Software, web and mobile development company · Working worldwide since 2008

Android App Development

Android Apps Built for Every Device

Native Kotlin and Jetpack Compose apps tuned for real device fragmentation, tested to survive Play review, and built to actually get used. WebNX Global Services has been shipping software since 2008, working with clients around the world, including the US, UK, Canada and India.

  • Kotlin & Compose
  • All Devices
  • Play Store Ready
  • Material Design

The cost of a weak Android app

Is your Android app failing your users?

Android's device diversity punishes shortcuts more than any other platform. If any of these sound familiar, native Android development is the fix.

06 reasons Android apps get uninstalled or rejected
  1. 01

    An app that only works on the phone you tested it on

    Android spans thousands of device and chip combinations running different OS versions. Test on one phone and ship, and the rest of your users inherit every bug you missed. We build and test against real device fragmentation, not a single reference handset.

  2. 02

    Lag and battery drain get an app uninstalled fast

    Android users notice a sluggish, battery-hungry app within minutes, and they act on it immediately. Native Kotlin, tuned properly, stays smooth and respects the battery across every device tier, from budget to flagship.

  3. 03

    Play Store rejections that stall your launch

    Google Play's policies on permissions, data handling and content shift constantly and get enforced strictly. We build against current policy from day one, so the app clears review and stays published.

  4. 04

    An interface that feels like a port, not an Android app

    Android users know Material Design on sight, and an app that ignores it feels foreign the moment it opens. We build on Material 3 so the app feels like it genuinely belongs on the platform.

  5. 05

    Security and permission mistakes that fail review

    Android's permission model and security expectations are unforgiving. We implement secure storage, scoped storage and least-privilege permissions, so the app passes review and actually protects its users.

  6. 06

    An app quietly falling behind each Android release

    Every Android version changes APIs and raises minimum target requirements, and Google enforces them without exception. We keep target levels current so the app stays publishable and stable release after release.

Who we work with

Industries we serve

We have built Android apps for retail, finance, logistics and on-demand businesses. We learn your users and their devices before we build anything for them.

Retail & Ecommerce
FinTech & Banking
Health & Fitness
Logistics & Delivery
Education
Startups
On-demand
Enterprise
Social & Community
Field & Industrial

What we build

Our Android app development services

From a focused phone app to a multi-device build with deep Google integration, every Android app is native, tested widely and engineered to perform.

Native Android App Development

Android apps built in Kotlin and Jetpack Compose, engineered for performance and a genuinely native Material feel across the whole device range.

Material Design UI/UX

Interface design built to Material 3 standards, so the app looks and behaves exactly the way Android users already expect it to.

Multi-device & Tablet Support

Apps that adapt cleanly across phones, tablets, foldables and every screen density, from one properly architected codebase.

Widgets & App Shortcuts

Home screen widgets, app shortcuts and quick-settings tiles that put your app's core actions one tap away.

Android Backend & APIs

The APIs, database, authentication and push infrastructure your Android app needs, built to fit its exact requirements.

Google Services Integration

Google Pay, Maps, Firebase, ML Kit, Sign-In and the wider Google ecosystem, integrated cleanly and kept current.

Java to Kotlin Migration

Move a legacy Java codebase to modern Kotlin and Jetpack Compose, or modernize an aging app, without losing your existing users.

Performance Optimization

Profiling and tuning of startup time, memory, battery and rendering, so the app feels fast on budget hardware and flagships alike.

Android Testing & QA

Testing across a real spread of Android devices and OS versions, backed by Espresso automation and Play beta tracks.

Play Store Submission

We prepare the listing, assets and metadata, handle submission, and navigate Play review and policy until the app is live.

Play Store Optimization

Title, keyword, screenshot and listing optimization so the app actually gets discovered and installed on Google Play.

Android Maintenance & Support

Target-level updates, device support, crash monitoring and new features that keep the app current and stable long after launch.

Why choose us

Android development done the right way

Anyone can build for one phone. We build native Android that works across the whole device range, clears Play policy, and stays current as Android evolves. These are the standards behind every app we ship.

Start your project
  • Kotlin and Compose, not a wrapper

    We build native Android in modern Kotlin and Jetpack Compose, never a web view dressed up as an app. Users can feel the difference immediately.

  • Fragmentation is our problem to solve

    We test across a genuinely wide spread of devices, screen sizes and OS versions, so the app works for your whole audience, not just one phone.

  • Material Design, done properly

    Apps built to Material 3 feel native from the first tap, clear review faster and tend to earn better ratings on Google Play.

  • Performance tuned across every tier

    We tune for budget devices and flagships alike, so the app stays fast and battery-friendly no matter what your users are holding.

  • We know how to navigate Play policy

    Google Play policy is strict and it keeps moving. We build against the current rules so the app gets approved and stays live.

  • Security and permissions, handled properly

    Secure and scoped storage, least-privilege permissions and correct data handling, exactly the way Android and Google expect them.

  • Tested on real hardware, not just an emulator

    We test on actual Android devices across versions and form factors before anything ships to your users.

  • Kept current with every Android release

    We hold your app to current target levels and APIs, so it keeps publishing and running well as Android moves forward.

How we work

Our Android app development process

Eight clear stages, each with something you can see and sign off on. No black box between idea and the Play Store.

  1. 01

    Discovery

    We map your users, target devices and the Android features that actually matter for this app.

  2. 02

    Design

    Material 3 UI designed and prototyped, signed off by your team before a line of Kotlin gets written.

  3. 03

    Architecture

    App architecture, backend and Google services integrations planned before development starts.

  4. 04

    Development

    Clean Kotlin and Compose built in weekly sprints, with an internal test build to try at every stage.

  5. 05

    Testing

    Real-device testing across the Android range and OS versions, backed by automated test coverage.

  6. 06

    Submission

    We prepare the Play listing and shepherd the app through review and policy until it clears.

  7. 07

    Launch & ASO

    A monitored launch paired with Play Store optimization to drive real discovery and installs.

  8. 08

    Support

    Target-level updates, monitoring and new features added well after launch day.

What is included

One-phone testing is not enough

The difference between an app that works everywhere and one that crashes on half of devices is everything below. Here is what comes standard with us.

What you get Budget build WebNX
Native Kotlin / Compose build
Material Design 3 compliance
Multi-device & version testing
Google services integration
Battery & performance tuning
Play Store submission handled
Security & permission compliance
Basic responsive layout
Analytics & crash reporting
Target-level maintenance

Client words

Trusted by teams that ship on Android

Our old app ran fine on the developer phone and crashed everywhere else. They rebuilt it in Kotlin and tested it across real devices, and crash-free sessions jumped from 92% to 99.8%. Our Play rating finally recovered along with it.

Founder Delivery startup, United States

They cut through Google Play's financial-app policy that had us stuck for months. The app was approved, the security review came back clean, and Google Pay integration works flawlessly. It was clear they knew the platform inside out.

Head of Product FinTech, United Kingdom

The app runs smoothly on the cheap rugged devices our drivers carry in the field, which is exactly what we needed from it. Offline mode and battery life have been excellent, and every Android update has been handled before it ever reached us.

CTO Logistics company, Canada

Built with proven tools

Our Android technology stack

We build with current Android frameworks and tooling so your app is modern and maintainable for years.

  • Kotlin
  • Jetpack Compose
  • Android SDK
  • Coroutines
  • Room
  • Hilt
  • Retrofit
  • Firebase
  • Espresso
  • Material 3
  • Gradle
  • Play Console

Questions, answered

Android app development FAQs

How much does it cost to build an Android app?

The cost depends on the app's features, design, backend and device requirements. A focused app is simpler, while complex apps with custom backends and deep integrations require more development. Every project is scoped and quoted individually.

How long does Android app development take?

A focused Android app typically takes ten to eighteen weeks from design to the Play Store. Larger, more complex apps run longer. You see designs early and a test build every week, so you can try the app as it comes together rather than waiting until the end.

Native Kotlin or cross-platform for Android?

Native Kotlin gives the best performance, the truest Android feel, and immediate access to new platform features, which makes it the right call when Android is your priority or the app is demanding. Cross-platform frameworks like React Native or Flutter are more cost-effective if you need Android and iOS together. We advise based on what actually matters for your project.

How do you handle Android device fragmentation?

We design responsive layouts, set sensible minimum and target SDK levels, and test across a real spread of devices, screen sizes, densities and OS versions, so the app works across the Android ecosystem instead of just the phone it was built on.

Do you handle Play Store submission?

Yes. We prepare your Play listing, assets and metadata, handle submission, and manage Google Play review and policy, including resolving rejections, so the app gets approved and stays published.

Can you integrate Google Pay, Maps and Firebase?

Yes. We integrate Google Pay, Maps, Firebase, ML Kit, Google Sign-In, push notifications and the wider Google ecosystem, wherever your app actually needs them.

Do you design the app or only build it?

Both. We provide Android UI/UX design following Material Design 3, from wireframes through to a polished, prototyped interface, or we build from designs you already have.

Can you build the backend for my Android app?

Yes. We build the APIs, database, authentication and push infrastructure your app needs, or integrate cleanly with a backend and services you already run.

Can you modernize my existing Android app?

Yes. We take over existing apps, migrate legacy Java to Kotlin, modernize to Jetpack Compose, and add new features, all while preserving your current users and ratings.

Will the app support tablets and foldables?

Yes, if you want it to. We build adaptive layouts that work well across phones, tablets and foldables from a single codebase.

How do you keep the app working after Android updates?

Google enforces minimum target SDK levels and changes APIs with every release. On a maintenance plan, we keep your app on current targets and test it against new versions, so it stays publishable and stable as Android moves forward.

What happens after launch?

Every project includes a handover and a warranty window. Most clients move onto a maintenance plan covering target-level updates, monitoring, crash fixes and new features, so the app stays current well past launch day.

Ready to build an Android app that actually holds up?

Tell us what you want to build. You will get a straight answer on scope, cost and timeline, usually within one business day.