Flutter · React Native · KMP · PWA
Cross-Platform App Development Company That Picks the Right Framework Before Writing the First Line of Code
Flutter, React Native, Kotlin Multiplatform, or PWA — we recommend the framework that fits your product, team, and roadmap, not the one we prefer this quarter. One codebase, iOS and Android on launch day, and a written scope so you know what you are paying for.
- ✓Framework-agnostic — Flutter, React Native, KMP, and PWA on the shelf, chosen per project
- ✓One codebase shipping to both stores — MVP in 6 to 10 weeks, production release in 12 to 16
- ✓Fixed-scope pricing in INR or USD — quotes from ₹4,00,000 or USD $8,000
- ✓Store submission, screenshots, privacy declarations, and reviewer follow-ups included
- ✓Source code, backend, and store accounts stay in your name from day one
Why cross-platform is the honest default in 2026 (and when it is not)
A cross-platform app is a single codebase — one team, one repository, one release pipeline — that ships to both the App Store and Google Play at the same time. Ten years ago the trade-off was real: cross-platform apps looked good in demos and fell apart the moment a user tried to scroll a long list on a mid-range Android phone. That gap has closed. Flutter renders at 60 or 120 frames per second on hardware most Indian users actually own, and React Native's new architecture with Hermes and Fabric matches native performance on the flows that matter — lists, transitions, keyboard, camera preview.
For the majority of consumer and B2B apps we quote in 2026, cross-platform is now the honest default. You get iOS and Android on the same day for close to the price of one native build. You get a hiring pool that has caught up with native developers — a Flutter engineer in Ahmedabad or a React Native engineer in Bangalore is no longer harder to find than a Kotlin developer. You get feature parity, because a bug fix or a new screen ships once, not twice.
Where cross-platform still does not fit, we say so on the discovery call. Camera-first products with heavy computer vision, AR through ARKit or ARCore with custom shaders, games with real-time physics, apps that need MDM kiosk mode with vendor-specific hooks, or products where a single millisecond of interaction latency changes the metric — these still call for native Swift on iOS and native Kotlin on Android. Everything else — and it is a very large everything — is honestly served by cross-platform.
When to choose cross-platform over native, hybrid, or a PWA
The framework arrives from the requirement, not the other way around. Below is the decision matrix we run through on the first call. Nothing here is dogma — a product with two of the three "choose native" signals is often still a Flutter build, and a PWA can be the right answer for a product that "sounds like" a mobile app on paper.
Choose cross-platform (Flutter or React Native) when the product is a consumer or B2B app with standard UI patterns — sign-up, browse, order, pay, notify, retain — and you need it in both stores on launch day. Choose it when the product roadmap has two years of feature releases ahead and you would rather ship the same feature once than twice. Choose it when the founder has a fixed budget and the choice is between a Flutter MVP that ships in eight weeks or a native MVP that ships in sixteen for the same money.
Choose native when the product is hardware-first — AR, custom Bluetooth stacks, HealthKit or Google Fit deep integration, camera pipelines that use platform-specific sensors, or a game with real-time physics. Choose native when the product is enterprise-first with MDM, kiosk, or SSO patterns that vendors like Intune, Kandji, or Jamf only support natively. Choose native when a specific millisecond of latency changes the KPI — high-frequency trading, live-auction bidding, real-time video conferencing.
Choose a PWA when the "app" is really a booking flow, a portal, an event guide, a menu, or a short-lived campaign. When store review cycles cost more than they add, when install friction is a real barrier, when SEO matters more than push notifications, a PWA is the honest answer. It costs meaningfully less and ships in weeks, not months.
Choose hybrid (Cordova, Ionic on the WebView) almost never. The old cost advantage is gone, the UX is a giveaway on the first tap, and every app store now scrutinises WebView-heavy apps. If Ionic Capacitor is on the table, treat it as a variant of the PWA path with a native shell, not as a real cross-platform alternative to Flutter or React Native.
- ›Cross-platform: iOS + Android in one codebase, standard UI, tight budget, fast MVP
- ›Native: AR, hardware-heavy camera, real-time physics, MDM kiosk, sub-100 ms latency
- ›PWA: bookings, portals, event guides, menus, SEO-first, no push-heavy retention loop
- ›Hybrid WebView: legacy stack you inherited, not for a green-field project in 2026
- ›Two of three signals point cross-platform for the majority of new consumer and B2B apps
- ›Native and cross-platform can co-exist — Flutter shell with a native module for AR or camera
The four frameworks we work in — Flutter, React Native, Kotlin Multiplatform, PWA
Framework selection is a decision worth taking seriously. Below is what each one is actually good at, and what it is not.
Flutter is our most-used cross-platform framework and the default recommendation for most new builds. Dart is a small, strict, easy-to-learn language. The Impeller rendering engine on iOS and the Skia-based renderer on Android give you 60 or 120 frames per second across the entire supported device range. The widget ecosystem is deep enough that ninety percent of screens are one Pub.dev package and an hour of styling away. Firebase, Riverpod, and Bloc cover state and backend patterns for almost every product shape. Flutter is where we recommend most founders start.
React Native is the right pick when your team already runs on React and TypeScript for the web, and the mobile app has to be maintained in-house after we hand it over. The new architecture — Hermes engine, Fabric renderer, Turbo Modules — has closed most of the historical performance gap. Expo has matured into a real production framework, not just a prototyping tool. If your CTO and your engineering team are React-native (pun tolerated) in mindset, React Native is a completely reasonable pick.
Kotlin Multiplatform sits in a third lane. It is not a UI framework — it lets you share business logic, networking, and data models between iOS and Android while keeping the UI native SwiftUI on iOS and Jetpack Compose on Android. This is the right pick for teams that already have native iOS and Android developers and want to stop duplicating the middle layer. It is not a "one team ships both platforms" solution — it is a "two native teams share the boring parts" solution.
Progressive Web Apps use the browser as the runtime. Service workers, web push (limited on iOS), Add to Home Screen, and offline caching cover most of what a native app does for content-first products. A PWA costs meaningfully less, ships without a store review, and remains searchable on Google. For a booking site, an event guide, a menu, or a portal that a user visits weekly rather than daily, a PWA is often the right answer that nobody quotes because it is not a "real app project".
Our cross-platform build process — seven steps, no surprises
We use the same discipline for every cross-platform app regardless of framework. Each phase has a signed-off deliverable, and no phase starts until the previous one is closed. This is the seven-step pattern the pillar app-development service runs on, applied to the cross-platform stack.
- ›Discovery — 30 to 60 minute call to map the user journey, the core loop, and the integrations the app needs
- ›Framework recommendation — a one-page memo naming Flutter, React Native, KMP, or PWA and the reasoning behind it
- ›Blueprint and fixed-price scope — wireframes, screen inventory, integrations, milestone timeline, and a fixed-INR or USD quotation
- ›UI design in Figma — screen-by-screen mockups reviewed before any code is written
- ›Sprint development — weekly demos on a real device, TestFlight or Firebase App Distribution builds in your hands every Friday
- ›Store submission — App Store Connect and Google Play Console listings, screenshots, privacy declarations, reviewer follow-ups
- ›Go-live and 90-day post-launch support — bug fixes, OS-update patches, and store-review follow-ups included
The tech stack we run for cross-platform builds
Front-end frameworks: Flutter 3 with Dart 3, or React Native 0.75 with TypeScript. State management: Riverpod or Bloc for Flutter; Zustand or Redux Toolkit for React Native. Navigation: go_router on Flutter; React Navigation on RN. Local database and offline mode: Isar or Drift on Flutter; WatermelonDB or MMKV on RN. Native modules: platform channels or Pigeon on Flutter; Turbo Modules on RN.
Backend and API: Laravel or Node.js with REST and GraphQL, hosted on AWS, Google Cloud, or DigitalOcean on your account. Database: MySQL or PostgreSQL for relational, Firebase Firestore for real-time and offline sync. Auth: Firebase Authentication, Auth0, or a Laravel Sanctum API depending on the product.
Analytics and observability: Firebase Analytics, Mixpanel, or Amplitude for product analytics; Firebase Crashlytics or Sentry for crash reporting. Push notifications: Firebase Cloud Messaging with Apple Push Notification service on the iOS side, unified through OneSignal when the marketing team needs a lifecycle dashboard.
Payments: Stripe, Razorpay, PayU, Apple in-app purchases, and Google Play Billing — unified through RevenueCat for subscription apps so purchase state stays consistent across both stores. CI/CD: Codemagic, Bitrise, or Fastlane with automated App Store and Play Store deployment so releases ship in minutes, not hours.
The stack is chosen for total cost of ownership. Nothing on this list locks you to a proprietary vendor — every layer has an escape hatch, and if you ever hire another team, they can pick up the codebase without a translation guide.
What actually moves the price — cost drivers for cross-platform builds
Cross-platform app pricing sits in the same range as our pillar app-development quotes because the framework choice does not, by itself, halve the cost. What the framework does is halve the maintenance cost over the lifetime of the app — you fix a bug once, ship a feature once, run one CI pipeline.
A compact cross-platform MVP with sign-up, one core flow, payments, and a single admin dashboard starts at around ₹4,00,000 in India or USD $8,000 for US clients. Mid-sized apps with multi-role users, offline mode, in-app purchases, and third-party integrations sit in the ₹8 to ₹20 lakh range or USD $18,000 to $45,000. Larger builds with mobile plus web plus admin plus a hardened backend land higher, always against a written scope.
Five things move the price in real projects. The number of user roles and the permission matrix — a single-role consumer app is meaningfully cheaper than a three-role marketplace with buyer, seller, and admin. Offline mode and conflict resolution — building offline-first from day one adds cost, but retrofitting it after launch costs more. Payment complexity — a single Razorpay checkout is cheap; recurring subscriptions with proration, refunds, and dunning is a separate module. Third-party integrations — every ERP, CRM, or logistics platform we plug into adds discovery time, and half of them have API quirks that only appear in production. Store submission complexity — a payment-heavy app or a healthcare app spends more cycles on reviewer follow-up than a content app does.
We quote fixed-scope after discovery, so the number in your quotation is the number you pay. Milestone-based invoicing means you never pay for work that has not been demonstrated. When someone quotes you a "starting price" without asking about roles, offline mode, or integrations, that quote will grow.
Common cross-platform mistakes — what we help you avoid
Fourteen years of custom software work, and the mobile-project mistakes that cost the most tend to repeat. Cross-platform projects add three of their own on top of the pillar list.
The first is treating cross-platform as a silver bullet. Flutter and React Native are excellent tools, but they are not free. A hardware-heavy product will still fight the framework's abstraction layer, and force-fitting a native use case into cross-platform is where projects go over budget. If AR, custom camera pipelines, or CoreBluetooth are on the roadmap, we architect the cross-platform shell with a native module bridge from day one — not as a phase-two firefight.
The second is picking a framework based on the developer's preference instead of the product's fit. A Flutter shop will quote Flutter, and a React Native shop will quote React Native, regardless of what the app actually needs. Our framework recommendation is a separate deliverable — a one-page memo, signed off before scope work begins, that spells out why the framework we picked fits your product, team, and roadmap.
The third is under-investing in the store submission phase. Cross-platform apps get scrutinised on both stores at once, and the failure modes are different — Apple rejects for privacy nutrition label mismatches and missing account-deletion flows; Google flags Data Safety declarations that do not match runtime behaviour. Every cross-platform build we ship includes a submission-phase checklist that maps app permissions to declarations on both stores before the first upload — that is what turns a two-week submission cycle into a two-day one.
The next step — a free framework decision call
Framework choice is the highest-leverage decision on a cross-platform app project, and it is worth twenty minutes with someone who has shipped in all four frameworks before writing a single line of code. On the call we will ask about the product, the users, the roadmap, and the team that will maintain the app after launch. You will leave the call with a one-page memo naming Flutter, React Native, Kotlin Multiplatform, or PWA, and a fixed-scope quotation to follow.
You can also read the broader pillar page at Mobile App Development for how our full app engagement works, or the Mobile CRM App Development page if the cross-platform build is going to plug into a CRM you already run.
Call +91-99245-12890, email the team, or fill the enquiry form. We answer the same working day, in your time zone.
Cross-platform questions founders and product teams ask us most
Framework choice, cost, timelines, feature parity with native, and what happens when a specific screen genuinely needs native code. If yours isn’t here, our team will answer it on the first call.
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