Mobile App Development India —
iOS & Android, Done Right
React Native, Flutter, Swift, and Kotlin. We build mobile apps for ecommerce, SaaS, fintech, and enterprise — with real design, clean code, and App Store submission handled by us.
Choose Your Mobile Platform
We build on every major mobile platform. We'll recommend the right one — but the decision is yours.
React Native shares 80–90% of code between iOS and Android — significantly reducing development time and cost compared to two separate native apps. Facebook, Shopify, and Airbnb run React Native in production.
Best for
Flutter's custom rendering engine (Skia/Impeller) draws every pixel itself — no native UI components — which means identical appearance across iOS, Android, and even web. Best for design-heavy or animation-rich apps.
Best for
Swift native development gives you the deepest iOS integration — Apple Pencil, ARKit, Core ML, HealthKit, Apple Pay, widgets, and App Clips. No bridge overhead, no compatibility tradeoffs. Required for some App Store categories.
Best for
Kotlin with Jetpack Compose gives Android apps the most responsive, deeply integrated experience. Full access to Android-specific APIs (NFC, background services, widgets, OEM integrations) that cross-platform frameworks can't always reach.
Best for
Mobile App Services
MVP App Development
Take your idea from concept to a working app in 8–12 weeks. We scope the MVP, strip non-essential features, and launch the fastest version that proves your hypothesis. Ideal for startups and first-time app founders.
Ecommerce Mobile Apps
Shopify mobile apps via Storefront API, WooCommerce apps via REST/GraphQL, and custom ecommerce apps with product catalogues, cart, checkout, and payment gateway integration (Razorpay, Stripe, PayU).
App Redesign & Rebuild
Outdated app costing you ratings and users? We audit the UX, redesign in Figma, and rebuild — either migrating to React Native/Flutter or rebuilding native if performance demands it.
Backend API Development
Every app needs a backend. We build Node.js/Supabase APIs, Firebase real-time backends, and REST/GraphQL endpoints — plus push notifications (FCM / APNs), user auth, and file storage.
App Store Submission
App Store and Play Store submission handled end to end — screenshots, metadata, privacy manifest, review compliance. We've navigated Apple's review process for 50+ apps and know how to avoid rejection.
App Maintenance & Updates
OS updates break apps. We offer monthly retainer support — OS compatibility updates, dependency upgrades, crash monitoring via Sentry/Crashlytics, and feature additions. Minimum 12-month support commitment.
Platform Comparison
| Feature | React Native | Flutter | Swift (iOS) | Kotlin (Android) |
|---|---|---|---|---|
| Platform coverage | iOS + Android (1 codebase) | iOS + Android + Web | iOS only | Android only |
| Performance | Near-native | Near-native (custom renderer) | Native (best) | Native (best) |
| Development speed | Fast (shared code) | Fast (shared code) | Slower (single platform) | Slower (single platform) |
| Cost vs native | ~60% of 2 native apps | ~60% of 2 native apps | 100% | 100% |
| OS-specific features | Via bridged modules | Via platform channels | Full access | Full access |
| Best for | React devs, budget-conscious | Design-heavy, multi-platform | Apple-first, premium | Android-first, enterprise |
How We Build Mobile Apps
Discovery & Platform Decision
We review your requirements, target audience, technical constraints, and budget. We recommend the right platform (React Native, Flutter, or native) with clear reasoning — not a one-size-fits-all recommendation.
UI/UX Design in Figma
Every screen designed before any code is written. We follow iOS Human Interface Guidelines and Material Design 3 principles. You review and approve each screen in Figma — we don't start development until the design is signed off.
Sprint-Based Development
Development in two-week sprints with TestFlight / Firebase App Distribution builds for you to review at the end of each sprint. You see the app working on a real device — not just screenshots — every two weeks.
QA & Device Testing
Testing on physical iOS and Android devices across screen sizes and OS versions. We test all user flows, edge cases, network conditions, and interruptions (calls, notifications). Crash-free rate target: 99.5%+.
Launch & Post-Launch Support
App Store and Play Store submission handled by us. Post-launch: Crashlytics monitoring, user feedback review, and a 30-day bug fix window included. Optional ongoing maintenance retainer from Month 2.
Technology Stack
What Our Mobile App Clients Say
"Sigill built our React Native ecommerce app in 10 weeks — iOS and Android, connected to our Shopify store via Storefront API. The app has 4.8 stars on both stores and drives 35% of our monthly revenue."
"We came with an app idea and zero technical background. Sigill walked us through every decision — platform choice, MVP scope, backend architecture. The app launched on time and within budget. Couldn't ask for more."
"We needed a Flutter app to match our Android and iOS user base while keeping development costs manageable. Sigill delivered a pixel-perfect app that our designer was genuinely impressed by. The performance is exceptional."
Frequently Asked Questions
Both are excellent cross-platform frameworks. React Native is better if your team has JavaScript/React experience, you're building an ecommerce app (Shopify's mobile SDK is React Native-based), or you need strong community library support. Flutter is better if pixel-perfect UI fidelity is critical, you want to target iOS, Android, and web from one codebase, or you're building animation-heavy apps. We help you decide based on your specific requirements.
A simple React Native or Flutter app with 5–8 screens, user auth, and a backend API typically costs ₹3,50,000–₹8,00,000. A medium-complexity ecommerce app (product catalogue, cart, checkout, payment) costs ₹8,00,000–₹18,00,000. A complex app with real-time features, AI/ML, or native hardware integrations costs ₹18,00,000+. All projects are fixed-price.
A basic MVP with 6–8 screens typically takes 8–10 weeks. A mid-size ecommerce app takes 12–16 weeks. A complex app with multiple user roles, real-time features, and backend integration takes 16–24 weeks. Timeline is agreed in the proposal and project plan before work starts.
Yes — we build for both platforms. With React Native and Flutter we deliver both platforms from one codebase (reducing cost significantly). We also build native iOS (Swift) and native Android (Kotlin) apps when platform-specific performance or API access is required.
Yes — App Store and Play Store submission is included in every project. We prepare the screenshots, metadata, App Privacy details, and all required compliance information. For iOS, we handle Apple's review process including any resubmissions required. Average App Store approval time is 1–3 days for standard apps.
Yes — Razorpay, PayU, Cashfree, CCAvenue, and Paytm are all supported. We've integrated Indian payment gateways in 20+ mobile apps. We handle the full integration including the payment flow, refund handling, and webhook-based order confirmation.
Yes — we build Shopify-connected mobile apps using the Shopify Storefront API. These are custom-branded apps (not generic Shopify apps) that give your customers a native mobile shopping experience with your brand, your UX, and your features. We use React Native with Shopify's official Storefront GraphQL API.
The first 30 days post-launch are included: crash fixes, App Store review responses, and minor UI issues. From Month 2 onwards we offer a monthly retainer covering OS compatibility updates (Apple and Google each release major OS updates annually), dependency upgrades, crash monitoring via Sentry/Crashlytics, and feature additions.
Yes — push notifications via Firebase Cloud Messaging (Android) and Apple Push Notification Service (iOS) are standard in every app we build. We also configure notification permissions, deep linking (tapping a notification opens the right screen), and notification analytics.
Yes — we take on redesign and rebuild projects regularly. The process starts with a UX audit of the existing app (reviewing ratings, user feedback, and analytics), followed by Figma redesign, and then rebuild — either migrating the codebase or rebuilding from scratch depending on the state of the existing code.
Ready to Build Your Mobile App?
Tell us about your app idea — platform, target users, and key features. We'll recommend the right approach and send a fixed-price proposal.