Android app development for businesses that want to be on every phone
Android runs most of the world's smartphones, on thousands of different devices. We design and build Android apps that behave properly across that range and are published on Google Play under your own developer account.
- Kotlin
- Flutter
- Google Play
- UI/UX design
How we build native Android apps
Native Android apps are written in Kotlin, the language Google recommends for Android, using Android Studio and the Jetpack libraries. New screens are built with Jetpack Compose, Google's declarative UI toolkit, and follow Material Design so buttons, navigation and system gestures behave the way Android users expect.
Behind the screens, an app normally needs local storage for offline use, background work that survives the phone's battery saving, push notifications through Firebase Cloud Messaging, and a secure API that connects it to your database and admin panel. We build both the app and that backend, from our office in Kota, Rajasthan, India, for clients in India and abroad.
Watch: from app idea to app store
Android development services
Custom Android apps
Native Kotlin apps or cross-platform Flutter apps, chosen after we know your features, budget and plans for iOS.
App UI/UX design
Material Design interfaces with user flows mapped and a clickable prototype approved before development starts.
API and backend development
Secure REST APIs, databases, admin panels and cloud hosting behind your app.
Payments and integrations
Payment gateways, UPI, maps, push notifications, analytics, crash reporting and third-party APIs.
Testing across devices
Functional and performance testing on small and large screens, older and current Android versions, and low-memory phones.
Google Play publishing and updates
Store listing, release management, policy forms and updates when Google raises its target API level requirement.
Native Kotlin or Flutter for your Android app?
Flutter is Google's cross-platform toolkit. It uses the Dart language and draws its own interface, so one codebase can produce both an Android and an iOS app. Native Kotlin uses Android's own components directly. This is how the two compare when Android is your main platform.
| Question | Native Kotlin | Flutter |
|---|---|---|
| Do you also need an iPhone app soon? | A separate Swift app has to be built | The same code produces the iOS app, with some platform-specific work |
| Access to new Android features | Available as soon as Google releases them | Depends on plugins, or on native code written alongside |
| Home screen widgets, Wear OS, Android Auto, Android TV | Fully supported | Need native Kotlin code for those parts |
| Heavy use of Bluetooth, sensors, camera or background services | The safer choice | Possible, but more plugin and native bridging work |
| App download size | Smaller | Somewhat larger, because the Flutter engine ships inside the app |
| Look and feel | Follows the Android system automatically | Consistent across both platforms, drawn by Flutter |
| Development effort for two platforms | Two codebases to build and maintain | One main codebase to build and maintain |
Handling Android device fragmentation
Android phones come from many manufacturers, in many screen sizes, running several Android versions at once. An app that works on the developer's phone can still fail on a customer's. These are the points we plan for.
Minimum Android version
We choose the oldest Android version to support by looking at who your users are, and use AndroidX libraries so newer features degrade gracefully on older phones.
Screen sizes and densities
Layouts are built to adapt to small phones, large phones, tablets and foldables instead of being fixed to one size.
Manufacturer battery restrictions
Some manufacturers close background apps aggressively. Scheduled work uses WorkManager and notifications are tested on those brands.
Low-memory and slow devices
Image sizes, list scrolling and startup time are checked on entry-level phones, not only on flagships.
Permissions
Location, camera, notification and storage permissions are requested at the moment they are needed, and the app still works if the user refuses.
Crash and ANR monitoring
Firebase Crashlytics and Android vitals in Play Console show which devices and versions have problems after release.
APK and AAB: what gets uploaded
An APK is the installable Android package. It can be shared directly and installed on a phone, which is useful for quick internal testing or for apps distributed outside the store. An Android App Bundle, or AAB, is the publishing format Google Play requires for new apps. You upload one bundle and Google Play generates optimised APKs for each device, so users download only the code and resources their phone needs.
Bundles are signed through Play App Signing. Google holds the app signing key, and we upload with a separate upload key that can be reset if it is ever lost. The keystore and its passwords are handed over to you, because whoever holds them controls future updates.
Play Console testing tracks
Internal testing
A small list of testers gets new builds quickly. Used by our team and yours during development.
Closed testing
A wider invited group tests by email list. Google requires new personal developer accounts to run a closed test before they can apply for production access.
Open testing
Anyone can join the test from the store listing. Useful for a public beta before the full launch.
Production with staged rollout
The release goes to a share of users first. If crash rates stay healthy the share is increased, and the rollout can be halted if they do not.
Google Play policies we prepare for
Most Play rejections and removals come from policy forms and declarations rather than from code. These are completed with you before submission.
- A privacy policy URL that matches what the app actually collects
- The Data safety form, declaring data collected, shared and how it is secured
- The content rating questionnaire and target audience declaration
- Permission declarations for sensitive permissions such as background location, SMS, call log and all-files access
- Target API level: new apps and updates must target a recent Android version, and Google raises this requirement regularly
- An account deletion option, in the app and on the web, if users can create accounts
- Google Play's billing system for digital goods and subscriptions sold in the app, while physical goods and services use ordinary payment gateways
- Store listing rules: accurate screenshots, no misleading claims and no keyword stuffing in the title
- Test login details for the review team if the app needs sign-in
Our Android delivery process
Discovery
We list the features, user roles, integrations and the devices your customers use, then send a scope and quote.
Design
User flows and Material Design screens are prototyped and approved.
Build
Development runs in short cycles, with test builds shared through the internal testing track as features are completed.
QA
Manual testing on physical phones, automated checks, and the Play Console pre-launch report run before each release.
Play submission
The signed bundle, store listing and policy forms are submitted from your developer account, and review feedback is handled.
Maintenance
Crash fixes, updates for new Android versions and policy deadlines, and new features after launch.
Apps we build
- Business and customer apps
- E-commerce and ordering apps
- Booking and appointment apps
- Travel and flight booking apps
- Internal tools and field-staff apps
- Minimum viable products for startups
Frequently asked questions
How much does Android app development cost?
The cost depends on the number of screens, user roles, integrations such as payments or maps, whether a backend and admin panel are needed, and whether the app is native Kotlin or Flutter for two platforms. A simple catalogue app and a booking app with live tracking are very different amounts of work. After a discovery call we send a written scope with a fixed quote and a timeline.
Should I build my Android app in Kotlin or Flutter?
Choose native Kotlin when the app relies on device features such as Bluetooth, background location, home screen widgets or Wear OS, or when Android is your only platform. Choose Flutter when you want Android and iOS apps from one codebase and the app is mostly screens, forms, lists and API calls. Both can be published on Google Play in the same way.
What is the difference between an APK and an AAB file?
An APK is a complete installable app file that can be copied to a phone and installed directly. An AAB, or Android App Bundle, is a publishing format that is uploaded to Google Play, which then builds smaller APKs tailored to each device. Google Play requires AAB for new apps. APKs are still used for direct sharing and testing outside the store.
Will you publish the app on Google Play under my account?
Yes. You register the Google Play developer account in your own or your company's name and invite us as a user with release permissions. The listing, reviews, statistics and users then belong to you. Organisation accounts need business verification details, so it helps to start the registration early in the project because Google's checks can take time.
How do you test an Android app on so many different devices?
We test manually on a set of physical phones that covers small and large screens, older and recent Android versions and more than one manufacturer. Emulators cover other screen sizes. Play Console's pre-launch report then runs the build automatically on further devices and reports crashes and layout problems. After launch, crash reports grouped by device model show anything that was missed.
Why do Android apps get rejected or removed from Google Play?
Frequent reasons are a missing or inaccurate privacy policy, a Data safety form that does not match the app's behaviour, sensitive permissions requested without a valid use, targeting an outdated API level, misleading store listings and broken sign-in during review. Google sends the policy reference with each rejection. The issue is corrected and the app is resubmitted or appealed from Play Console.
Do I need to update my Android app after it is launched?
Yes. Each year Google releases a new Android version and raises the target API level that apps must meet to keep publishing updates. Libraries and payment or map SDKs also release security fixes. An app left untouched for a long time can lose visibility to users on newer devices. Planned maintenance covers these updates along with crash fixes.
Can my Android app accept payments through UPI or a payment gateway?
Yes, for physical goods and real-world services such as orders, bookings and tickets. The app integrates a gateway SDK or opens the customer's UPI app to complete the payment. Digital content and subscriptions consumed inside the app generally have to use Google Play's billing system instead. We confirm which rule applies to your product before designing the checkout.
Related
iOS app development
iOS app development in Swift and SwiftUI: iPhone and iPad apps, TestFlight builds, App Store Connect setup, in-app purchase rules and App Review handled.
Learn moreMobile app developmentMobile app development
Mobile app development for iOS and Android: scoping, UI/UX design, native or Flutter builds, testing, store publishing and maintenance after launch.
Learn morePayment gateway integrationPayment gateway integration
Payment gateway integration for websites and apps: Stripe, Razorpay, PayPal, PayU and CCAvenue, with webhooks, refunds, subscriptions and sandbox testing.
Learn moreReady to start?
Tell us what you need and get a clear plan and price within 1 business day.