React Native App Development
Cross-platform mobile apps with near-native performance, shared codebase, and rapid iteration cycles.
Starting from $5,000
Mobile App Development Company in Kolkata
We have shipped Flutter apps used by 370,000+ people. Not prototypes. Not MVPs that break on launch day. Production-grade mobile applications for D2C brands, fintech platforms, social audio networks, and B2B marketplaces — built by a 12-person engineering team based in Sector V, Kolkata. Innovatrix Infotech is a DPIIT-recognised mobile app development company in Kolkata. Our stack is Flutter-first, not React Native. That choice is deliberate: Flutter gives us a single codebase that delivers genuinely native performance on both iOS and Android, faster build cycles, and a UI rendering engine that does not depend on the platform's own components — which means your app looks and behaves identically on every device. Every app we build goes through the same engineering rigour we applied to Arre Voice (370K+ downloads, 4.5 stars on Play Store), Best Wallet (500K+ downloads, 60+ blockchain integrations), and Hello Astrologer (25,000 monthly active users, 89% consultation completion rate). These are not client names we drop for credibility — they are benchmarks for what a 12-person team operating from Kolkata can deliver when the architecture decisions are made correctly from day one. We work on fixed-price, 2-week sprint cycles. You see working software every fortnight. No retainer surprises. No billing for meetings. No scope creep that quietly triples your invoice.
- 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
50+ Clients Served
4+ Years in Business
UK/AUS/US Overlap
What we build
What does Mobile App Development Company in Kolkata include?
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
0%
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.
0%
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
Adored by visionaries
Discover what our community is sharing about their experience
“When two freelancers ran away with our money, we had lost all trust in agencies. Innovatrix didn't just rebuild our store — they rebuilt our confidence. Four years later, we've gone from one lakh to over one crore in revenue. They're not our vendor, they're our technology partner.”
G
Garima Ahuja
Co-founder, FloraSoul India
“Before this system, our team was glued to their phones all day just answering the same questions over and over. Now those hours are back, and our customers actually get faster responses than when we were doing it manually. Rishabh and his team understood our operations deeply before writing a single line of code.”
A
Aman Bahri
Director, Bandbox Group
“When two freelancers ran away with our money, we had lost all trust in agencies. Innovatrix didn't just rebuild our store — they rebuilt our confidence. Four years later, we've gone from one lakh to over one crore in revenue. They're not our vendor, they're our technology partner.”
G
Garima Ahuja
Co-founder, FloraSoul India
“Before this system, our team was glued to their phones all day just answering the same questions over and over. Now those hours are back, and our customers actually get faster responses than when we were doing it manually. Rishabh and his team understood our operations deeply before writing a single line of code.”
A
Aman Bahri
Director, Bandbox Group
“When two freelancers ran away with our money, we had lost all trust in agencies. Innovatrix didn't just rebuild our store — they rebuilt our confidence. Four years later, we've gone from one lakh to over one crore in revenue. They're not our vendor, they're our technology partner.”
G
Garima Ahuja
Co-founder, FloraSoul India
“Before this system, our team was glued to their phones all day just answering the same questions over and over. Now those hours are back, and our customers actually get faster responses than when we were doing it manually. Rishabh and his team understood our operations deeply before writing a single line of code.”
A
Aman Bahri
Director, Bandbox Group
“When two freelancers ran away with our money, we had lost all trust in agencies. Innovatrix didn't just rebuild our store — they rebuilt our confidence. Four years later, we've gone from one lakh to over one crore in revenue. They're not our vendor, they're our technology partner.”
G
Garima Ahuja
Co-founder, FloraSoul India
“Before this system, our team was glued to their phones all day just answering the same questions over and over. Now those hours are back, and our customers actually get faster responses than when we were doing it manually. Rishabh and his team understood our operations deeply before writing a single line of code.”
A
Aman Bahri
Director, Bandbox Group
“We had jewellery but no digital presence. Innovatrix gave us a Shopify store that actually feels like walking into a jewellery showroom. The tiered discounts and WhatsApp integration alone doubled our repeat customers. We went from zero online orders to processing 50+ orders a day within four months.”
M
Mukesh Sethiya
Founder, Zevarly
“We had jewellery but no digital presence. Innovatrix gave us a Shopify store that actually feels like walking into a jewellery showroom. The tiered discounts and WhatsApp integration alone doubled our repeat customers. We went from zero online orders to processing 50+ orders a day within four months.”
M
Mukesh Sethiya
Founder, Zevarly
“We had jewellery but no digital presence. Innovatrix gave us a Shopify store that actually feels like walking into a jewellery showroom. The tiered discounts and WhatsApp integration alone doubled our repeat customers. We went from zero online orders to processing 50+ orders a day within four months.”
M
Mukesh Sethiya
Founder, Zevarly
“We had jewellery but no digital presence. Innovatrix gave us a Shopify store that actually feels like walking into a jewellery showroom. The tiered discounts and WhatsApp integration alone doubled our repeat customers. We went from zero online orders to processing 50+ orders a day within four months.”
M
Mukesh Sethiya
Founder, Zevarly
“We had jewellery but no digital presence. Innovatrix gave us a Shopify store that actually feels like walking into a jewellery showroom. The tiered discounts and WhatsApp integration alone doubled our repeat customers. We went from zero online orders to processing 50+ orders a day within four months.”
M
Mukesh Sethiya
Founder, Zevarly
“We had jewellery but no digital presence. Innovatrix gave us a Shopify store that actually feels like walking into a jewellery showroom. The tiered discounts and WhatsApp integration alone doubled our repeat customers. We went from zero online orders to processing 50+ orders a day within four months.”
M
Mukesh Sethiya
Founder, Zevarly
“We had jewellery but no digital presence. Innovatrix gave us a Shopify store that actually feels like walking into a jewellery showroom. The tiered discounts and WhatsApp integration alone doubled our repeat customers. We went from zero online orders to processing 50+ orders a day within four months.”
M
Mukesh Sethiya
Founder, Zevarly
“We had jewellery but no digital presence. Innovatrix gave us a Shopify store that actually feels like walking into a jewellery showroom. The tiered discounts and WhatsApp integration alone doubled our repeat customers. We went from zero online orders to processing 50+ orders a day within four months.”
M
Mukesh Sethiya
Founder, Zevarly
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.
FAQs
Common questions about Mobile App Development Company in Kolkata
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
Certified PartnersRecognised by the platforms
Recognised by the platforms
you already trust.
Government registrations, platform partnerships, and ecosystem credentials that verify the operating standards behind every engagement.
Payment Options
Pay the way that works for you
We accept every major payment method globally — from cards and PayPal to international bank transfers, India-specific UPI, and direct NEFT/RTGS.
Stripe
Cards & digital wallets
Visa · Mastercard · Apple Pay · Google Pay · AMEX
PayPal
Global online payments
PayPal balance · Linked cards · Bank accounts
Wise
International bank transfer
USD · GBP · EUR · AUD · CAD · SGD · AED + 40 more
Razorpay
India — all local methods
UPI · Net Banking · Cards · Wallets · EMI
Bank Transfer
Direct NEFT / RTGS transfer
All Indian banks · Same-day RTGS · NEFT · IMPS
All transactions are processed securely. We never store card details.
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