Custom Android apps
Built around your users, workflows, and business model. No forced templates, and no features added because they sound impressive in a proposal.
Android Development
Android Apps That Behave on Every Device
Android is the largest mobile audience in the world and the most fragmented. We build Kotlin apps that hold up across manufacturers, screen sizes, and OS versions, from strategy through Google Play launch.
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Android Development
Android development, end to end
Whether you are starting from a blank page or rescuing an app that already exists, the work fits one of these shapes.
Native Kotlin engineering
Kotlin with the modern Android SDK and Jetpack libraries, the right choice when performance, deep device access, and long-term stability matter most.
Enterprise and field apps
Apps for field teams, logistics, retail, and internal operations, shaped around the work your people actually do every day instead of an idealized process chart.
Cross-platform when it fits
If you need Android and iOS without two separate builds, we will say so honestly and use Flutter or React Native where that is the smarter call.
API and backend integration
We wire your app cleanly into APIs, databases, payment systems, CRMs, and third-party platforms so data moves reliably instead of breaking at the seams.
Maintenance and rescue
Already running an Android app that feels slow or fragile? We profile it, fix the real causes, and keep it current as new OS versions land.
Have an Android app in mind?
Send us the requirements and target users. You get a written scope, an honest timeline, and a fixed USD quote before you commit anything.
Start a ProjectHow it works
From idea to Google Play in six steps
- 01
Discovery and scope
We pin down users, goals, core features, and the business model. Scope is written and agreed before design or code begins.
- 02
UI, UX, and app flow
Screens, journeys, and navigation are designed and reviewable before engineering opens, when changes still cost almost nothing.
- 03
Architecture planning
App structure, APIs, database, integrations, analytics, and Google Play requirements are decided early, so nothing expensive surprises us later.
- 04
Sprint development
The app is built in short sprints with working demos at each one, so you watch it take shape instead of waiting for a reveal.
- 05
Real device testing
Performance, layouts, APIs, and crash behavior are verified on physical Android handsets across manufacturers and OS versions.
- 06
Launch and support
We prepare and manage the Google Play release, watch post-launch behavior, and keep the app healthy through future OS updates.
Why AIoptimix
Why teams trust us with Android
Fragmentation is planned for
Android users are spread across wildly different devices. We design and test for varied screens, chipsets, and OS versions instead of hoping one flagship phone represents them all.
Scope before code
Most budget overruns are born in vague requirements. We do not start development until scope is written, agreed, and priced in USD.
Full ownership, in writing
App, source code, repositories, design assets, and documentation belong to you. There is no lock-in after launch and nothing we keep back.
Security in the architecture
Secure storage, safe API handling, and biometric authentication are designed in from the start rather than patched on before submission.
Tools and stack
Our Android stack
Languages
- Kotlin
- Java
Android
- Android SDK
- Jetpack Compose
- Material Design
Cross-platform
- React Native
- Flutter
Backend
- Node.js
- Python
- PostgreSQL
- Firebase
- AWS
Engagement models
Pick the model that fits.
Staff Augmentation
Vetted engineers who join your team, work your hours, and follow your workflow.
Learn more →Dedicated Teams
A complete unit with delivery management that owns your product end to end.
Learn more →Fixed Price
A written scope, a fixed USD quote, and a committed timeline before we start.
Learn more →FAQ
Frequently asked questions.
Should I build native Android or cross-platform?
Native Kotlin gives the best performance, deepest platform integration, and full access to Android features. Cross-platform makes sense when your users split across Android and iOS and two native builds are not justified. We advise on this before the build starts, based on your product rather than a house preference.
How do you handle Android device fragmentation?
By testing on physical hardware, not emulators alone. Layouts, performance, and behavior are verified across real handsets from different manufacturers with varied screen sizes, chipsets, and OS versions, because fragmentation is the most common source of post-launch Android bugs.
Who owns the source code?
You do, completely. Repositories, design assets, and backend infrastructure are yours, and that transfer is written into the engagement before the first line of Kotlin exists. It is a contract term, not a verbal assurance.
What technologies do you build Android apps with?
Kotlin is our primary native language, with Java for legacy codebases. Cross-platform builds use React Native or Flutter. Backends are typically Node.js or Python with PostgreSQL, Firebase, or AWS depending on the product architecture.
Can you take over an Android app another developer started?
Yes. We begin with a code review: what exists, what works, what is broken, and what technical debt sits underneath. Problems are identified and a clear written plan agreed before new code is written on top.
Related
Keep exploring.
iOS App Development
Swift and SwiftUI apps built to Apple standards and App Store review requirements.
Learn more →Cross-Platform Development
One codebase for both stores when two native builds are not worth the cost.
Learn more →React Native Development
Shared JavaScript and TypeScript code across mobile and your React web app.
Learn more →Start your Android build
Tell us about the app through our contact form. You will get a straight technical opinion and a fixed USD quote, not a sales script.
Start a Project