RED SAG is a mobile app development company in Tiruppur, India, offering iOS and Android app development from one cross-platform codebase in React Native or Flutter. One build ships to both the App Store and Google Play, so you pay for one app instead of two and every feature reaches all your users on the same day.
Our mobile app development services cover the whole job, not just the screens: the backend and APIs your app talks to, user accounts, push notifications, in-app payments, analytics and the store submission itself. Most of our work is for fintech, commerce, booking and internal business apps where reliability matters more than animations.
If you are still working out how to build a mobile app for your idea, start with a call. Before any code is written you get a fixed-price quote tied to a written scope. Design, development, testing and launch are broken into milestones with a test build on your phone at each one. When the app goes live, the source code, store accounts and cloud infrastructure are in your name, not ours.
Founders who need a working MVP in front of real users quickly. Our mobile app development for startups keeps version one small, on a codebase that can grow instead of being thrown away after the first funding round.
Lenders, wallets, investment platforms and collection agents who need secure login, transaction history, KYC flows and payment gateway integration done properly.
Businesses that want customers to order, book or reorder from their phone. For ecommerce mobile app development we connect the app to your existing store, stock and payments, with loyalty, offers and notifications that bring people back.
Operations that run on paper or WhatsApp today and need an app for sales reps, delivery staff or technicians, including offline use and photo capture.

We recommend React Native when you already have a JavaScript or React web team, and Flutter when pixel-consistent custom UI matters most. Both compile to real native apps, not wrapped websites, and both are used in large production apps.
Our Android app development services and iOS app development services come from the same team and the same code. If most of your customers use Android phones, as is common in India, we can launch on Google Play first and add the App Store later without rewriting anything.
Most apps need a server for accounts, data and business rules. We build it in Node.js with PostgreSQL, or use Firebase or Supabase when that is faster and cheaper for your stage, and document every endpoint.
Razorpay, Stripe and PayPal integrations for physical goods and services, plus Apple and Google in-app purchase for digital subscriptions where the store rules require it. We explain which rule applies before you commit to a pricing model.
Transactional and marketing notifications through Firebase Cloud Messaging and Apple Push Notification service, with deep links that open the right screen and user-level preferences so people can control what they receive.
Token-based authentication, biometric login, encrypted storage for sensitive values, certificate pinning where appropriate and no secrets baked into the app bundle. For fintech apps we also plan audit logs and session timeouts from day one.
Apps for field staff or users on patchy mobile data keep working offline, queue actions locally and sync when the connection returns, with clear conflict rules so data is never silently overwritten.
A web dashboard where your staff manage users, orders, content, offers and notifications without asking a developer. It is built alongside the app and shares the same backend, so there is one source of truth.
We prepare screenshots, privacy disclosures, data-safety forms and review notes, submit to both stores from your developer accounts and deal with any reviewer questions or rejections until the app is approved.
A call or two to understand your users, the core journeys and what must be in version one. You receive a written scope, a screen list and a fixed-price quote.
Wireframes for every key screen, then clickable Figma designs you can test on your own phone before development starts. Changes here are cheap; changes after coding are not.
Development in two-week sprints with a test build on your phone at the end of each one, through TestFlight for iOS and an internal testing track for Android.
Functional testing on a range of real devices and OS versions, fixes, then submission to the App Store and Google Play with all listing assets and policy forms completed.
A free bug-fix period after launch, crash monitoring, and an optional monthly plan for OS updates, new features and store policy changes.
The three bands below work as mobile app development packages: pick the closest one and we quote a fixed price for your exact scope. A focused MVP usually takes 8–12 weeks from signed scope to store launch, while a full business or fintech app typically takes 4–6 months.
₹1.75–3.5 lakh (≈ $2,600–5,600)
One core user journey, login, basic admin panel, push notifications and store launch on both platforms. Suits validating an idea with real users.
₹3.5–9 lakh (≈ $5,600–13,500)
Multiple user roles, payment gateway, bookings or orders, a full admin panel, analytics and integrations with one or two existing systems such as a CRM or ERP.
₹9–21 lakh+ (≈ $13,500–31,500+)
KYC, wallets or ledgers, multi-sided marketplaces, real-time features, audit trails and heavier security work. Priced after a paid discovery phase.
Indicative budgets based on typical projects. Your fixed-price quote depends on scope, integrations and timeline.
You know the cost before we start, and Tiruppur costs make affordable mobile app development possible without dropping testing or store launch. If you add features mid-project, we quote the change separately so the budget never drifts without your say.
Apps are published from your Apple and Google developer accounts and the repository is yours from the first commit, so you are never locked in to us.
You get a shared channel with the people writing your app, not a chain of account managers. Questions get answered by someone who knows the code.
Our India-based team overlaps with UK and European mornings and US evenings or early mornings, and we schedule calls around your day rather than ours.
For a cross-platform app built by our team, a focused MVP typically costs ₹1.75–3.5 lakh (roughly $2,600–5,600), and a full business app ₹3.5–9 lakh. Because one codebase covers both platforms, Android app development cost and iOS app development cost are not two separate bills. The main cost drivers are the number of user roles, payment and third-party integrations, and how much custom backend logic is involved. We give a fixed mobile app development quote after a short scoping call.
Most people looking up how to build an Android app are really asking where to start. Begin with the one journey that matters most to your customers, such as ordering, booking or paying, and leave the rest for later. We turn that into wireframes and a clickable design, build it in React Native or Flutter with a test build on your phone every two weeks, and release it on Google Play. The same code can go to the App Store whenever you are ready for iPhone users.
Both are mature and both produce apps that feel native. React Native is a good fit if you already have a React web app or JavaScript developers, because code and skills carry over. Flutter gives very consistent custom UI across devices. For most business apps either works; we recommend one based on your team and design, not our preference.
For the large majority of business, commerce, booking and fintech apps, yes. Users will not notice a difference in speed or feel. Fully native Swift and Kotlin still makes sense for apps built around heavy 3D graphics, advanced camera processing or very new OS features. When you genuinely need native modules, React Native and Flutter can include them.
You need an Apple Developer Program membership, which costs $99 per year, and a Google Play developer account with a one-time $25 fee. Both should be registered in your company name, and you need a privacy policy URL. We prepare the listings, screenshots and compliance forms and submit on your behalf. Apple reviews most apps within a day or two, though first submissions can take longer; new Google Play accounts may face extra checks, including closed testing for personal accounts. We build this buffer into the launch plan.
Yes. For physical goods and real-world services we integrate gateways like Razorpay, Stripe or PayPal. For digital content or subscriptions used inside the app, Apple and Google generally require their own in-app purchase systems, which take a commission. We check which rules apply to your model early, because it affects pricing.
Yes. The code lives in a Git repository you own, and the backend runs on cloud accounts in your name. When the project is paid for, all rights to the custom code are yours. You can keep working with us, bring the work in-house or hand it to another team.
Every project includes a free bug-fix period after launch. After that, most clients take a monthly support plan that covers OS and library updates, store policy changes, crash fixes and a set number of hours for small improvements. New features can also be quoted as separate fixed-price phases.
We are based in Tiruppur, Tamil Nadu, and provide mobile app development services in India and abroad remotely, over video calls, WhatsApp and shared test builds. If you are weighing an Android app development company in your own city against a remote team, look at how often you will see real progress: with us it is a build on your phone every two weeks and answers from the developers themselves.
Rankings of top mobile app development companies are often sponsored, so judge on evidence instead. Install apps the team has actually shipped, ask who will write your code, insist on a written scope with a fixed price, and confirm the code and store accounts will be in your name. The same checks apply whether you are hiring an iOS app development company or a cross-platform team. A cheap mobile app development quote that leaves out the backend, testing or store launch usually costs more later.
Payment gateway and UPI integration, lending systems, wallets, eKYC and fintech MVPs built with audit-ready foundations.
Reservation and appointment systems with live availability, deposits, WhatsApp/SMS reminders and staff dashboards for hotels, clinics, salons and more.
Shopify, WooCommerce and headless Next.js stores with payments, shipping integrations and B2B ordering for D2C and export brands.
We work with clients in India, United States, United Kingdom, Australia, Canada, Europe and New Zealand.
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