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Services  /  Android & iOS Apps
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.

Get a quote See our work
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.

Free consultation · No obligation
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Thanks - your request has been received. We'll reply within 24 hours.

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.

How we deliver

From first call to launch

The five stages every Android & iOS App Development project moves through - you see and approve the work at each one.

  1. 01

    Discovery

    The people using the app, the jobs they need done, and what the first release must include.

  2. 02

    UX & flows

    User journeys and wireframes for every key screen, agreed before visual design.

  3. 03

    UI design

    A clickable design for iOS and Android, built on a consistent component system.

  4. 04

    Build & test

    Development in milestones, with working builds on real devices at each stage.

  5. 05

    Store launch & support

    App Store and Google Play submission handled, then updates, fixes and new features.

Related work

Work we have shipped

Real projects from our case studies.

All case studies
ubuild.in
UBuild - live site

UBuild

Construction technology

A platform connecting homeowners, contractors and suppliers - discovery, business profiles and project expenses in one app.

Read the case study
toptipper.co
TopTipper - live site

TopTipper

Payments

Cashless tipping by QR code - so service workers stop losing tips to "sorry, no cash".

Read the case study
digitaltruthapp.com
The Digital Truth App - live site

The Digital Truth App

Personal and leadership development

A platform for creating, tracking and challenging personal, professional and wellness goals - for individuals and groups.

Read the case study
FAQ

Android & iOS App Development: questions, answered

Something else? Ask us directly →

Both. Cross-platform (for example Flutter or React Native) is usually faster and cheaper for one codebase on iOS and Android; native makes sense for heavy device features. We recommend after scoping.

Yes - several of our app projects were UI and UX design for a team building it in-house.

We prepare listings, screenshots and builds, and handle the review process with you.

Yes. Most apps need an API and an admin area for your team, and we build those alongside the app.

We support the app with fixes and OS updates, and plan the next features from real usage.

Ready to get started?

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

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Related services

UI/UX DesignSoftware DevelopmentCustom-Coded Websites
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  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
Reviews

Rated by our clients on Trustpilot

Rated 3.7/ 5 Based on 1 review Trustpilot
1 month ago

I'm Alex, Business Developer at SprintOps, a project management and operations solutions company. We contracted ECOMSY for advanced web and app development, as well as a custom ERP system for our business, and the entire experience exceeded our expectations.

Alex D.,
Review us onTrustpilot