iOS + Android, one codebase

Mobile App Development for iOS and Android

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.

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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.

Who it's for

Who Mobile Apps is for

Startups building a first version

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.

Fintech and payments businesses

Lenders, wallets, investment platforms and collection agents who need secure login, transaction history, KYC flows and payment gateway integration done properly.

Retailers, restaurants and service brands

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.

Companies with field or internal teams

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.

Designer sketching mobile app wireframes on paper beside a smartphone and desktop computer
Designer sketching mobile app wireframes on paper beside a smartphone and desktop computer
What you get

Features we build

React Native or Flutter, chosen for your case

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.

Android-first or iOS-first when it suits you

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.

Backend and APIs included

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.

Payments that work in your market

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.

Push notifications and messaging

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.

Security for money and personal data

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.

Offline support and poor-network handling

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.

Admin panel for your team

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.

App store submission handled

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.

How we work

From first call to launch

  1. 01

    Discovery and scope

    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.

  2. 02

    UX flows and UI design

    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.

  3. 03

    Build in short sprints

    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.

  4. 04

    Testing and store launch

    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.

  5. 05

    Post-launch support

    A free bug-fix period after launch, crash monitoring, and an optional monthly plan for OS updates, new features and store policy changes.

Deliverables

What you receive

  • iOS and Android apps published under your developer accounts
  • Full source code in your own Git repository
  • Backend API with documentation
  • Web admin panel for your team
  • Figma design files for every screen
  • Push notification and analytics setup
  • Payment gateway integration tested with live credentials
  • Deployment and release guide for future updates
  • Post-launch bug-fix support period
Cost & timeline

What Mobile Apps costs

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.

Show prices in

MVP app

₹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.

Business app

₹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.

Fintech or marketplace app

₹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.

Free estimate

Get your price in one working day

Two fields. No obligation, no spam.

Technology

Tools and technology we use

  • React Native
  • Flutter
  • TypeScript
  • Dart
  • Expo
  • Node.js
  • PostgreSQL
  • Firebase
  • Supabase
  • Firebase Cloud Messaging
  • Stripe
  • Razorpay
  • Figma
  • AWS
Why RED SAG

Why teams choose us

Fixed price against a written scope

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.

Your code, your accounts

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.

Talk to the developers directly

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.

Working hours that overlap with yours

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.

FAQ

Frequently asked questions

How much does mobile app development cost in India?

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.

How do I build an Android app for my business?

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.

Should I choose React Native or Flutter?

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.

Is a cross-platform app as good as a native app?

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.

What do I need to publish on the App Store and Google Play?

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.

Can you add in-app payments?

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.

Will I own the source code?

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.

What happens after the app launches?

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.

Do you offer mobile app development near me, or only remotely?

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.

How do I choose the best mobile app development company?

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.

Planning Mobile Apps? Let's talk.

Share a few lines about your idea. We reply within one working day with questions, a rough budget and the next step, with no obligation.

  • Reply within one working day
  • Fixed-price quote, no obligation
  • You own the code and the data
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