Web & Mobile App Development

Build high-performance web applications and mobile apps with ReactFlutter, and PWA technology. We create responsive web appscross-platform mobile apps, and progressive web apps that deliver native-like experiences. From design systems to app store deployment, our developers build scalable solutions with 90% code sharing, faster time-to-market, and exceptional user experiences.

Our Development Services

Expert developers delivering cross-platform solutions with native performance

Cross-Platform Expertise

Flutter and React Native specialists with 90% code sharing between iOS and Android. One codebase, multiple platforms, faster delivery.

Native Performance

60fps animations, instant load times, and smooth interactions. We optimize Core Web Vitals and mobile performance for exceptional UX.

Design Systems

Reusable component libraries, consistent UI patterns, and scalable design tokens. Maintain brand consistency across all platforms.

App Store Success

Complete app store submission, optimization, and approval support. We handle TestFlight, Play Console, and post-launch monitoring.

PWA Expertise

Progressive Web Apps with offline capabilities, push notifications, and installability. Web reach with app-like experiences.

Accessibility First

WCAG AA compliance, screen reader support, keyboard navigation, and inclusive design. Build apps that work for everyone.

Our Development Services

End-to-end mobile app solutions from concept to App Store launch

Responsive Web Apps

Modern web applications with React and TypeScript
  • React 19 with TypeScript and hooks
  • Responsive design for all devices
  • Core Web Vitals optimization
  • SEO-friendly architecture
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Flutter Mobile Apps

Cross-platform iOS and Android apps with Flutter
  • Single codebase for iOS and Android
  • Native performance and animations
  • Material Design and Cupertino widgets
  • App store submission support
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Progressive Web Apps (PWA)

Installable web apps with offline capabilities
  • Offline-first architecture
  • Push notifications and background sync
  • Installable on home screen
  • Service worker caching strategies
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Design Systems & UI Libraries

Reusable component libraries and design tokens
  • Component libraries with Storybook
  • Design tokens and theming
  • Accessibility and responsive patterns
  • Documentation and usage guidelines
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React Native Development

Native mobile apps with JavaScript and React
  • React Native with Expo or bare workflow
  • Native modules and platform APIs
  • Over-the-air updates with CodePush
  • Performance optimization and profiling
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Analytics & Monitoring

Track user behavior and app performance
  • Google Analytics and Firebase integration
  • Custom event tracking and funnels
  • Error monitoring with Sentry
  • Performance metrics and dashboards
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Technologies We Use

Modern frameworks and tools for high-performance apps

Web Frameworks

Mobile Frameworks

State & Data

Testing & DevOps

Success Story: E-Commerce Mobile App

How we built a cross-platform shopping app with Flutter

The Challenge

A retail company needed a mobile shopping app for iOS and Android with limited budget and tight timeline. They wanted native performance, offline cart, and seamless checkout.

Our Solution

Results Achieved

10 weeks

From design to app store launch

40%

Lower development cost vs native

4.8★

Average app store rating

50K+

Downloads in first 3 months

Tech Stack:

Flexible Engagement Models

Choose the model that fits your app development needs

Dedicated Team

Full-time developers, designers, and QA engineers dedicated to your app. Best for ongoing development and feature additions.

Fixed-Scope Project

Well-defined app development projects with clear deliverables. Perfect for MVP launches and version releases.

Consulting & Advisory

Strategic guidance on technology choices, architecture, and best practices. Ideal for planning and code reviews.

Start Your App Development Project

Get a detailed proposal and timeline within 48 hours
100% Confidential, 24-Hour Response, No Commitment Required

Frequently Asked Questions

Common questions about web and mobile app development

Flutter is ideal for most use cases: 90% code sharing, native performance, and faster development. Go native (Swift/Kotlin) only if you need platform-specific features or have existing native codebases. We help you evaluate based on your requirements, budget, and timeline.

Yes. We implement offline-first architecture with local storage (SQLite, Hive), background sync, and conflict resolution. Users can work without connectivity and sync when back online. Perfect for field service, retail, and travel apps.

We handle the entire submission process: app store optimization, compliance with guidelines, beta testing via TestFlight/Play Console, and post-launch monitoring. Typical approval time is 1-3 days for iOS, same day for Android. We also provide ongoing support for updates.

Timeline varies: Simple app (8-10 weeks), Medium complexity (12-16 weeks), Enterprise app (16-24 weeks). We use agile sprints with weekly demos so you see progress continuously. MVP can be launched in 8-10 weeks with core features.

Yes, we offer maintenance packages including bug fixes, OS updates, feature enhancements, performance monitoring, and analytics review. We also provide 30-day warranty for any issues discovered after launch.

Costs vary: Simple app ($25K-$50K), Medium complexity ($50K-$100K), Enterprise app ($100K-$250K+). Cross-platform development with Flutter saves 30-40% compared to building separate native apps. We provide detailed estimates after understanding your requirements.

OUR DEVELOPMENT STANDARD

Built Under a Secure SDLC & Code Quality Framework

Every solution RannLab delivers is developed under a rigorous Secure Software Development Lifecycle (SDLC) — with mandatory code quality gates, AI code governance, security reviews at every phase, and zero-tolerance policies for critical vulnerabilities. This is not a checklist — it is the standard by which all our software is built.

Security at Every Phase

Threat modelling, SAST/DAST scanning, and security reviews built into every sprint.

Quality Gate Enforcement

Automated quality gates block deployments that fail coverage, complexity, or duplication thresholds.

AI Code Governance

All AI-assisted code is reviewed, tested, and validated before it enters the codebase.

CI/CD & Audit Trails

Every change is tracked, reviewed, and deployed through automated, auditable pipelines.

Ready to Build Your App?

Let’s create a stunning website that drives results for your business.