App Development Services
Native and cross-platform mobile applications that deliver exceptional user experiences. From concept to App Store, we build apps that users love and businesses rely on.
App Development We Deliver
Fitness iOS App
Native Swift app with HealthKit integration, 50K+ downloads and 4.8★ rating
E-Commerce React Native App
Cross-platform app for iOS and Android with 40% increase in mobile conversions
Enterprise Android App
Kotlin-based field service app with offline capability and real-time sync
Why Choose Flex Tech Design
App Store Rating
Average rating across our published apps
Performance
Smooth animations and native feel
Store Optimized
Complete with ASO for discoverability
What's Included
Platforms & Technologies
iOS (Swift/SwiftUI)
Native iOS apps with the latest Apple frameworks and best performance
Android (Kotlin)
Native Android apps following Material Design guidelines
React Native
Cross-platform apps sharing code between iOS and Android
Flutter
Google's framework for beautiful, natively compiled apps
Firebase
Backend services, authentication, and real-time databases
AWS Amplify
Scalable cloud backend for mobile applications
Our App Development Process
Discovery & Planning
We define your app's requirements, target users, and technical architecture. Market research and competitor analysis inform our strategy.
Design & Prototyping
Wireframes evolve into high-fidelity designs. Interactive prototypes let you experience the app before development begins.
Development Sprints
Agile development with regular builds. Each sprint delivers working features you can test on your device.
Testing & QA
Comprehensive testing across devices. Beta testing with real users via TestFlight and Google Play Beta.
Launch & Optimize
App Store submission with ASO optimization. Post-launch monitoring, user feedback, and iteration.
“The app Flex Tech Design built exceeded our expectations. It's fast, beautiful, and our users love it. We went from idea to App Store in 10 weeks, and the app has maintained a 4.8-star rating with 50K+ downloads.”
Marcus Thompson
Founder, FitTrack Mobile
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Frequently Asked Questions
Native vs cross-platform - which should I choose?
Native apps (Swift/Kotlin) offer the best performance and access to all platform features. Cross-platform (React Native/Flutter) is faster to develop, costs less, and easier to maintain. We recommend native for complex apps or when platform-specific features are critical, and cross-platform for most business apps and MVPs.
How long does app development take?
MVP apps: 8-12 weeks. Full-featured apps: 12-20 weeks. Complex apps: 4-6 months. Timeline depends on features, platform choice, and design complexity. We provide detailed estimates after requirements gathering.
Do you handle app store submission?
Yes, we handle the complete submission process for both App Store and Google Play. This includes store listings, screenshots, descriptions, privacy policies, and compliance with platform guidelines. We also set up App Store Optimization (ASO) for better discoverability.
What about backend and APIs?
We build complete solutions including backend APIs, databases, authentication, and cloud infrastructure. We work with Firebase, AWS, and custom Node.js backends depending on your needs.
Do you provide source code and ownership?
Yes, you own 100% of the code and intellectual property. We provide complete source code, documentation, and repository access. You're never locked into our services.
What about ongoing maintenance?
We offer maintenance packages including OS compatibility updates, bug fixes, performance monitoring, new feature development, and App Store/Play Store updates. Critical bugs are addressed within 24 hours.
Ready to Build Your App?
Let's create a mobile app that users love, that drives engagement, and that grows your business.