Get In Touch
Ground Floor,Kitab Mahal 192,
D. N. Road, Azad Maidan,
Fort, Mumbai, Maharashtra India
Ph: +91.981.993.3339
Work Inquiries
info@catalystmi.com
+91.22.460.16261

Mobile Application Development

Performant, production-grade cross-platform iOS and Android apps

How We Build

We are more than app developer - we are architects who make the UX and engineering calls first.

React Native and Expo give you one codebase across iOS and Android, and we reach for native code only where a feature genuinely earns it.

A Mumbai-based team serving clients locally and internationally, we treat mobile app development as an architecture problem first. We interrogate the brief – what to build, what to integrate, what a third party does better. Features earn their place rather than landing by default, and that call shapes cost and timeline before any of it is locked.

Ideation & Strategy - choices that matter
Build - Design, Dev  &  Engineering
Scale, in audience  &  Team

Ideation & Strategy -
choices that matter

Before design or code, we pressure-test the brief. Build-versus-buy gets interrogated on every feature - hosted video over a self-built pipeline, third-party KYC over a compliance burden you own. If React Native fits, we say so.

Build - Design,
Dev & Engineering

Design in Figma, engineering in React Native and Expo, QA against performance, security, and store rules. Every AI-assisted change passes human and peer review, on an 80%+ coverage baseline. Store submission is part of the build.

Scale,
in audience & Team

We are with you beyond the build - updates, OTAs, new features, new releases. OTA updates through Expo ship priority fixes without a store review. Monitoring and telemetry are in from day one, and AMC options keep it maintained.

Ideation & Strategy - choices that matter

Ideation & Strategy -
choices that matter

Before design or code, we pressure-test the brief. Build-versus-buy gets interrogated on every feature - hosted video over a self-built pipeline, third-party KYC over a compliance burden you own. If React Native fits, we say so.

Build - Design, Dev  &  Engineering

Build - Design,
Dev & Engineering

Design in Figma, engineering in React Native and Expo, QA against performance, security, and store rules. Every AI-assisted change passes human and peer review, on an 80%+ coverage baseline. Store submission is part of the build.

Scale, in audience  &  Team

Scale,
in audience & Team

We are with you beyond the build - updates, OTAs, new features, new releases. OTA updates through Expo ship priority fixes without a store review. Monitoring and telemetry are in from day one, and AMC options keep it maintained.

Why Teams Choose Us

Production-grade, native quality, scale ready

Our approach to mobile app development builds in React Native because it puts iOS and Android on a single codebase without the wrapped-website feel that users notice in a second. The performance reads as native. Where a feature demands genuine native code, we write it. That is the honest version of cross-platform – one team, one vision, one build that behaves like two.

The depth shows on hard apps. We have shipped for BFSI and wealth management, where an app carries real money and real regulatory weight, alongside sports, entertainment, and e-commerce, where scale and engagement are the pressure. PII is encrypted, GDPR alignment is designed in rather than bolted on, and the App Store and Play Store review process is territory we have crossed enough times to know where submissions stall. AI is enabled, AI is augmented, every output is human validated – our C.L.A.R.I.T.Y. framework governs how AI is used across planning, coding, and testing, and a human owns the review layer on everything that ships. The team moves faster without cutting the check that keeps a banking app safe.

What We Offer

We cover every stage of your app - design, build, and support shaped around what the product needs.

Mobile app strategy and platform consulting session

Strategy & Consulting

Platform decision, build-vs-buy, feature roadmap

React Native and Expo mobile app development

App Development

React Native and Expo, native where it counts

Mobile app QA and security testing

QA & Testing

Performance, security, and store-compliance checks

Mobile app maintenance support and over-the-air updates

Maintenance & Support

AMC cover and OTA updates after launch

Mobile app UI and UX design in Figma

UI/UX Design

User flows and interfaces designed in Figma

Scalable mobile app backend and API development

Backend & API Development

Scalable backend and APIs built to carry the app

Mobile app maintenance support and over-the-air updates

Store Submission

App Store and Play Store submission, done right

Standard, not an Exception

We build apps that hold up under real money, real users, and real store review.

Native-quality performance from one React Native codebase

OTA updates via Expo - priority fixes, no store release

80%+ test coverage baseline on the app code

PII encryption and GDPR alignment for BFSI-grade apps

Deep-linking, push, and telemetry wired in from day one

App Store and Play Store submission navigated first-hand

Offline mode with real-time sync when back online

Statistics are a great icebreaker... here are a few opening numbers

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App of the Day wins
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App Downloads
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Technologies
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Pipelines Deployed
How we work

Some of the Recent Work crafted by our team

Jebel Ali Racecourse Website

CMI, Web & Mobile Application

Jebel Ali Racecourse Mobile App

CMI, Web & Mobile Application

Elevate Golf Mobile App

CMI, Web & Mobile Application

Kyoho.io Marketing Website

CMI, Web & Mobile Application

Kyoho.io Platform

CMI, Web & Mobile Application

JARC Web App

CMI, Web & Mobile Application

Our Engagement Models

How We Work Together

Choose the model that fits your project stage and how you want to work

Fixed bid engagement model for mobile app projects

Fixed Bid

Best when scope and timeline are defined upfront
Dedicated team engagement model for ongoing app development

Dedicated Team / RaaS

Engineers embedded with your team for the long run
Annual maintenance contract for mobile app support

Annual Maintenance Contract

Ongoing support and updates once the app is live

Frequently Asked Questions

Questions buyers ask

Straight answers on how we build mobile apps, what they cost to plan for, and how we decide between native and cross-platform.

What does an app cost in India?

Cost depends on scope, not a fixed rate card, so the honest answer is that it is scoped per project. We work out the real cost drivers first - feature depth, backend and integration load, compliance requirements, and how long the app needs support after launch. You get a documented technical proposal with the scope and cost before any code is written, so there are no surprises mid-build.

Native or cross-platform app?

For most apps, a single React Native codebase is the right call - it runs on iOS and Android with native-quality performance and one team maintaining it. Native code makes sense when a feature demands it, like heavy device-level work. We interrogate that during ideation and recommend React Native even when native would bill more, because the right architecture beats the bigger invoice.

Will it feel truly native?

We build in React Native and drop to native code wherever a feature genuinely needs it, so the app behaves like a purpose-built iOS or Android product rather than a wrapped website. Performance, gestures, and transitions are tested against real device behaviour. The wrapped-website feel that users notice in a second is exactly what we engineer out.

Do you handle store submission?

Yes - store submission is part of the build, not an afterthought handed back to you. We have navigated the App Store and Play Store review process enough times to know where submissions stall and how to clear them. That includes the store listing setup, compliance checks, and the review back-and-forth through to approval.

Can you build regulated apps?

Yes - we have shipped mobile apps for BFSI and wealth management, where the app carries real money and regulatory weight. PII is encrypted, GDPR alignment is designed in from the start, and every AI-assisted change passes human and peer review under our C.L.A.R.I.T.Y. framework. Our mobile lead's background is in banking apps, so regulated builds are familiar ground.

What happens after launch?

After launch, OTA updates through Expo let us ship fixes without waiting on a full store release, and monitoring flags performance issues early. Analytics and telemetry are wired in from day one, so you can see how the app performs in the wild. AMC options keep the app maintained and updated for the long run rather than leaving it to drift.

LOREM IPSUM DOLOR

Ready to Build the Future of Your Product?