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iOS & Android

Mobile apps people keep on their home screen

Native and cross-platform apps for Android and iOS - designed, built, integrated, and launched to the stores.

SwiftKotlinFlutterReact NativeFirebaseREST/GraphQL
active users4.8app rating60fpssmooth UI
2-in-1
platforms, one build
4.8/5
avg. app rating
60fps
smooth UI
100+
apps shipped

We build mobile apps that feel native, perform well, and are a pleasure to use - whether that's a consumer app, an internal tool, or the mobile half of a larger platform.

From UI/UX design through API integration and app store submission, we take care of the whole journey and stay on for updates afterwards.

What's included

  • Native Android (Kotlin/Java) and iOS (Swift) development
  • Cross-platform builds with Flutter or React Native
  • UI/UX design tailored to mobile patterns
  • API design and back-end integration
  • Push notifications, offline support, and in-app payments
  • App Store and Google Play submission and launch support

Tools & tech

SwiftKotlinFlutterReact NativeFirebaseREST/GraphQL

What you get

Design

Wireframes and a polished mobile UI.

Development

iOS and Android builds with a shared back-end.

Testing

Device testing and beta release.

Launch

Store submission and post-launch support.

Get a quote

Tell us about your project and we'll reply within 24 hours.

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Why Ecomsy

Everything you need, done properly

iOS & Android

Native-quality apps for both platforms from one codebase.

Smooth & fast

60fps interfaces with a focus on performance and polish.

Secure

Biometric auth, encryption, and safe data handling.

Connected

Real-time sync, push notifications, and API integrations.

Store-ready

We handle App Store and Play Store submission.

Built to scale

Backends that grow with your user base.

Ready to get started?

Tell us what you need and we will map out the path - design, build, and launch.

  1. iOS and Android from one codebaseCross-platform where it makes sense, native where it matters. 01Discuss this
  2. You own the app and the storesListings, keys and certificates registered in your name. 02Discuss this
  3. Analytics wired in before launchSo you know what users actually do from week one. 03Discuss this
  4. Post-launch support and updatesOS updates and store policy changes handled as they land. 04Discuss this
  5. Design and build in one teamScreens designed by people who know what ships cleanly. 05Discuss this
  6. Milestone pricing, agreed up frontApprove a written quote before anything begins. 06Discuss this