Service

Mobile App Development - iOS & Android

Cross-platform React Native apps for iOS and Android, backed by a clean Laravel API. Business apps, marketplaces, and field service tools built for reliability — not just the demo.

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★★★★★ Trusted by startups, SMEs & growing brands

16+

Years Experience

1050+

Projects Delivered

India · USA · UK

Client Reach

AI · React · WP

Core Stack

Kautuk Bhatnagar

Sr. Full Stack Developer

16+ years building products for startups and enterprises.

Why Work With Me

SEO-first development by default

Direct access to senior developer — no account managers

Full code ownership on delivery WordPress + Laravel + AI capability in one engagement

Business-first, not design-only execution

Clients: Startups · SaaS · eCommerce · WordPress

Credentials: CSM · PM · iOS · Android

Available for new projects

Why Mobile App Projects Fail

Sound Familiar?

Building native when cross-platform would do

Native iOS + Android development means two codebases, two teams, and 2× the maintenance cost. For most business apps, React Native delivers 95% of the native experience at half the cost.

An app with no backend strategy

A mobile app without a well-designed API is a fragile system. Data sync issues, inconsistent state, and security vulnerabilities start at the architecture stage — not the frontend.

App store rejections after months of work

Apple and Google reject apps for privacy policy gaps, missing permission descriptions, and policy violations. Teams that don't build for review criteria from day one waste weeks on resubmissions.

Performance that degrades over time

Memory leaks, unnecessary re-renders, unoptimised image loading, and blocking the main thread. Apps that are fast at launch and sluggish after 3 updates.

No plan for updates and maintenance

React Native and native SDKs require ongoing updates. Apps abandoned for 12 months often stop working when OS updates ship. Mobile is not a launch-and-forget platform.

The Solution

Here's How I Fix It

I build cross-platform mobile apps in React Native with a clean Laravel API backend — a combination that delivers fast, reliable apps on iOS and Android from a single codebase. Architecture-first development, built-in performance discipline, and deployment pipelines that make ongoing updates routine.

Discuss Your Project

Mobile App Development Services

Everything You Need, Nothing You Don't

React Native App Development

react native developer india

Cross-platform iOS and Android apps from a single React Native codebase. Business apps, marketplaces, field service tools, and consumer apps. Native-quality UI with shared business logic - shipped faster and maintained more cost-effectively than two native apps.

Flutter App Development

Flutter App developer india

Build cross-platform mobile apps in Flutter for iOS and Android from a single codebase. Ideal for startup MVPs, business apps, customer portals, and internal tools. Fast UI, strong performance, and lower development cost than maintaining separate native apps.

Mobile API & Backend Development

mobile app backend developer india

Laravel-based REST APIs designed specifically for mobile: offline sync support, push notification infrastructure, device management, JWT auth, and efficient data payloads. The backend that makes your app reliable - not just the part users see.

Existing App Rescue & Refactoring

mobile app refactoring india

If your React Native app has become slow, buggy, or impossible to update without breaking something, I can audit and systematically improve it. Performance profiling, architecture clean-up, and dependency updates done without rewriting from scratch.

App Store Submission & Compliance

app store submission service india

End-to-end App Store (Apple) and Play Store (Google) submission: asset preparation, privacy policy, permission descriptions, review guideline compliance, and handling rejections. I have submitted dozens of apps and know what reviewers look for.

Mobile App Maintenance Retainer

mobile app maintenance india

Monthly retainer covering React Native version updates, SDK upgrades, OS compatibility testing, bug fixes, and performance monitoring. Prevents the app from degrading into a support liability as the platform evolves.

My Mobile App Development Process

From Brief to Launch

Discovery & UX Flow

Map the core user journeys before writing any code. Define the screens, data requirements, and API contracts. Mobile UX mistakes are expensive to fix after development - getting this right upfront is the most valuable hour we spend together.

API Design

Design the backend API for the mobile use case: payload sizes, offline-first considerations, real-time requirements, and auth flow. The API contract is agreed before frontend development starts.

Parallel Development

Backend API and React Native app built in parallel with agreed contract. Regular builds deployed to TestFlight and Google Play Internal Track so you test on real devices throughout development.

Performance & Device Testing

Profiled on real low-end devices (not just flagship emulators), tested across OS versions, and validated on both iOS and Android edge cases. Performance issues fixed before launch, not after reviews.

App Store Submission

Asset preparation, compliance review, and submission to both stores. Post-launch monitoring for crash reports and performance regressions. I stay on until the app is approved and live.

Portfolio

Real Projects. Real Results.

View All →

Food & Beverage

Tinga.ca - React native App and Backend with AI Integration

Tinga.ca needed a complete online presence - They needed a single place to plan groceries with perso...

Wedding Planner

PlanMyWedding - AI-Powered Wedding Management Web App

Plan My Wedding- a wedding planning and marketplace in one place: couples plan the wedding (lists, b...

PropTech

PropFlow — SaaS MVP from Idea to Paying Customers in 8 Weeks

A UK property investor had a validated idea for a deal-tracking SaaS but no technical co-founder. Pr...

Why Choose Me for Mobile Development

The Safer, Better Decision.

Not every developer will tell you when an approach doesn't make sense. I will.

Work With Me

Full stack: app + API + infrastructure

I build the entire system - React Native / Flutter frontend, Laravel API backend, and deployment pipeline. No handoffs between specialists. One person who understands how all the pieces fit together.

Performance as a first-class concern

I profile apps on real mid-range devices, not just the latest iPhone. Frame drops, memory leaks, and startup time are measured and fixed before launch.

Cross-platform without compromise

React Native apps I build are indistinguishable from native to most users. Where native modules are genuinely required, I use them — with a clear trade-off discussion before committing.

App store experience

I have handled Apple and Google submissions for dozens of apps — including edge cases, rejections, and appeal processes. You will not be surprised by the review process.

You own the code

Full source code, documentation, and deployment credentials delivered at launch. No vendor lock-in, no proprietary platform dependency.

FAQ

Questions About
Mobile App Development - iOS & Android

Answers to the most common questions before you decide to work with me.

Ask a Question

A focused business mobile app (field service, internal tool, or simple consumer app) typically starts from Rs 2L–3.5L for iOS + Android via React Native. Apps with complex real-time features, payment flows, or marketplace dynamics range from Rs 4L–10L. I provide fixed-price quotes after scoping.

For most business apps, cross-platform React Native is the right call — it delivers 95% of the native experience at roughly 60% of the cost. Native makes sense when you need deep hardware integration (AR/VR, Bluetooth, camera processing) or when your app's UI needs to feel indistinguishable from a platform's own apps. I'll give you an honest recommendation based on your requirements.

A focused single-purpose app takes 8–12 weeks from a clear spec. A marketplace or multi-role app with backend takes 14–20 weeks. The biggest variable is how well-defined the requirements are at the start — which is why I invest in a discovery sprint.

Yes — I build the complete system, including the Laravel REST API backend, database, push notification infrastructure, and deployment. Building the API alongside the app (rather than handing off to a separate backend team) prevents the most common class of mobile app problems.

Yes. If you have an existing Laravel or API-driven web platform, I can add a mobile app that consumes the same API — extending your product to mobile without rebuilding the backend. I'll audit the existing API first to identify any changes needed for the mobile use case.

Yes - both stores, including asset preparation, compliance review, privacy policy requirements, and handling any rejections. Apple's review process in particular has many non-obvious requirements that trip up first-time submitters. I've been through it enough times to prepare properly.

Yes. I start with a technical audit covering architecture, performance profiling, dependency state, and test coverage. Then I propose a prioritised improvement plan. React Native apps that have been through multiple developers often have fixable structural issues that cause ongoing fragility.

Yes - a monthly maintenance retainer covers React Native updates, OS compatibility testing, bug fixes, and performance monitoring. Mobile is not a launch-and-forget platform; the OS updates twice a year and the app stores' policies evolve constantly.

Ready to Start?

Ready to Start Your Mobile App Development - iOS & Android Project?

Tell me what you need and I'll give you a clear scope, honest recommendation, and no-obligation quote.

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Mobile App Development — Serving Clients Globally

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