React Native Development
One JavaScript/TypeScript codebase targeting both platforms.
- React Native and Expo
- Shared business logic
- Native module bridging
Mobile Engineering
One Codebase, Both Stores, No Nasty Surprises
Cross-platform halves the build cost when the app is mostly screens, forms and API calls. RASPSYS is clear about where it stops paying — and builds native when that line is crossed.
What We Deliver
What We Deliver With Cross Platform App Development
The saving is real but it is not 50% forever. Platform-specific work always appears; we scope for it rather than pretending otherwise.
Flutter Development
Dart and a single rendering engine for consistent UI across platforms.
- Flutter and Dart development
- Custom widget libraries
- Platform channel integration
Platform-Aware UI
Shared code that still feels right on each platform.
- Platform-adaptive navigation
- iOS and Android design conventions
- Responsive and tablet layouts
Backend Integration
Connect to Salesforce, your API and push services.
- REST API and auth handling
- Offline storage and sync
- Cross-platform push notifications
Testing
One codebase still needs testing on two platforms.
- Unit and widget tests
- Device matrix testing
- Automated end-to-end coverage
Dual Store Release
Both submissions, with their different rules.
- App Store and Play submission
- Shared release pipeline
- Crash monitoring across platforms
How We Work
Our Cross Platform App Development Delivery Approach
A structured engagement model that de-risks delivery and gets working output into your team's hands early.
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Define
We agree scope, users and what the first shippable release contains.
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Design
Architecture, navigation and API contracts settled before building.
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Build
Iterative development with review at the end of each slice.
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Verify
Device, performance and accessibility testing before release.
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Release
Store submission, monitoring and post-launch support.
Not Sure Cross-Platform Fits Your App?
Most engagements start with a short discovery call. RASPSYS LLP will compare it against native for your actual requirements.
Why RASPSYS
Why Clients Choose RASPSYS LLP for Cross Platform App Development
We deliver for clients across the UK, US, UAE, Canada, and Australia - with teams that work in your time zone.
Honest About Limits
We will tell you when your requirements have outgrown cross-platform.
Global Delivery
Supporting product teams across the UK, US, UAE, Canada and Australia.
Store-Ready
We handle submission, review feedback and the metadata that affects discovery.
FAQs
Frequently Asked Questions
The questions we are asked most often about Cross Platform App Development.
React Native if your team already writes React and TypeScript - the skills transfer directly and hiring is easier. Flutter if visual consistency across platforms matters most and you are comfortable with Dart; its rendering approach gives more pixel control. Both are mature; the deciding factor is usually your existing team.
When the app depends heavily on platform capability - sustained background processing, complex camera or sensor work, tight OS integration like widgets and watch apps - or when performance is the product. Also when you genuinely need the newest platform features on day one, since cross-platform support always lags.
Meaningfully, but not half. Expect roughly 60-70% of a dual-native build. Shared business logic and screens save the most; platform-specific behaviour, store compliance and testing on both platforms still cost what they cost. Anyone promising 50% has not scoped the platform work.
Yes, through the REST API with OAuth, exactly as a native app would. We have built field-service and sales apps on this pattern. The considerations - governor limits, offline sync, token refresh - are the same regardless of framework.
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What You Get
Built Around People, Not Just Platforms
Software projects fail on communication far more often than on technology. These are the outcomes our clients see, and the commitments behind them.
If that is how you want to work with a delivery partner, the next step is a short conversation — no pitch deck, no obligation.
Clients who stay
90%
Of RASPSYS clients continue working with us beyond their first engagement, most on an ongoing support or development arrangement.
Lower running cost
35%
Average reduction in ongoing admin overhead once we consolidate duplicated automation and strip out the manual steps nobody should still be doing.
Faster turnaround
2 weeks
Typical time from scope call to a working first release, because we ship in slices rather than disappearing for a quarter.
Adoption that holds
92%
Weekly active use six months after go-live, by designing around how your team actually works rather than around the platform defaults.
Support load reduced
40%
Fewer inbound tickets after self-service and documentation replace the questions that kept coming back.
Ready to Reach Both Stores on One Budget?
Book a free 30-minute call with a RASPSYS consultant.
We will scope the app and tell you if cross-platform genuinely fits.