Cross-platform events app for a legal publisher, Flutter on iOS and Android
- 2+ yrs
- in production on iOS and Android without a rebuild
Cross Platform App Development
Building for iOS and Android separately doubles your mobile development cost. Cross-platform development with React Native or Flutter lets you build one codebase that runs on both platforms, at roughly 60-70% of the cost of two native apps, with 80-90% shared code and near-native performance for most use cases.
The right choice between cross-platform and native depends on your specific requirements. We advise on the technology decision and build whichever approach is right for your product, not whichever is easiest for us to deliver.
React Native and Flutter cross-platform development for iOS and Android from a single codebase
Near-native performance and native UI components, not a web wrapper
Full native feature access, camera, biometrics, push notifications, location, and device APIs
Shipping cross-platform apps to the App Store and Play Store since 2015, across consumer, B2B, and enterprise
Recent work
Mobile POS · FinTech, UAE
10,000+ transactions in 3 months
Built a cross-platform POS app for iOS and Android so merchants take contactless, QR, and tap-to-pay on a phone. Passed a 2025 PCI DSS audit.
Event app · Legal publisher, France
2+ years in production, no rebuild
Shipped Concurrences to the App Store and Play Store from one Flutter codebase, on top of the client's existing PHP backend.
B2B SaaS · Food & logistics, Indonesia
50+ restaurants in month one
Gula, our own multi-platform food order management product, launched with zero order errors across every channel. Acquired by Runchise.
The problem
Need iOS and Android apps but can't justify the cost of building and maintaining two separate native codebases?
Cross-platform app looking or performing like a web wrapper, degrading user experience compared to native?
Short answer
RaftLabs builds cross-platform mobile apps with React Native and Flutter for clients in the US, UK, Europe, Canada, and the UAE. One codebase ships to iOS and Android at 60-70% of dual-native cost, with 80-90% shared code. RaftLabs has shipped cross-platform apps since 2015. A focused v1 runs $25,000-$60,000 and launches in 10 to 14 weeks.
Key takeaways
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A founder needs the app on iOS and Android. Native means two codebases in two languages, two engineers who rarely touch each other's work, and two maintenance bills that never stop. So the Android build slips a quarter behind the iPhone one, and the roadmap splits in half.
The other route is a shortcut that shows: a web page in a native shell, janky scrolling, laggy taps, a login screen that feels a beat slow. Users can tell. They leave.
One codebase, real native UI on both platforms, is how you reach everyone at once without either compromise.
Building for iOS and Android separately means two codebases, two development streams, and two ongoing maintenance bills. React Native and Flutter remove that duplication: one codebase, running on both platforms, at roughly 60 to 70% of the cost of two native apps. This is now the default, not a compromise. In Statista's 2023 developer survey, Flutter and React Native were the two most-used cross-platform frameworks, reported by 46% and 35% of cross-platform developers respectively (Statista, 2023). The case against cross-platform is graphics and hardware depth: for apps needing intensive 3D, AR, or hardware access below what the frameworks expose, native is still the right answer. Most apps never hit those cases.
Plenty of teams reach us with something already built, a clickable prototype from Lovable or Replit, or an early MVP that demos well but now has to hold up for real users on both stores. We assess what's there, keep what's validated, rebuild what won't survive app-store review or real load, and ship one codebase to iOS and Android. Cross-platform sits inside our parent mobile app development practice; where a shared codebase is the wrong call, we build native iOS and Android instead. The team that scopes your app is the team that ships it, with GDPR, HIPAA, and SOC 2 requirements designed in from week 1, not retrofitted before launch.
Everything on the left should already be true for your product. Even one thing on the right, and native is the smarter build.
You need both iOS and Android, and maintaining two native codebases is cost you can't justify.
Your feature set is standard app territory: authentication, payments, push, camera, maps, location.
You want one codebase your team can maintain after launch, and budget for a build from $25,000.
What we build
Mobile app development
End-to-end mobile app builds across native and cross-platform, from discovery and design through App Store and Play Store delivery. The parent practice under which cross-platform sits.
iOS app development
Native iOS builds in Swift and SwiftUI for the cases where cross-platform is not the right answer, intensive graphics, deep hardware access, or platform-first OS features.
Android app development
Native Android builds in Kotlin for apps that need the latest platform APIs, custom device integrations, or performance characteristics beyond what a shared codebase exposes.
MVP development
A focused first version of your mobile product, one core workflow shipped to both stores fast, so you can validate demand before committing to the full build.
UI and UX design
Product design and interface work for cross-platform apps: navigation structure, component specs, and platform-aware patterns so the app feels native on both iOS and Android.
API development and integration
The APIs and third-party integrations behind the app, connecting your React Native or Flutter frontend to your backend, CRM, payment, and data systems with fault tolerance built in.
Support and maintenance
Ongoing feature development, OS-version updates, and monitoring after launch, or a clean handover to your internal team with full documentation of the shared codebase.
We are not tied to one framework. We recommend React Native or Flutter based on your team's existing skills, your feature requirements, and your UI design needs, then document every choice so any competent mobile team can maintain the codebase. The technologies we reach for most often:
| Layer | Technologies we use | Where it fits |
|---|---|---|
| Frameworks | React Native, Flutter, Expo | One codebase compiled to native iOS and Android UI |
| Language | TypeScript, Dart | Type-safe app logic in React Native (TypeScript) and Flutter (Dart) |
| State and data | Redux, Riverpod, SQLite | Predictable state management and offline-first local storage |
| Backend | Node.js, Firebase, Supabase | APIs, authentication, real-time data, and push notifications |
| Cloud and DevOps | AWS, CI/CD, Fastlane, EAS | Automated builds, signing, and App Store and Play Store delivery |
The rule holds at every layer: no proprietary frameworks that lock you in, and no stack we cannot hand to your team on day one.
30 minutes. You walk away with a clear cost, timeline, and team. No commitment.
How it works
Every project follows the same four phases. Scope is locked and price is fixed before development starts.
We map the problem, the user flows, and the platform requirements. You leave week 1 with a written scope document and a fixed-price quote. No development starts without your sign-off.
Wireframes and component specs before production code. We define the navigation structure, data model, and API contracts in week 2 so there are no surprises in week 8. Design decisions made here cost ten times less than the same decisions made mid-build.
Working app at a staging build by the end of sprint one. Bi-weekly demos with the full team. QA runs in parallel with every sprint, not as a phase at the end. Platform testing on real iOS and Android devices, not emulators only.
App Store and Play Store submission handled. Production monitoring activated on launch day. 8 weeks of post-launch support included in every project.
Clients include Vodafone, T-Mobile, Aldi, Nike, Cisco, and Lockheed Martin, across AI, SaaS, mobile, automation, and enterprise platforms.
Cross-platform apps we've shipped
A UAE FinTech operator wanted merchants to take payments without a hardware terminal. Before, merchants in cash-only areas either turned card customers away or rented a terminal they rarely earned back. We built a cross-platform POS app for iOS and Android, contactless cards, QR codes, tap-to-pay, and payment links, all on a phone. The hard part was PCI DSS scope: raw card data never touches the app, so we kept it out of scope through the payment SDK and passed a 2025 PCI DSS audit. It processed 10,000 transactions in the first three months and lifted sales roughly 25% for merchants in previously cash-only areas. Read the case study.
What clients say
Three-year average engagement. Founders and operators describing the work in their own words. No marketing varnish.

I found RaftLabs to be the perfect partner for Perceptional, with their expertise in helping startup founders build MVPs, a free consultation, a prototype that matched my vision, and their unwavering support.
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We price by project, not by the hour. After a scoping session you get a fixed quote with a defined scope, timeline, and price, so you know the number before development starts. Cross-platform development runs roughly 60 to 70% of equivalent dual-native cost, and the saving comes from the shared codebase, not from reduced feature scope. Where you land depends on scope, not negotiation:
What pushes cost up: complex real-time or offline-first features, deep native integrations, and strict compliance requirements such as HIPAA or PCI-DSS. What keeps it down: a narrow first scope, standard feature categories, and managed backend services rather than self-hosted infrastructure early on. We scope every project before pricing it.
What it costs
iOS and Android from a single codebase, at 60 to 70 percent of the cost of two native apps.
Cross-platform runs 60 to 70 percent of dual-native cost, from the shared codebase, not a reduced scope. Most teams start with a core app, then add platform-specific features once the first version is live.
We scope a first release, ship it, and price the next phase once you've seen it running on real devices.
No hourly billing
Once we scope your first release, that price is locked in writing. A scope change is a priced change request, agreed before work begins, never a surprise on the final invoice.
Post-launch support
Every project includes 8 weeks of post-launch support, with production monitoring activated on launch day.
The architecture changes with the domain. Regulated sectors need encryption, audit trails, and access controls designed in from sprint one, while consumer apps need offline resilience and smooth performance on mid-range devices. We build cross-platform apps for:
Healthcare: HIPAA-compliant patient apps, remote monitoring, and telehealth for iOS and Android.
FinTech: PCI-aware payment, account management, and lending apps with secure on-device data handling.
Logistics: driver, delivery-tracking, and field-service apps with offline-first data and background location.
Real estate: listing, tenant, and property-management apps for agents, buyers, and owners.
Insurance: claims capture, policy management, and inspection apps with photo and document workflows.
Education: learning, course-delivery, and student-engagement apps that work across devices and offline.
Cross-platform work rarely stands alone. For a heavier governance build, see enterprise mobile app development; for a consumer marketplace, on-demand app development. If you want to validate demand first, an MVP ships one core workflow to both stores fast, and UI and UX design shapes how the app feels native on each platform.
Stay on topic

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Read moreCross-platform app development uses a single codebase to build apps for both iOS and Android, React Native compiles to native iOS and Android components, Flutter uses its own rendering engine to produce pixel-identical native UI. The key difference from native development: you write one codebase instead of two (one in Swift/SwiftUI for iOS, one in Kotlin for Android). Cross-platform achieves 80-90% code sharing with platform-specific code for the features that require it (certain device APIs, platform-specific UI conventions). Performance is near-native for most use cases, the gap between cross-platform and native has narrowed significantly since 2015. The decision depends on your specific feature requirements, not a blanket preference.
Cross-platform (React Native or Flutter) is appropriate for: consumer and B2B apps covering most common feature categories (authentication, payments, push notifications, camera, maps, location), apps where the primary value is functionality rather than graphically intensive experience, and products where reducing development cost and maintaining a single codebase is commercially important. Native development (Swift for iOS, Kotlin for Android) is appropriate for: apps with intensive 3D graphics or AR (games, AR experiences), apps requiring deep hardware access below the level cross-platform frameworks expose, apps where the developer community, tooling, or latest OS features are on native first. Most apps, including many complex ones, are good cross-platform candidates. We advise on this before recommending an approach.
Both are viable for most projects. React Native is more appropriate for: teams with existing JavaScript/TypeScript experience, apps requiring extensive native module integration with existing JavaScript ecosystem packages, and React-based web teams extending to mobile. Flutter is more appropriate for: custom UI with pixel-level design fidelity, apps targeting specific performance characteristics, and teams without existing JavaScript background. Both achieve near-native performance. React Native has a larger community and more third-party packages; Flutter has more consistent cross-platform rendering. We recommend based on your team's existing skills, the specific features your app requires, and the UI design requirements.
A focused cross-platform app, authentication, core user workflow, push notifications, and app store delivery for iOS and Android, typically runs $25,000-$60,000. A more complete app with complex backend integration, real-time features, payments, and offline capability typically runs $60,000-$130,000. Consumer apps with complex UI and media features run higher. Cross-platform development costs 60-70% of equivalent dual native development, the saving comes from the shared codebase, not from reduced feature scope. We scope every project before pricing it and provide a fixed cost before development starts.
A focused v1, core features plus App Store and Play Store delivery, typically launches in 10 to 14 weeks from kick-off. That first version is built to validate the market, then you iterate on it. More complete apps with custom UI, real-time features, third-party integrations, and HIPAA or PCI-DSS requirements run 16 to 24 weeks. We have shipped cross-platform apps since 2015, usually reaching a first store submission in about 12 weeks. Timeline is fixed in the scope document before development starts.
Yes. We sign mutual NDAs before any technical discussion. Our standard NDA covers code, architecture, product concepts, and business information shared during the engagement. All engineers assigned to your project sign IP assignment agreements that transfer ownership to you on project completion.
We have shipped cross-platform apps across healthcare (HIPAA-compliant RPM and telehealth), logistics (driver and field service apps), hospitality (guest experience and mobile check-in), retail (loyalty programs and mobile POS), fintech (payment and account management apps), and B2B SaaS. Our healthcare and financial services experience means compliance requirements are scoped in week 1, not retrofitted before launch.
Work with us
We scope Cross Platform App Development in 30 minutes. You walk away with a clear cost, timeline, and approach. No commitment required.