Android app development for the platform reaching billions of devices.
Hoop Interactive builds native Android apps in Kotlin and Jetpack Compose, tested across the phones, tablets, and OS versions your actual users run, not just one emulator.
What is Android app development?
Android app development is the process of building applications for Android phones, tablets, and wearables using Kotlin, Google's official programming language for the platform, and Jetpack Compose, the modern framework for building the interface. A native app compiles directly to code the device runs, giving it full access to hardware, background processing, and system features.
Android runs on far more device shapes and screen sizes than any other mobile platform — from budget phones to foldables to tablets, across manufacturers including Samsung, Google, and dozens of others. That range is Android's biggest strength and its biggest engineering challenge: a well-built Android app needs to look and work correctly across a device matrix, not just one reference screen size.
- Kotlin + Compose
- Google’s current language and UI toolkit, not a wrapper.
- Adaptive layouts
- Phone, tablet, and foldable handled from one codebase.
- Real device matrix
- QA across manufacturers, screen sizes, and OS versions.
- Submission handled
- Listing, data-safety declarations, and signed bundle managed.
Native, cross-platform, or PWA?
Three ways to reach Android users — and what each one trades away.
| Approach | What it is | Best fit |
|---|---|---|
| Native Android (Kotlin) | Built directly for Android, with full hardware and API access. | Apps needing top performance, background processing, or day-one access to new Android features. |
| Cross-platform (React Native, Flutter) | One codebase shared across iOS and Android. | Apps that need both platforms fast, with moderate performance needs. |
| Progressive Web App | A website that behaves like an app, with no Play Store listing required. | Simple tools that don't need deep device integration. |
Deciding how to build for Android.
What native buys you on the world's largest mobile platform, and when cross-platform is the better call.
Why native matters for Android specifically
Android holds roughly 70% of the global mobile market, which makes it the platform of choice for reaching users outside the US, UK, and Japan. Native Kotlin apps handle background tasks, widgets, and notifications more reliably than cross-platform apps, and get access to new Android features from Google the day they ship, not months later through a compatibility layer.
Native vs. cross-platform: which do you need?
Build native Android if performance, background processing, or deep integration with Android-specific features drives your product. Build cross-platform if you need iOS and Android launched together on a tighter budget and your app's performance needs are moderate.
Why build your app natively on Android?
Native Kotlin development gives you the reliability and Google Play visibility that a cross-platform wrapper can't fully match, especially once your app runs on real, fragmented hardware.
Compiles to native code
No cross-platform translation layer sitting between your app and the device.
Same-day access to new APIs
New Android features and Jetpack libraries are usable as soon as Google ships them.
Reliable background work
Background tasks, widgets, and notifications behave predictably across manufacturers.
Material Design compliance
A familiar, trusted feel that matches platform conventions across devices.
Adapts to every form factor
Phones, tablets, and foldables handled cleanly through Jetpack Compose.
The largest global reach
Roughly 70% market share, and the dominant platform in most emerging markets.
Android services we offer.
We scope the engagement around your product's actual state — new build, migration, or an existing app that needs work.
Phone app development
Native apps built in Kotlin and Jetpack Compose, designed around Google's Material Design guidelines.
Tablet & foldable apps
Adaptive layouts that adjust to larger screens and foldable form factors from a shared codebase.
Wear OS apps
Companion or standalone smartwatch apps for notifications, fitness tracking, and quick interactions.
Java to Kotlin migration
Rebuilding legacy Java codebases in Kotlin module by module, without pausing feature development.
Jetpack Compose modernization
Migrating older XML-based UI to Jetpack Compose for faster iteration and easier maintenance.
Play Store optimization & submission
Store listing, screenshots, and a signed app bundle prepared and submitted, with review feedback handled for you.
Signs you need Android development help.
Four situations send most founders and product leads to us for Android work.
- 01
Your app breaks on certain devices
Crash reports or bad reviews cluster around specific manufacturers, screen sizes, or Android versions.
- 02
You need global or emerging-market reach
Your target users live in regions where Android dominates the mobile market, and an iOS-only app misses most of them.
- 03
Background tasks or notifications are unreliable
A cross-platform build drops background sync or notifications on certain manufacturers' battery-optimization settings.
- 04
A legacy Java app needs modernizing
Your current codebase is hard to hire for and slow to update, and needs a path to Kotlin and Jetpack Compose.
Common Android development mistakes we help you avoid.
These five mistakes account for most of the crash-prone or slow-to-launch Android apps we get asked to fix.
Testing only on the emulator
CriticalEmulators miss manufacturer-specific quirks and real battery-optimization behavior. We test on a real device matrix before every release.
Ignoring Material Design guidelines
HighInterfaces that don't follow platform conventions feel foreign to Android users and hurt store conversion. We design against Material Design from day one.
Underestimating fragmentation testing
CriticalTeams budget for one screen size and get surprised by layout bugs across dozens of device shapes. We scope fragmentation testing into the plan up front.
Rushing Play Store listing prep
HighIncomplete data-safety declarations or unclear screenshots slow down Google Play review. We prepare submission materials as a dedicated step.
Poor permission and notification strategy
MediumApps that request every permission on first launch get uninstalled fast. We request access only when the feature needs it, with clear context.
How we build your Android app.
Six stages, from first call to a live Play Store listing. We work in weekly sprints with a demo every Friday.
Discovery & feature scoping
We define your core user, the features that matter, and which device types the app actually needs to support.
2–3 weeks · DiscoveryUI/UX design (Material Design)
We design the interface against Google's Material Design standards, so it feels native from the first screen.
2–3 weeks · DesignKotlin & Jetpack Compose development
We build in one-week sprints with a working demo every Friday, on real devices, not only the emulator.
4–28 weeks · DevelopmentQA across the device matrix
We test on a representative set of physical devices covering screen sizes, manufacturers, and OS versions.
2–3 weeks · QAPlay Store submission
We prepare the store listing, screenshots, and a signed app bundle, then submit and respond to any review feedback.
1–2 weeks · SubmissionLaunch & post-launch support
We monitor crash reports and reviews after launch and hand over a documented, commented codebase.
Ongoing · SupportAndroid app development cost and timeline.
Three factors drive the price: screen count, backend requirements, and device-matrix testing scope. The one-time $25 Google Play Developer fee is billed separately by Google.
- Investment
- $15,000–$40,000
- Timeline
- 2–4 months
- Screens
- 5–10, one workflow
- Included
- Auth & local storage
- Integrations
- 1–2 third-party
- Investment
- $40,000–$140,000
- Timeline
- 4–8 months
- Scope
- Backend, login, payments
- Data
- API-based sync
- Integrations
- 3–6 third-party
- Investment
- $140,000–$300,000+
- Timeline
- 8–14 months
- Features
- Real-time, complex logic
- QA
- Extended device matrix
- Compliance
- HIPAA · PCI DSS
The technology behind your Android app.
Google's native tools, chosen for performance and long-term platform support.
Kotlin
Firebase
Node.js (backend)
GitHub ActionsWays to work with us.
Pick the model that fits your project and team. All four include weekly demos and full code ownership.
Fixed-Scope Project
A defined feature set, timeline, and price agreed before we start. You know the exact cost up front.
Best for fixed budgetsDedicated Team
Android engineers and a designer working as an extension of your team through launch and beyond.
Best for ongoing productsStaff Augmentation
A senior Android developer added to your existing team to close a skills gap or add build capacity.
Best for existing teamsMaintenance Retainer
Ongoing Android version updates, bug fixes, and feature work for an app already live, billed monthly.
Best for live appsEvery Android build comes complete.
No hidden gaps. Each engagement includes everything you need to launch and maintain the app.
- Feature scoping
- A clear screen list and technical plan before we write code.
- Material Design UI
- An interface designed against Google's Material Design guidelines.
- Native Kotlin development
- Full-stack app code built for performance from the first commit.
- Device-matrix testing
- QA on physical devices across screen sizes and OS versions.
- Data-safety compliance
- Play Store data-safety declarations completed accurately before submission.
- Play Store submission
- Store listing, screenshots, and a signed app bundle prepared and submitted.
- Crash & analytics setup
- Monitoring wired in before launch, not added after problems appear.
- Documented handover
- Clean, commented code and a repository you own outright.
Android apps we build across every sector.
The process stays the same. The core workflow we scope changes by industry.
Fintech
Secure payment, budgeting, and banking apps with biometric auth.
Ecommerce & Retail
Shopping apps with fast checkout and push-driven engagement.
Health & Fitness
Tracking, coaching, and wellness apps built for background sync.
Logistics & Delivery
Driver and dispatch apps built for reliable background location tracking.
Media & Entertainment
Streaming, content, and social apps built for smooth scrolling.
Travel & Hospitality
Booking and itinerary apps with offline access and notifications.
Education
Course and learning apps with offline access and progress tracking.
SaaS & Productivity
Companion apps extending a web platform to Android devices.
Explore more software services.
Android app development is one of twelve engineering areas we cover, under Mobile Apps.
Mobile App Development
Native and cross-platform apps across both major platforms.
ExploreiOS App Development
Native Swift and SwiftUI builds for iPhone, iPad, and Apple Watch.
ExploreReact Native Development
One codebase shipping to iOS and Android together.
ExploreFlutter Development
Google's cross-platform toolkit for natively compiled apps.
ExploreMVP Development
A lean first build that tests your idea with real users in weeks.
ExploreWeb Design & UX
Interface and user-journey design for products people return to.
ExploreAPI & Integrations
REST and GraphQL backends your app consumes.
ExploreNode.js Development
Scalable backends and real-time features behind mobile apps.
ExploreAndroid app development questions
The questions founders and product leads ask us most before starting an Android build.
Native Android development performs better for apps that need deep hardware access, background processing, or the fastest possible speed, since Kotlin compiles directly to code the device runs. Cross-platform tools such as React Native or Flutter work well when you need iOS and Android from one codebase and performance requirements are moderate.
Android app development costs $15,000 to $300,000 or more, depending on complexity. A basic app costs $15,000 to $40,000, a mid-complexity app with backend and payments costs $40,000 to $140,000, and a complex or enterprise app costs $140,000 to $300,000 or more.
Building an Android app takes 2 to 14 months or more. A basic app takes 2 to 4 months, a mid-complexity app takes 4 to 8 months, and a complex or enterprise app takes 8 to 14 months or longer.
Kotlin is Google's official language for Android development, offering more concise code and stronger null safety than Java. Java is the older language Android was originally built on and remains supported, but Google now recommends Kotlin for all new projects.
Yes. We migrate legacy Java codebases to Kotlin module by module, so the app stays functional and shippable throughout the transition.
Yes. We prepare the store listing, screenshots, and a signed Android App Bundle, then manage the submission and respond to any Google Play review feedback.
We test on a representative matrix of physical devices covering different screen sizes, manufacturers, and the Android versions your target users actually run, rather than relying on the emulator alone.
Yes. We build adaptive layouts that adjust to phone, tablet, and foldable screens from a shared codebase, using Jetpack Compose's responsive layout tools.
Yes. You own 100% of the source code and intellectual property, delivered in a documented, ready-to-hand-over repository.
Yes. We offer maintenance retainers covering Android version updates, bug fixes, and new feature development after your app goes live.
The Google Play Developer account requires a one-time $25 registration fee, paid directly to Google, which is required to publish apps on the Play Store. This fee is separate from development cost.
Yes. We sign an NDA before the discovery call, before you share any product or business details with us.