How much does it cost to build a mobile app?

A simple MVP typically costs $5,000-$15,000. A full-featured app with backend, authentication, payments, and push notifications ranges from $15,000-$50,000+. We provide fixed-price quotes after a free discovery call.

Should I build a native or cross-platform app?

For most businesses, cross-platform (React Native or Flutter) is the smart choice. You get iOS and Android from one codebase, reducing costs by 30-40%. We recommend native only when you need deep hardware integration or AR/VR capabilities.

How long does it take to develop a mobile app?

An MVP takes 6-8 weeks. A production-ready app with full features typically takes 12-20 weeks. We deliver in 2-week sprints with working builds you can test throughout the process.

Do you handle app store submission?

Yes, we handle the complete submission process for both Apple App Store and Google Play, including ASO optimisation, compliance review, screenshot design, and privacy policy preparation.

Can you build apps for both iOS and Android?

Absolutely. Using React Native or Flutter, we build for both platforms simultaneously from a single codebase. This means faster delivery, lower costs, and easier maintenance.

Do you provide app maintenance after launch?

Yes, we offer 30 days of free bug-fix support post-launch plus optional monthly retainer plans that include OS compatibility updates, feature enhancements, performance monitoring, and crash resolution.

What backend do you use for mobile apps?

We typically use Node.js with PostgreSQL for custom backends, Firebase or Supabase for rapid MVP development, and AWS Amplify for enterprise-scale applications. The choice depends on your scalability needs and budget.

Can you convert my website into a mobile app?

Yes. We can build a native mobile experience that leverages your existing web API, or create a Progressive Web App (PWA) for a lighter approach. We'll recommend the best strategy based on your goals and user expectations.

Starting from $5,000

Mobile App Development Company in Kolkata

Looking for a mobile app development company in Kolkata? Innovatrix Infotech designs and builds mobile applications that users love and businesses rely on. Our Kolkata-based team delivers production-ready iOS and Android apps with seamless UX, robust backend integration, and app store optimisation.

Innovatrix Infotech is a top-rated mobile app development company in Kolkata, India, serving startups and businesses across Kolkata, Bangalore, Delhi, Mumbai, the US, UK, and Australia. Based in Phoolbagan, Kolkata, we specialise in cross-platform development with React Native and Flutter, reducing time-to-market by up to 40%. Our mobile engineering team has shipped 20+ apps across e-commerce, healthcare, education, and fintech.

Cross-platform iOS & Android from a single codebase
60fps smooth animations and transitions
Offline-first architecture with local data sync
Push notifications and deep linking
App Store & Play Store optimisation
Analytics and crash reporting integrated

Get a Free App Quote Book a Discovery Call

50+ Clients Served

4+ Years in Business

UK/AUS/US Overlap

What we build

What does Mobile App Development Company in Kolkata include?

React Native App Development

Cross-platform mobile apps with near-native performance, shared codebase, and rapid iteration cycles.

Flutter App Development

Beautiful, natively compiled apps for mobile, web, and desktop from a single Dart codebase.

iOS App Development

Native Swift/SwiftUI apps optimised for the Apple ecosystem with Human Interface Guidelines compliance.

Android App Development

Native Kotlin apps following Material Design 3 guidelines with backward compatibility to Android 8+.

App Backend & API Development

Scalable REST and GraphQL backends, real-time WebSocket APIs, and cloud infrastructure for mobile apps.

App Maintenance & Updates

Ongoing bug fixes, OS compatibility updates, feature enhancements, and performance monitoring.

What's included

Everything you need to succeed with Mobile App Development Company in Kolkata

Cross-Platform Efficiency

One codebase, two platforms. React Native and Flutter let us deliver iOS and Android apps simultaneously, cutting development time by 40%.

Pixel-Perfect UI/UX

Custom animations, gesture handling, and platform-native design patterns that feel right on both iOS and Android.

Offline-First Architecture

Local storage, background sync, and conflict resolution ensure your app works reliably even without internet connectivity.

Secure & Compliant

Biometric authentication, encrypted storage, certificate pinning, and compliance with GDPR and app store security guidelines.

Why choose us

Why businesses trust us for Mobile App Development Company in Kolkata

Cost Savings

Single Codebase, Two Platforms

We deliver iOS and Android from one codebase using React Native or Flutter, saving you 30-40% on development costs.

Approval Rate

App Store Success

We handle ASO, screenshots, descriptions, and compliance to ensure smooth approval on both Apple App Store and Google Play.

0-8

Weeks to MVP

Rapid MVP Delivery

Get your minimum viable product to market in 6-8 weeks with core features, analytics, and user feedback loops.

0/7

Crash Monitoring

Post-Launch Analytics

Built-in crash reporting, user analytics, and A/B testing infrastructure to iterate based on real user data.

Our tech stack

Technologies we use for Mobile App Development Company in Kolkata

Frontend

React Native

Flutter

TypeScript

Swift

Kotlin

Backend

Node.js

Firebase

Supabase

Database

PostgreSQL

SQLite

DevOps

AWS Amplify

Fastlane

Tools

App Center

Detox / Maestro

Figma

How it works

Our process — start to finish

Discovery & Strategy

We define your app's core value proposition, target users, platform strategy (iOS, Android, or both), and feature prioritisation for MVP.

UX/UI Design

Interactive Figma prototypes with platform-native design patterns. User flow mapping, usability testing, and design system creation.

Agile Development

2-week sprints with working builds deployed to TestFlight/Firebase App Distribution. Regular demos and feedback integration.

Testing & QA

Automated E2E testing with Detox/Maestro, manual device testing across 15+ devices, performance profiling, and memory leak detection.

App Store Submission

Complete ASO optimisation, store listing creation, screenshot design, and compliance review for Apple App Store and Google Play.

Launch & Iterate

Staged rollout, crash monitoring setup, user analytics dashboard, and a roadmap for post-launch feature iterations.

Typical timeline: 12 weeks

Client stories

What our clients say

Honest words from people who've been through the process. No stock photos, no made-up companies.

“Innovatrix didn't just build our Shopify store — they thought through the whole customer journey. Our conversion rate went up 34% in the first month.”

Priya Mehta

Founder, Bloomfield Retail

“We've worked with three agencies before. Innovatrix is the first one that actually explained what they were doing and why. On time, on budget.”

Rahul Agarwal

Director, Operations, NovaTrade Logistics

“The AI automation workflow they set up saved our team 12 hours a week. We were skeptical about AI but they made it practical and measurable.”

Dr. Nandita Roy

Managing Director, Saffron Healthcare

Industries we serve

Industries we help with Mobile App Development Company in Kolkata

E-commerce & Retail

Shopping apps, loyalty programs, and mobile payment integrations.

Healthcare & Wellness

Patient apps, fitness trackers, and telemedicine platforms.

Food & Delivery

Ordering apps, driver tracking, and real-time delivery management.

Education & EdTech

Learning apps, classroom tools, and interactive course platforms.

Finance & Banking

Mobile banking, budgeting tools, and payment wallets.

Travel & Hospitality

Booking apps, itinerary planners, and review platforms.

Questions answered

Common questions about Mobile App Development Company in Kolkata

Still have questions?

Our team typically responds within 24 hours.

Get in touch

How we compare

Agency vs freelancer vs in-house

Feature	Our Approach	Freelancer	In-House
Cross-Platform	React Native / Flutter	Often native only	Usually native
Time to MVP	6-8 weeks	10-16 weeks	12-20 weeks
App Store Submission	Handled end-to-end	Often excluded	Internal process
Device Testing	15+ real devices	1-3 devices	Varies
Post-Launch Updates	Retainer plans available	Hourly billing	Ongoing salary
Cost Efficiency	40% less than native	Low but risky	Highest overhead

Cross-Platform

Our ApproachReact Native / Flutter

FreelancerOften native only

In-HouseUsually native

Time to MVP

Our Approach6-8 weeks

Freelancer10-16 weeks

In-House12-20 weeks

App Store Submission

Our ApproachHandled end-to-end

FreelancerOften excluded

In-HouseInternal process

Device Testing

Our Approach15+ real devices

Freelancer1-3 devices

In-HouseVaries

Post-Launch Updates

Our ApproachRetainer plans available

FreelancerHourly billing

In-HouseOngoing salary

Cost Efficiency

Our Approach40% less than native

FreelancerLow but risky

In-HouseHighest overhead

Get started

Ready to talk about your project?

Whether you have a clear brief or an idea on a napkin, we'd love to hear from you. Most projects start with a 30-minute call — no pressure, no sales pitch.

No upfront commitmentResponse within 24 hoursFixed-price quotes