Flutter App Development
Single-codebase apps in Dart that compile to native ARM code for iOS and Android with consistent 60fps rendering. Flutter is our pick for design-heavy consumer apps and startups racing to market.
Mobile App
Cross-Platform Apps
One codebase, two platforms — ship faster without compromise.
Flutter and React Native apps that deliver near-native performance on iOS and Android — cutting development time and cost by up to 40%.
Our Offerings
Cross-Platform Apps Services We Provide
React Native Development
JavaScript/TypeScript apps that share logic with your existing web codebase and tap a massive ecosystem of libraries. Ideal when your team already lives in React and wants web-to-mobile code reuse.
.NET MAUI & KMP Solutions
For Microsoft-stack enterprises we build with .NET MAUI; for teams wanting shared business logic with fully native UIs we use Kotlin Multiplatform. We recommend the framework that fits your team, not our preference.
Native Module Development
When cross-platform frameworks hit limits — Bluetooth peripherals, custom camera pipelines, background services — we write native Swift and Kotlin modules bridged cleanly into the shared codebase. You get one codebase without sacrificing platform power.
Cross-Platform Migration
We consolidate separate iOS and Android codebases into one Flutter or React Native app, cutting ongoing maintenance costs by up to 40%. Migrations run feature-by-feature in parallel with your current releases.
Desktop & Web From One Codebase
Flutter and React Native Web let us extend your mobile app to Windows, macOS, and the browser with 70-90% code reuse. One product team ships everywhere instead of three teams shipping separately.
What We Deliver
End-to-End Cross-Platform Apps
- Flutter / React Native
- Shared business logic
- Native module bridges
- Hot reload dev
- Single CI/CD pipeline
- Consistent UI/UX
Why Choose Devlex
Business Outcomes That Matter
✓40% faster delivery
✓Lower maintenance cost
✓Unified feature parity
✓Single team ownership
Technologies
Tools & Stack We Use
We pick the right technology for your goals — not the trendiest framework.
- Flutter
- React Native
- Dart
- TypeScript
- Firebase
- Codemagic
Our Approach
- Discover — Understand goals & constraints
- Design — Architecture & UX blueprint
- Build — Agile sprints with weekly demos
- Launch — Deploy, test & support
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How We Work
What You Get In Writing
Terms that go into every agreement we sign. See all client commitments.
A Written Price Before Work Starts
Every job gets a scope and a number in writing first — a fixed price for defined work, or an hourly rate with a capped estimate. If scope changes, we re-quote before we build, not after.
You Own the Code
Source code, designs, and data are yours. We work in your repository where possible, hand over full documentation, and transfer everything at the end. No license fees, no hostage situations.
NDA Before You Share Anything
We sign your NDA — or send ours — before the first technical conversation. Your idea, your data, and your customer information stay confidential during and after the engagement.
FAQ
Cross-Platform Apps — FAQs
Everything you need to know before starting your project. Still have questions? Talk to our team.
Flutter for design-rich consumer apps and the highest UI consistency; React Native when your team knows React or you share code with a web app; KMP or .NET MAUI for enterprises with existing Kotlin or C# investments. We assess your team, product, and roadmap in a free consultation before recommending.
An MVP for both iOS and Android takes 3-4 months — roughly the time it would take to build for one platform natively. Full-featured apps run 4-6 months including backend and both store launches.
Typical builds range $15,000 to $50,000 for both platforms combined, a 30-40% saving versus two native codebases. Ongoing maintenance is also cheaper since one fix ships to both stores simultaneously.
Yes — the complete Flutter or React Native project, native modules, CI configuration, and documentation are yours with full IP transfer. The frameworks themselves are open source, so there is no vendor lock-in.
For 90% of business and consumer apps, users cannot tell the difference — Flutter renders at native frame rates and React Native uses real native UI components. For edge cases like heavy AR or advanced background processing, we add native modules or recommend going fully native upfront.
Yes, we handle both submissions in one launch cycle — Apple review takes 1-2 days and Google Play 1-3 days, and we manage any review feedback. Post-launch, a single release pipeline pushes updates to both stores at once.
Related Services
Ready to start your cross-platform apps project?
Get a free consultation and a detailed project estimate within 24 hours.