Cross-Platform Apps
One Flutter or React Native codebase that runs natively on iOS and Android.
Mobile App Development
Mobile Apps People Love to Use
We design and build fast, reliable iOS and Android apps that turn your idea into a product on the App Store and Google Play.
The bigger picture
Technology that fits the way you work.
SSiT Nexus is a mobile app development company that builds cross-platform apps for startups, SMEs, and enterprises. Using Flutter and React Native, we ship a single codebase that runs natively on both iOS and Android — cutting your cost and time-to-market roughly in half versus building two separate native apps.
From the first wireframe to App Store and Google Play submission, the same engineers stay on your project. We handle UI/UX design, API and backend integration, offline support, push notifications, in-app payments, and post-launch maintenance — so you have one accountable partner for the whole journey.
What we can bring
The details, thoughtfully covered.
We shape the final scope together, choosing the capabilities that make sense for your project.
UI/UX Design
Clean, intuitive interfaces designed to convert and keep users coming back.
Backend & APIs
Secure REST/GraphQL APIs, authentication, and real-time data with Supabase or Firebase.
Store Submission
We handle App Store and Google Play review, listing assets, and release management.
Offline-First
Apps that keep working with poor or no connectivity and sync when back online.
Maintenance & Support
Ongoing updates, OS-version compatibility, crash monitoring, and new features.
A clear path forward
From first conversation
to what comes next.
Room for your feedback at every stage, with practical decisions and a shared understanding of progress.
- 01
Discovery
We map your goals, users, and must-have features into a clear, fixed-scope plan.
- 02
Design
Wireframes and a clickable prototype so you see the app before we build it.
- 03
Build
Two-week sprints with working builds you can install and test throughout.
- 04
Launch & Support
Store submission, launch, and ongoing maintenance after go-live.
Tools we work with
- Flutter
- React Native
- Dart
- TypeScript
- Firebase
- Supabase
- Node.js
- REST & GraphQL
Good questions
A little more clarity.
Have something else in mind? We’re happy to talk through the details.
Ask our teamHow much does it cost to build a mobile app?
It depends on scope, but most apps fall between a simple MVP and a full-featured product. After a free discovery call we give you a fixed-price proposal — no hourly surprises.
How long does it take to build an app?
A focused MVP typically takes 6–10 weeks; a larger app with complex features takes 12 weeks or more. We work in two-week sprints so you see progress continuously.
Do you build native or cross-platform apps?
We specialise in cross-platform with Flutter and React Native, which gives near-native performance from one codebase. We can build fully native when a project specifically needs it.
Will I own the source code?
Yes. Everything we build is yours — full source code, accounts, and documentation. No vendor lock-in.
Keep exploring
Other ways we can help.
Custom Software Development
Bespoke SaaS platforms, enterprise tools, APIs, and automation systems tailored exactly to your business workflows.
Web Development
Modern, fast, and SEO-optimised websites and web apps built with React, Next.js, and TypeScript. From landing pages to full-stack platforms.
Cloud & DevOps
AWS, Azure, Google Cloud, and Vercel deployments with CI/CD pipelines, containerisation, and infrastructure-as-code.