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I will do android app development and build your custom mobile app
Williams J
About this gig
Need a reliable Android app developer to build a fast, modern mobile app?
I build custom Android apps, mobile apps, and business apps shaped around your goals. My focus is Android app development, cross-platform mobile apps with Flutter and React Native, and clean, smooth-performing design.
Service include:
- Custom Android app Development
- Mobile app development for startups
- Flutter, Flutterflow, and React Native apps
- Kotlin Development
- Android studio projects
- UI/UX Design
- Firebase and API integration
- Database setup
- Bug fixing and app updates
- Play store ready apps
Every app I deliver is secure, scalable and easy to use, whether you're business, a startup or an entrepreneur.
With Flutter, React Native Kotlin, and Android Studio, I can turn your idea into a working mobile app.
Message me before ordering so we can go over your project.
Get to know Williams J
Williams J
Mobile App Developer, iOS and Android Specialist
- FromUnited States
- Member sinceOct 2025
- Avg. response time1 hour
Languages
English
Hi, I'm Williams, a mobile app developer specializing in Android and iOS. I help startups, businesses, and entrepreneurs turn ideas into fast, scalable, and user-friendly apps. My services include custom mobile app development with Flutter and FlutterFlow, API and backend integration, Firebase, UI/UX implementation, marketplace and booking apps, bug fixing, App Store and Google Play publishing, and ongoing maintenance. I focus on clean code, smooth performance, and apps that users enjoy.
My Portfolio
Other Mobile App Development Services I Offer
FAQ
Do you build apps for both Android and iOS?
Yes. Using Flutter or React Native, I can build one app that runs on both Android and iOS. Publishing to the App Store needs your Apple developer account. Message me first so we can confirm the scope.
Can you turn my idea into a working app?
Yes. Share your idea, even if it's rough, and I'll help shape the features, screens, and flow, then build it step by step. Send any sketches, references, or similar apps so we're aligned before I start.
Can you fix bugs in my existing Android app?
Yes. I can fix crashes, bugs, layout issues, and slow performance, and add new features. Message me with a short description of the problem and access to your code so I can review it before you order.
Will you publish my app on Google Play?
Yes, on the packages that include app submission. I'll prepare the release build and help you upload it under your own developer account, so you keep full ownership of the app.
What tools and frameworks do you use?
I mainly use Flutter, FlutterFlow, and React Native with Expo and TypeScript, plus Firebase and APIs for the backend. I can also work in Android Studio. Tell me what you need and I'll recommend the best fit.
