How much does custom web application development cost?

Web development project costs vary based on complexity, feature scope, and third-party integrations. Focused MVP web applications typically range from $15,000 to $40,000 and launch in 4–8 weeks. Full-scale enterprise SaaS platforms with multi-tenancy, custom billing, and advanced dashboards typically range from $40,000 to $150,000+. We provide fixed-price milestone contracts or dedicated team retainers.

Who owns the source code and intellectual property (IP)?

You retain 100% full ownership of all intellectual property, source code, designs, and architectural documentation created during our engagement. Code is committed directly to your private GitHub or GitLab repository from day one.

What tech stack do you recommend for custom web apps?

We primarily architect with Next.js 15, React 19, TypeScript, TailwindCSS, Node.js, and PostgreSQL, deployed to Vercel or AWS. This stack guarantees Lighthouse 100 Core Web Vitals, enterprise security, rapid rendering via React Server Components, and seamless scale to millions of users.

Does your agency develop for both iOS and Android?

Yes. We build native iOS (Swift/SwiftUI), native Android (Kotlin), and cross-platform apps using React Native and Flutter. Cross-platform allows launching high-performance apps on both the Apple App Store and Google Play from a single unified codebase, cutting development costs and time-to-market by up to 40%.

Do you handle Apple App Store and Google Play approvals?

Yes, we provide end-to-end App Store and Google Play submission management. Our team handles certificate management, privacy declarations, screenshot generation, in-app purchase setups, and guidelines compliance with a 100% approval track record.

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Native iOS, Android & Cross-Platform Mobile App Agency

Mobile App Development Agency | iOS & Android Apps

For: Founders and businesses wanting to launch consumer or enterprise mobile applications on the Apple App Store and Google Play.

We design, build, and publish production-grade mobile applications for iOS and Android. Whether you need a high-performance native app built in Swift and Kotlin, or a rapid multi-platform launch with React Native or Flutter, our mobile engineering squad ensures 99.9% crash-free rates, offline-first resilience, and rapid App Store & Google Play approval.

Development Agency Service

Mobile App Development by Zaeon Systems

Hire our mobile app development agency to build native iOS, Android, React Native, or Flutter mobile applications. Top App Store approval rate with offline-first architecture.

Key Capabilities

→Native iOS (Swift & SwiftUI) & Android (Kotlin) Development
→Cross-Platform Apps with React Native & Flutter
→Offline-First Architecture & Real-Time Cloud Sync
→Biometric Authentication (FaceID/Fingerprint) & Secure Storage
→Push Notifications & In-App Messaging (Firebase / APNs)
→In-App Purchases (IAP) & Subscription Monetization (RevenueCat)

Industry Use Cases

Dual-platform launch from a single efficient codebase100% App Store & Google Play approval guarantee99.9% crash-free user sessions in productionSub-100ms offline data access & instant synchronization

Technologies Used

React NativeFlutterSwiftKotlinFirebaseSQLiteGraphQLFastlaneApple App StoreGoogle Play

Key Capabilities

Native iOS (Swift & SwiftUI) & Android (Kotlin) Development
Cross-Platform Apps with React Native & Flutter
Offline-First Architecture & Real-Time Cloud Sync
Biometric Authentication (FaceID/Fingerprint) & Secure Storage
Push Notifications & In-App Messaging (Firebase / APNs)
In-App Purchases (IAP) & Subscription Monetization (RevenueCat)

Business Outcomes

✓Dual-platform launch from a single efficient codebase
✓100% App Store & Google Play approval guarantee
✓99.9% crash-free user sessions in production
✓Sub-100ms offline data access & instant synchronization

Tech & Tools

React NativeFlutterSwiftKotlinFirebaseSQLiteGraphQLFastlaneApple App StoreGoogle Play

Discuss Your Project

What We Build

Mobile App Development Solutions We Deliver

Every project is engineered to production-grade standards with full source-code ownership, documentation, and post-launch SLA support.

B2C Mobile

Consumer Mobile Applications

Engaging B2C mobile apps with smooth onboarding, social login, push notifications, and subscription management.

Enterprise

Enterprise Mobility & Field Apps

Secure workforce apps with offline data capture, barcode/OCR scanning, geolocation tracking, and ERP integration.

Marketplace

On-Demand & Marketplace Apps

Real-time marketplace apps with driver/customer apps, live GPS tracking, in-app messaging, and automated payouts.

Secure Apps

Healthcare & Fintech Apps

HIPAA and PCI-DSS compliant mobile apps with biometric authentication, encrypted local storage, and audit logging.

How We Work

Our Mobile App Development Engagement Process

Product Architecture & Device Scope

We define feature scope, device compatibility (iOS/Android/tablets), offline requirements, and backend API contracts.

Mobile UI/UX & Micro-Interactions

Crafting platform-native human interface guidelines (Apple HIG and Google Material 3) with interactive mobile prototypes.

Core Engineering & API Integration

Building robust client architecture, local caching, push notification infrastructure, and secure backend connectors.

Device Lab Testing & Optimization

Testing across 50+ real physical iOS and Android devices for performance, battery consumption, memory leaks, and network edge cases.

App Store Submission & Launch

Handling all Apple App Store and Google Play compliance, metadata, screenshots, and review approvals with guaranteed release.

What You Receive

Project Deliverables

Every mobile app development engagement includes full handover with 100% IP ownership and 30-day post-launch warranty.

iOS & Android Production Builds

Signed IPAs and AABs ready for immediate App Store and Google Play distribution.

100% Source Code & Repositories

Full ownership of Flutter or React Native codebases with automated Fastlane build scripts.

Backend API & Admin Portal

Scalable backend services, database schemas, and web portal to manage mobile app content.

Post-Launch Monitoring

Integrated Sentry / Crashlytics error monitoring and 30-day warranty support.

Frequently Asked Questions – Mobile App Development

Common questions about Zaeon Systems' Mobile App Development agency services, pricing, timeline, and technology stack.

Hiring Zaeon Systems starts with a free 30-minute discovery call where we review your project requirements, user journeys, timeline, and tech stack preferences. Within 48 hours, we provide a detailed scope breakdown, technical architecture proposal, and transparent pricing estimate. Once approved, our dedicated engineering squad can onboard within 5 business days.

Get Started Today

Ready to Build Something Extraordinary?

Book a free strategy call with our engineering team. No commitments -just an honest conversation about building software that scales your business.

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