?** We can prepare builds, support testing, manage submission and address issues raised during review. Distribution requirements and account access are considered early, since they can affect product and technical decisions.
- **What happens as iOS and Android change?** Supported devices and operating-system versions are reviewed as the product evolves. Ongoing maintenance can cover compatibility, security updates, platform policy changes and improvements informed by app diagnostics and user feedback.

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Published by Extra.dev (https://extra.dev), a software engineering team in Ljubljana, Slovenia.
Canonical page: https://extra.dev/services/mobile
Contact: hello@extra.dev · Replies within one working day
Site index for agents: https://extra.dev/llms.txt · Full text: https://extra.dev/llms-full.txt