
Flutter App Development
One codebase. Android and iOS. Half the wait.
We build Flutter apps for Indian startups and businesses: one codebase that runs smoothly on Android and iOS, launched on both stores for close to…
One codebase. Two app stores. Shared logic with your web product.. Cartel Planet builds React Native apps for Indian startups and businesses: one JavaScript/TypeScript codebase that runs natively on Android and iOS, reuses logic from your React website, and ships to both stores. You get a fixed price in writing, a weekly demo on a live build, and full ownership of the code and store accounts.
We reply within one working day — with questions or a first scope.
Every React Native project we take on covers the full journey from idea to live app, not just the coding in the middle. You get product discovery and a written scope, UX research and a clickable prototype, UI design for both platforms, React Native development in TypeScript, backend and API integration, payment gateway and third-party integrations, testing on real Android and iOS devices, Play Store and App Store submission, and post-launch monitoring. Source code, design files, store accounts and cloud accounts are all set up and handed over in your company's name.
React Native is the right choice when you need to be on both Android and iOS without paying for two separate teams. It suits:
Most agencies quote low, build fast and disappear when the first one-star review arrives. We work the other way round. You see a clickable prototype before development starts, so you are approving a real experience, not a requirements document. You get a fixed price in writing, so the budget does not move halfway through. You see working software every week on a live build, not a big reveal at the end. And we design for the phones and networks India actually uses, testing on budget Android devices and slow connections, not just the latest flagship. After launch, a three-month stabilisation window means we fix what real users find, at no extra cost.
We follow five clear stages: Understand, Plan, Build, Test, and Launch & Grow. A free discovery call leads to a written scope with a fixed price and timeline. Design comes first as a clickable prototype, then development runs in weekly sprints with a demo every week. Before launch, every screen is tested for speed, security, device compatibility and edge cases. We then handle store submission, go-live, 30 days of free support and team training.
A single React Native codebase typically cuts development and maintenance effort compared to building two native apps, lets you release features on Android and iOS on the same day, and allows web and mobile teams to share code and skills. With over-the-air updates, small fixes reach users within hours instead of waiting for store review. And because React Native renders real native components, your users get an app that looks and feels like it belongs on their phone.
Cartel Planet is a full-service IT company, so your app is not built in isolation. The same team can handle your UI/UX, backend, admin panel, website and the digital marketing that brings in your first users. Pricing is published and fixed in writing, every invoice carries GST, and everything we build is handed over in your name. You talk to real people on call, chat and WhatsApp, and our relationship does not end at launch day.
A clickable prototype of your app that you can test with real users and investors before development begins, so changes cost hours, not weeks.
A single TypeScript codebase that compiles to genuine native Android and iOS apps, keeping features, fixes and releases in sync across both platforms.
Business logic, API layers, validation and state management can be shared with your React or Next.js website, reducing duplicate work and bugs.
Local storage and smart sync let your app keep working on slow or patchy networks and update automatically when the connection returns.
Built on React Native’s modern architecture with the Hermes engine, plus custom native modules in Kotlin and Swift for camera, Bluetooth, maps or heavy processing.
Razorpay, PhonePe, Paytm, Stripe, UPI intents, WhatsApp, SMS OTP, Google Maps, Firebase and your existing CRM or ERP, connected and tested.
Push bug fixes and small content changes directly to users without waiting days for App Store or Play Store review.
Segmented push notifications, deep links and event tracking so you know how users behave and can bring them back.
Play Store and App Store listings, screenshots, privacy declarations, reviews and releases managed end to end, under your own developer accounts.
Crash monitoring from day one and a three-month window after launch to fix anything real users find.
A free discovery call about your users, business model, numbers and deadline. We tell you honestly whether React Native, Flutter or native is the best fit, and if we’re not the right team, we say so.
A written scope covering features, screens, integrations, cost, timeline and what we need from you. Fixed price, signed before work starts.
User flows, wireframes and a clickable prototype for Android and iOS. You test it, share it and approve it before development begins.
Development in weekly sprints with a demo every week on a live test build you can install on your own phone. No black boxes, no surprises.
Speed, security, crash, accessibility and device testing on real Android and iOS phones, including budget devices and slow networks, against our pre-launch checklist.
Store submission, go-live, 30 days of free support and team training, followed by a three-month stabilisation window and an optional care plan for updates and new features.





Founders, marketing heads and operations teams on what it was like to build with us — and what changed after launch.
Our buyers in labs and industry used to call us just to check a spec. Now the full catalogue is online with exact details, and bulk enquiries come in with the right information from the start. Cartel Planet understood how a precision-parts business actually sells.

We wanted to sell our honey, agarbattis and masalas directly and tell the hive-to-jar story behind them. Cartel Planet built a store that does both. Customers now see why our products are worth the price.

We publish job notifications, admit cards and results all day. The portal Cartel Planet built stays fast under that volume, and our readers can filter to exactly what they need.

We list plots, apartments, villas and commercial property across four states. Before, buyers couldn’t narrow anything down. Now they filter in seconds, and the enquiries we get are for properties that actually fit them.

We sell software to schools, hospitals and labs, plus hosting, training and SMS. Our old site made everyone read about everything. Cartel Planet restructured it so each visitor lands on what’s relevant to them.

We used to send PDFs and photos to dentists one chat at a time, and printed catalogues went stale immediately. Now it’s one link that’s always up to date. It saves us hours every week.

Straight answers on cost, timelines, ownership and support. Can't find yours? Ask us — a real person replies within one working day.
At Cartel Planet, React Native apps typically cost ₹3,50,000 – ₹15,00,000. A focused MVP sits at the lower end, while apps with complex backends, real-time features, multiple user roles or heavy integrations sit higher. You receive a fixed number in writing before we start.
Most projects take 8–20 weeks. A lean MVP can be live in about 8–10 weeks; feature-rich apps with admin panels and integrations take longer. Your scope document includes a week-by-week timeline.
Yes. React Native powers apps used by millions of people worldwide, and its modern architecture delivers smooth, native-quality performance for the vast majority of business apps, including eCommerce, booking, fintech, education and field-service apps.
Both are excellent cross-platform options. React Native is usually the better fit if you already have a React or Next.js website, a JavaScript team, or want to share logic between web and mobile. Flutter can suit apps with highly custom, animation-heavy interfaces. On the discovery call we recommend whichever genuinely suits your product, since we build with both.
In most cases, yes. Business logic, API calls, validation rules, state management and parts of your design system can often be shared. UI components are rebuilt for mobile so the app feels native.
We build offline-first where your use case needs it. Data is stored locally, actions are queued, and everything syncs automatically when the connection returns, which is essential for field teams and users in tier-2 and tier-3 cities
Yes. We prepare listings, screenshots, privacy declarations and builds, manage the review process and handle rejections, all under developer accounts registered in your company’s name.
You do. Source code, design files, store accounts, cloud accounts and analytics are all set up in your name and fully handed over.
Yes. We audit your current Android and iOS apps, plan a phased migration so users aren’t disrupted, and move you onto a single maintainable codebase.
You get 30 days of free support and training, plus a three-month stabilisation window to fix issues real users find. After that, an optional care plan covers OS updates, library upgrades, security patches and new features.
Book a free 45-minute call. We’ll review your idea, recommend the right approach and give you a clear, fixed quote for your React Native app, with no obligation and no pushy sales follow-ups.
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