Custom iOS and Android
mobile app development
Mobile app agency in Paris. We build high-performance iOS and Android applications, native or cross-platform. App Store and Play Store publishing included, pixel-perfect UX.
iOS and Android app development
Mobile app development is at the heart of our expertise. Whether you need a native iOS app in Swift, an Android app in Kotlin, or a cross-platform solution with React Native or Flutter, our team masters the full range of mobile technologies.
Every mobile application we develop is designed to deliver a smooth and intuitive user experience. We pay meticulous attention to performance, accessibility, and compatibility across different screen sizes and OS versions.
Our mobile app agency in Paris supports both startups launching their first product and established businesses looking to digitize their processes through a dedicated mobile application. From UX/UI design to store deployment, we manage the entire lifecycle of your app.
What we deliver
- Native iOS applications (Swift, SwiftUI)
- Native Android applications (Kotlin, Jetpack Compose)
- Cross-platform apps (React Native, Flutter)
- API and mobile backend integration
- App Store and Google Play Store publishing
- Push notifications and real-time messaging
- Biometric and secure authentication
- Offline mode and data synchronization
Technologies we use
- iOS: Swift, SwiftUI, UIKit, Xcode
- Android: Kotlin, Jetpack Compose, Android Studio
- Cross-platform: React Native, Flutter, Expo
- Mobile backend: Firebase, Supabase, REST/GraphQL APIs
- Mobile CI/CD: Fastlane, GitHub Actions, TestFlight
- Testing: XCTest, Espresso, Detox, Appium
Our process
- Scoping: Define scope, user personas, user stories
- UX/UI Design: Wireframes, interactive prototypes, mobile design system
- Development: 2-week sprints, regular test builds
- Testing: Unit tests, integration tests, beta testing
- Publishing: Store submission, ASO (App Store Optimization)
- Maintenance: OS updates, bug fixes, new features
Frequently asked questions about mobile development
Native or cross-platform: which should I choose?
The choice depends on your goals. A native app (Swift for iOS, Kotlin for Android) offers the best performance and full access to device features. Cross-platform (React Native, Flutter) allows sharing up to 90% of code between iOS and Android, reducing costs and timelines. We recommend the best approach based on your specific project.
How long does it take to develop a mobile app?
An MVP (Minimum Viable Product) is typically ready in 6 to 10 weeks. A full-featured application takes between 3 and 6 months. Our agile approach lets you test the first features quickly and iterate based on user feedback.
Do you handle store publishing?
Yes, we manage the entire publishing process on the App Store (Apple) and Google Play Store. This includes creating store listings, screenshots, writing ASO-optimized descriptions, managing certificates, and submitting for review.
How do you ensure app quality?
We use a combination of automated tests (unit, integration, UI) and manual testing on various real devices. Before each release, a beta testing phase validates the application with real users via TestFlight (iOS) and Google Play test channels.
Related services
Complement your mobile project with our other expertise:
- Web development -- Companion web app for your mobile app
- AI integration -- Chatbot and AI features in your app
- Software development -- Backend and APIs for your application
- IT consulting -- Technology choices and architecture
Have a mobile app idea?
Let's discuss your iOS or Android app project. Free quote and response within 24h.