Android App Development · Mumbai
Android app development in Mumbai, built for the phones your customers actually use.
We build native Android apps in Kotlin, or cross-platform apps in Flutter when that fits better, then test them on the range of devices and Android versions your users own, launch them on Google Play and support them after release. Strategy, design, development and testing all happen in our Andheri East office.
What is Android app development?
Android app development is the process of designing, building, testing and publishing applications for devices that run Google’s Android operating system. Native Android apps are written in Kotlin (or Java) using the Android SDK and Android Studio, follow Google’s Material Design guidelines, and are distributed to users through Google Play.
What does ABC Designs’ Android app development service include?
ABC Designs, a digital agency in Andheri East, Mumbai founded in 2012, provides Android app strategy, UI/UX design, native Kotlin and Flutter development, backend and API integration, testing on real devices, Google Play launch and maintenance. Projects run in two-week sprints, with a working build you can install on your own phone after each one.
01 — Diagnosis
Why do Android apps get poor ratings?
Android’s biggest strength, thousands of device models and Android versions, is also why apps break. These six problems cause most of the one-star reviews we see.
Device fragmentation
What happens: the app looks fine on the developer’s phone but breaks on smaller screens or older Android versions.
How we prevent it: A device test matrix covering low-, mid- and high-end phones and the Android versions your users actually run.
Slow on budget phones
What happens: long start times, janky scrolling and battery drain on entry-level devices.
How we prevent it: Performance profiling in Android Studio, lighter assets and efficient background work.
Crashes and freezes
What happens: the app closes or stops responding, and Google Play’s Android vitals start flagging it.
How we prevent it: Crash reporting from day one, with fixes prioritised by how many users each issue affects.
Too many permissions
What happens: users refuse location, contacts or storage access and abandon the app.
How we prevent it: Ask only for what the app needs, only when it needs it, with a clear reason.
Poor offline handling
What happens: blank screens or lost data when the network drops.
How we prevent it: Offline caching and data sync designed in from the start.
Google Play rejections
What happens: launch delays from policy, data-safety or target API level issues.
How we prevent it: A pre-submission checklist against current Google Play policies and requirements.
02 — What’s included
Our Android app development services
Everything from a first version to modernising an app you already have. Hire us for the full build or for one part, such as testing, a Play Store launch or taking over an existing app.
Custom Android app development
01Apps built around your business process, not a template.
- Requirements and feature scoping
- Architecture and technology choice
- Two-week build sprints
You get: Production-ready Android app
Native Kotlin development
02Native apps for the best performance and full access to device features.
- Kotlin and Android Jetpack libraries
- Jetpack Compose interfaces
- Camera, GPS, Bluetooth and NFC
You get: Native Android codebase
Flutter cross-platform apps
03One codebase for Android and iOS when you need both platforms.
- Flutter with shared business logic
- Native modules where needed
- One release pipeline
You get: Android + iOS apps from one codebase
Android UI/UX implementation
04Screens that follow Material Design and match the approved design exactly.
- Material Design 3 components
- Layouts for phones, foldables and tablets
- Dark mode and accessibility
You get: Polished, consistent interface
Mobile app UI/UX design →API & backend integration
05Connect your app to the systems that run your business.
- REST APIs and Firebase
- Payments (Razorpay, UPI), maps and SMS
- CRM and ERP sync
You get: Secure, documented integrations
API development & integration →E-commerce & business apps
06Shopping, booking, dealer and field-sales apps that tie into your operations.
- Catalogue, cart and checkout
- Push notifications and offers
- Order and inventory sync
You get: App connected to your sales process
Testing & quality assurance
07Catch problems on real devices before your users do.
- Device and Android-version matrix
- Automated and manual tests
- Performance and security checks
You get: Test report with every release
Google Play launch
08Get approved and give your app a strong start on Google Play.
- Store listing, screenshots and data-safety form
- Internal, closed and open testing tracks
- Staged rollout to users
You get: Live app on Google Play
Modernisation & upgrades
09Bring an old or inherited Android app up to date.
- Java to Kotlin migration
- Target API level and library updates
- Performance and interface refresh
You get: Modern, maintainable app
Maintenance & support
10Keep the app stable as Android versions and devices change.
- Updates for new Android versions
- Crash monitoring and fixes
- Feature enhancements
You get: Monthly support plan
App maintenance & support →03 — Choosing your approach
Native Kotlin or Flutter: which is right for your Android app?
Choose native Kotlin if your app depends on deep device features or serves Android users only; choose Flutter if you also need an iOS app and want one codebase. We recommend one during discovery and explain the trade-offs in writing.
| Native Android (Kotlin) | Flutter (Android + iOS) | |
|---|---|---|
| Best for | Apps that rely on hardware, background services, wearables or an Android-only audience | Consumer and business apps that need both Android and iOS |
| Platforms | Android only | Android and iOS (and web) from one codebase |
| Performance | Best possible | Near-native for most apps |
| New Android features | Available as soon as Google releases them | Most features through plugins; native code for the rest |
| Cost if you need iOS too | Higher: a separate iOS app is needed | Lower: one team, one codebase |
| Long-term maintenance | One codebase per platform | One shared codebase |
Google recommends Kotlin for new native Android development (Android Developers). Building for iPhone as well? See iOS app development.
04 — Our process
How we build your Android app, in six stages
Each stage ends with something you can see, install and sign off, so you never pay for weeks of work you haven’t reviewed.
-
Stage 1 · Weeks 1–2
Discover
- Goals, users and competitors
- Feature list and version-one scope
- Kotlin or Flutter recommendation
Deliverable: Product brief + fixed-scope estimate
-
Stage 2 · Weeks 2–5
Design
- User flows and wireframes
- Material Design UI
- Clickable prototype
Deliverable: Approved prototype
-
Stage 3 · Two-week sprints
Build
- App and backend development
- API and payment integrations
- Demo at the end of every sprint
Deliverable: Installable builds after each sprint
-
Stage 4 · Throughout
Test
- Real-device and Android-version testing
- Performance and security checks
- User acceptance testing with you
Deliverable: Release-ready build + test report
-
Stage 5 · Launch week
Launch
- Closed testing track on Google Play
- Store listing and data-safety form
- Staged rollout to all users
Deliverable: Live app + full code handover
-
Stage 6 · Ongoing
Grow & support
- Android vitals and crash monitoring
- Updates for new Android versions
- Plan and ship the next features
Deliverable: Monthly report + roadmap call
05 — Timelines
How long does it take to develop an Android app?
A simple Android app typically takes 6–8 weeks; a mid-sized app 10–16 weeks; a complex app with a custom backend 4–6 months or more. Scope, integrations and how quickly feedback comes back set the pace.
Simple app or MVP. A focused first version: a handful of core screens, login and a basic backend.
Mid-complexity app. User accounts, payments, notifications, an admin panel and a few third-party integrations.
Complex app. Custom backend, real-time features, multiple user roles, offline sync or enterprise integrations.
Typical ranges from our projects, not a guarantee. Google Play review time is extra and can take several days for new apps. Bars are illustrative.
06 — Reporting
How we measure a successful Android app
After launch you get a dashboard tracking these numbers, agreed with you during discovery.
| Metric | Why it matters | Source |
|---|---|---|
| Crash rate & ANR rate | Google Play’s Android vitals flag apps with high crash or “app not responding” rates, which can hurt visibility. | Play Console vitals |
| Crash-free users | The share of users who never hit a crash. | Firebase Crashlytics |
| Retention (day 1, 7, 30) | Whether people come back after installing. | Firebase / GA4 |
| App start time | Slow starts get apps closed and uninstalled, especially on budget phones. | Android vitals / Firebase Performance |
| Store rating & reviews | Drives installs and shows what users love or dislike. | Play Console |
| Device coverage | How much of your real user base’s devices and Android versions we test on. | Play Console device catalogue |
| Release cadence | How often fixes and improvements reach users. | Release log |
07 — Android apps by business type
What we prioritise depends on who will use your app
Retail, e-commerce & D2C
Repeat buyers shop more often in an app than on a mobile site.
FOCUS · Catalogue, UPI checkout, push offers
Field sales & distribution
Sales teams book orders and visit dealers in areas with patchy networks.
FOCUS · Offline order booking, GPS check-ins, ERP sync
Healthcare & wellness
Bookings, reminders and records, where privacy comes first.
FOCUS · Appointment flows, data security, consent
Education & coaching
Students expect lessons, tests and schedules on their phone.
FOCUS · Video, progress tracking, low-data mode
Real estate
Buyers browse projects and book site visits on mobile.
FOCUS · Listings, maps, enquiry and CRM sync
Startups
You need to prove the idea with real users quickly.
FOCUS · Lean MVP, analytics, fast iteration
08 — Our standards
How we work: what we always do, and what we never do
We build to Google’s core app quality guidelines, Google Play policies and the OWASP mobile security standard, so your app passes review and stays maintainable.
We always
- Test on a matrix of real Android devices and versions
- Keep up with Google Play policies and target API level deadlines
- Ask only for the permissions your app needs
- Hand over source code, signing keys and Play Console access in your name
- Document the code and architecture
We never
- Ship debug builds or keys hard-coded in the app
- Use unlicensed code or libraries
- Collect data not declared in your data-safety form
- Hold your code or accounts to lock you in
- Hand your project to an outside team without telling you
09 — Pricing
How much does Android app development cost in Mumbai?
Android app development cost depends on the features and screens, native Kotlin or Flutter, the backend you need and the integrations involved. Most clients start with a free consultation, then a short discovery phase that produces a prototype and a fixed-scope quote.
Discovery & prototype
A clear plan and a clickable prototype you can test, pitch or take to any developer.
- Discovery workshop
- Feature scope and user flows
- UI/UX design + prototype
- Fixed-scope build quote
Android app build
Design, development, testing and Google Play launch of your app.
- Everything in discovery
- Kotlin or Flutter build
- Backend, admin panel and integrations
- Play Store launch + code handover
Maintenance & growth
Keep the app healthy and improving after launch.
- Android version updates
- Crash monitoring and fixes
- Monthly feature hours
- Usage report + roadmap call
What changes the price: number of features and screens · native Kotlin or Flutter · backend and admin panel · third-party integrations · range of devices supported · security needs.
10 — Technology
The technologies we build Android apps with
Google-recommended tools and widely used frameworks, so your app is easy to maintain and hire for.
11 — FAQ
Android app development: frequently asked questions
Have a question about your own app idea? Book a free consultation and we’ll answer it for your project specifically.
What is Android app development?
Android app development is designing, building, testing and publishing apps for phones and tablets that run Google’s Android operating system. Native apps are written in Kotlin or Java with the Android SDK and released on Google Play.
How much does Android app development cost in Mumbai?
Cost depends on the number of features and screens, native or Flutter development, the backend and admin panel, and integrations such as payments or CRM. ABC Designs gives a fixed-scope quote after a short discovery phase; book a free consultation for a ballpark range.
How long does it take to build an Android app?
A simple Android app or MVP typically takes 6–8 weeks, a mid-complexity app 10–16 weeks, and a complex app with a custom backend 4–6 months or more. Google Play review adds a few days.
Which language do you use for Android apps?
We use Kotlin, Google’s recommended language for native Android, with Jetpack libraries and Jetpack Compose. We also maintain Java apps and build cross-platform apps in Flutter.
Should I build a native Android app or use Flutter?
Choose native Kotlin if the app relies heavily on device features or targets Android users only. Choose Flutter if you need Android and iOS, since one codebase lowers cost and maintenance. We recommend one during discovery.
Will you publish my app on Google Play?
Yes. We prepare the store listing, screenshots and data-safety form, run closed testing, submit the app and handle any review feedback until it is live.
Will my app work on all Android phones?
We test on a matrix of real low-, mid- and high-end devices and the Android versions your target users run, and set a minimum supported version with you during discovery.
Can you upgrade or fix an existing Android app?
Yes. We audit the code, crashes and reviews, then fix, modernise (for example Java to Kotlin, or new target API levels) or rebuild, whichever costs you less in the long run.
Can you build the iOS version of my Android app?
Yes. We can build a native iOS app in Swift, or rebuild both platforms in Flutter so they share one codebase from then on.
Will my Android app be secure?
We follow the OWASP Mobile Application Security Verification Standard: encrypted storage and traffic, secure authentication, no secrets in the app, and security testing before release.
Do I own the source code and the Google Play account?
Yes. The app is published under your own Google Play developer account, and you receive the full source code, signing keys and documentation at handover. [Confirm with contract terms.]
Do you provide support after launch?
Yes. Our maintenance plans cover updates for new Android versions, crash monitoring, bug fixes, security patches and new features.
Do you work with clients outside Mumbai?
Yes. Our team is based in Andheri East, Mumbai, and we build Android apps for businesses across India and internationally, with video calls and sprint demos.
12 — Glossary
Android development terms, explained simply
- Kotlin
- A modern programming language that Google recommends for native Android apps.
- Jetpack Compose
- Google’s modern toolkit for building Android app interfaces in Kotlin.
- Android SDK
- The software development kit of tools and libraries used to build Android apps.
- APK and AAB
- Android app package formats. Google Play requires the Android App Bundle (AAB) for new apps.
- ANR
- “Application not responding”: the error Android shows when an app freezes for too long.
- Google Play Console
- Google’s dashboard for publishing apps, managing releases and monitoring Android vitals.
- Target API level
- The Android version an app is built for. Google Play requires apps to target a recent level.
- Material Design
- Google’s design system for Android apps.