Freelance Android & iOS App Developer
Build Modern, Scalable & User-Friendly Mobile Apps for Android and iOS
From concept to Play Store and App Store deployment. I engineer high-performance native and cross-platform mobile apps designed for seamless user experience, rock-solid security, and rapid business growth.
Dedicated Mobile App Developer for Android & iOS
With over 12 years of hands-on software engineering experience, I specialize in translating commercial requirements into elegant, high-retention mobile applications. Whether you need a native Android and iOS build or an ultra-efficient cross-platform codebase, I deliver end-to-end mobile solutions from scratch.
Android & iOS App Development
Custom mobile engineering tailored to platform-specific guidelines—Google Material Design 3 for Android and Apple Human Interface Guidelines for iOS—ensuring genuine native feel.
Native & Cross-Platform Solutions
Expertise across pure native stacks (Kotlin & Swift) as well as modern unified frameworks (Flutter & React Native) that reduce development costs and release cycles by 50%.
Custom Business Applications
Tailored enterprise workflow mobile apps, field sales tracking, internal management portals, and customer loyalty platforms engineered around exact operational goals.
Startup & E-commerce Apps
Fast-turnaround MVP apps, scalable mCommerce catalogs, instant search, frictionless in-app checkouts, and customer retention loops built to secure funding and scale revenue.
Android & iOS App Development Services
Complete end-to-end mobile development lifecycle—from architectural wireframing and native code crafting to secure backend API integration and seamless Play Store and App Store publishing.
Android App Development
High-performance native Android applications built using modern Kotlin, Android SDK, and Jetpack Compose. Engineered for smooth compatibility across thousands of Android devices.
- Kotlin & Jetpack Compose UI
- Google Play Store compliance
- Offline SQLite / Room database sync
iOS App Development
Sleek, fluid iOS applications crafted for iPhone, iPad, and Apple Watch with Swift, SwiftUI, Apple Pay, Biometric FaceID, and strict adherence to Apple Human Interface Guidelines.
- Swift & SwiftUI native performance
- App Store Connect & TestFlight setup
- Apple Pay & FaceID biometrics
Flutter App Development
Cross-platform apps built with Google Dart-powered Flutter framework, rendering stunning 60fps native graphics on both Android and iOS from a single, maintainable codebase.
- Single codebase for iOS & Android
- Custom widget UI architecture
- Rapid market release & hot reload
React Native App Development
Native-feel cross-platform apps engineered with React Native and TypeScript, allowing seamless sharing of logic and state management between your web portals and mobile clients.
- Shared React web & mobile logic
- Native bridging modules (Expo/CLI)
- Over-The-Air (OTA) updates
Cross-Platform App Development
Strategic mobile architecture delivering identical high-fidelity brand experiences across iOS and Android with half the engineering budget and simplified single-team ongoing updates.
- Unified UI/UX design language
- Simultaneous multi-store releases
- Lower total cost of ownership
Custom Mobile App Development
Bespoke mobile software engineered around your unique proprietary business logic, data models, and end-user journeys—never generic cookie-cutter templates or unscalable builders.
- 100% custom-crafted source code
- Tailored database architectures
- Full IP and code ownership
Business App Development
Robust corporate mobile tools designed to streamline daily workflows, empower field technicians, track mobile assets, and connect front-line teams with central corporate ERPs.
- Role-based operational access
- Offline work order synchronization
- Automated PDF report generation
E-commerce App Development
High-converting mobile shopping applications featuring rapid catalog browsing, instant multi-attribute search, wishlists, abandoned cart push notifications, and frictionless 1-click checkouts.
- Integrated payment gateways
- Real-time inventory synchronization
- Automated order tracking alerts
SaaS Mobile Apps
Scalable mobile companions for SaaS products, incorporating multi-tenant authentication, tiered subscription access, in-app purchases (IAP), and real-time cloud notifications.
- Apple & Google In-App Purchases
- Multi-tenant data segregation
- Cross-device session management
Existing App Enhancement & Maintenance
Already have an existing Android or iOS app suffering from slow performance, outdated SDKs, or frequent crashes? I take over existing codebases, resolve technical debt, upgrade to modern Android 14+ and iOS 18+ standards, refactor buggy APIs, and introduce high-value new features.
Mobile Apps I Can Build
Over 12 years of domain engineering across diverse business verticals. I build custom, market-ready mobile applications tailored precisely for your industry workflows and target customers.
Business Apps
Custom enterprise mobile solutions for task management, employee attendance, field force tracking, and automated document approvals.
E-commerce Apps
Full-scale mCommerce apps with product variations, multi-tier search filters, persistent cart, discount vouchers, and fast 1-click checkout.
Food Delivery Apps
Multi-restaurant ordering applications complete with live menu management, kitchen dispatch dashboard, and real-time delivery boy GPS tracking.
Booking & Appointment Apps
Interactive scheduling systems for clinics, salons, fitness studios, and professional consultants with automated calendar sync and reminders.
Education & LMS Apps
Comprehensive learning platforms featuring video streaming, offline course downloads, interactive quizzes, student progress cards, and certificate issuance.
Healthcare Apps
Secure telehealth mobile platforms with doctor video consultation, electronic health record (EHR) storage, prescription management, and medicine refills.
Real Estate Apps
Property listing and discovery mobile apps with interactive map filters, high-resolution photo galleries, virtual tours, and agent WhatsApp inquiries.
Hotel Management Apps
Mobile guest portals for contactless room check-in, keyless digital entry, digital room service ordering, and hotel amenity reservations.
CRM & Business Apps
Mobile customer relationship platforms for sales executives to record client meetings, manage sales pipelines, update deals, and review target quotas on the move.
Marketplace Apps
Two-sided multi-vendor platforms connecting buyers and sellers with escrow wallet payouts, vendor storefronts, rating systems, and admin commission rules.
Social & Community Apps
Modern community mobile applications featuring dynamic feeds, story updates, direct 1-to-1 messaging, group chats, push notifications, and content moderation.
Custom Mobile Applications
Bespoke mobile software engineered specifically for unique intellectual property, hardware integrations (BLE, NFC, IoT), and specialized commercial algorithms.
Robust App Features & Functionality
Every mobile application is built with modern, enterprise-ready features designed to provide flawless user journeys, maximum engagement, and unshakeable operational reliability.
User Registration & Login
Frictionless onboarding with email, OTP verification, passwordless magic links, and biometric Fingerprint/FaceID login.
User Profiles
Personalized user dashboards with customizable profile avatars, saved preferences, delivery addresses, and account security.
Push Notifications
Targeted real-time notifications via Firebase Cloud Messaging (FCM) and Apple APNs with deep linking and rich interactive media.
GPS & Location
Precise real-time geolocation tracking, interactive Google Maps / Apple MapKit views, geofencing, and route distance calculation.
Search & Filters
Instant predictive search with autocomplete, category hierarchies, multi-attribute filter facets, and sorting algorithms.
Chat & Messaging
Low-latency in-app chat built with WebSockets, typing indicators, read receipts, photo sharing, and automated bot support.
Payment Gateway
Secure tokenized payments via Stripe, Razorpay, Apple Pay, Google Pay, and UPI with PCI-DSS certified in-app checkouts.
Shopping Cart
Persistent shopping cart synchronization across devices, coupon discount calculations, automatic tax logic, and quick checkout.
Booking System
Interactive calendar time-slot selection, timezone conversions, buffer windows, automated rescheduling, and calendar sync.
Reviews & Ratings
Verified customer review modules with 5-star ratings, photo feedback uploads, helpfulness upvotes, and merchant reply management.
File & Image Upload
Direct camera capture and gallery uploads with client-side image compression and direct S3/Cloudinary cloud storage pipelines.
Social Login
One-tap authentication with Google Sign-In, Sign in with Apple, Facebook, and WhatsApp login credentials.
Real-Time Updates
Instant live state updates for order statuses, courier tracking, stock availability, and bidirectional WebSocket syncing.
Admin Dashboard
Powerful web companion backoffice and mobile admin portal for user management, real-time analytics, order moderation, and system settings.
Android & iOS Technology Stack
I leverage modern, battle-tested programming languages, mobile frameworks, and scalable cloud infrastructure to build mobile apps that are fast, secure, and easily maintainable.
Android
Kotlin, Java, Jetpack Compose, Material 3, Android SDK & Studio
iOS
Swift, SwiftUI, UIKit, Xcode, CocoaPods & Swift Package Manager
Flutter
Google Dart, Bloc, Provider, Riverpod, 60fps Native Skia Rendering
React Native
TypeScript, Expo, Redux Toolkit, React Navigation, Native Bridge
JavaScript
Modern ES6+, Asynchronous reactive code, Event loops, Modular packages
TypeScript
Strict static type safety, interfaces, scalable mobile codebase architecture
React.js
Companion web admin panels, management backoffices, component libraries
Node.js
High-throughput Express / NestJS microservices, WebSockets, real-time sync
PHP / Laravel
Robust RESTful APIs, Eloquent ORM, Laravel Sanctum token security
REST API
JSON endpoints, rate limiting, OpenAPI / Swagger specs, JWT auth
Firebase
Firestore, Cloud Functions, Cloud Messaging (FCM), Crashlytics
MySQL
Relational schemas, transactional integrity (ACID), optimized query indexes
MongoDB
High-speed NoSQL document storage, flexible dynamic JSON schemas, horizontal scaling
PostgreSQL
Advanced open-source relational database, JSONB support, and PostGIS geolocation indexing
API, Payment & Third-Party Integration
Powering your mobile apps with seamless connectivity to global payment gateways, mapping services, notification pipelines, and enterprise software ecosystems.
REST APIs
High-speed JSON communication, robust caching headers, rate limiting, and defensive error handling.
GraphQL
Precise declarative data fetching via Apollo Client, reducing mobile network bandwidth by eliminating over-fetching.
Razorpay
India's leading payment gateway with UPI auto-pay, credit/debit cards, net banking, and instant webhooks.
Stripe
Global credit card processing across 135+ currencies, recurring subscriptions, Apple Pay, and Google Pay SDK.
PayPal
Trusted cross-border payments, buyer protection checkout, and automated multi-currency payout processing.
Cashfree
Instant vendor disbursements, automated bank account verification, UPI payments, and payment links.
Google Maps
Live route navigation, address autocomplete, geolocation pins, and distance matrix computation.
Firebase
Real-time Firestore databases, push notifications via FCM, Crashlytics diagnostics, and remote config.
WhatsApp API
Automated order confirmations, delivery tracking updates, booking reminders, and direct live support chat.
SMS & Email APIs
Twilio, SendGrid, and AWS SES integration for mission-critical OTPs, password resets, and transaction alerts.
CRM / ERP Integration
Bi-directional data synchronization with Zoho, Salesforce, HubSpot, SAP, and custom corporate databases.
Custom API Integration
Seamlessly connecting bespoke internal legacy databases, specialized microservices, and third-party SaaS portals.
App Security, Performance & Store Publishing
Enterprise-grade architectural standards that protect user data, optimize CPU and battery consumption, and ensure seamless approvals on both Google Play Store and Apple App Store.
Secure Authentication
OAuth 2.0, short-lived JWT token rotation, refresh tokens, encrypted biometric keychain storage, and two-factor authentication.
Role-Based Access
Granular authorization guarding endpoints and UI views for superadmins, merchants, delivery drivers, and regular customers.
API Security
SSL/TLS encryption, HMAC signature verification, API rate limiting, and SSL certificate pinning to prevent man-in-the-middle attacks.
Data Validation
Strict payload schema sanitization on both mobile client and server to block SQL injection, XSS, and payload tampering attempts.
Secure Payment Processing
Zero credit card data stored locally on device. Certified PCI-DSS tokenized transactions via secure native gateway SDKs.
App Performance Optimization
Silky 60fps rendering, leak-free memory management, lazy component rendering, and minimal background battery consumption.
Image & Asset Optimization
Automated WebP graphic compression, vector icon rendering, multi-resolution asset slicing, and aggressive local cache caching.
Crash Monitoring
Real-time exception logging with Firebase Crashlytics and Sentry, pinpointing stack traces and OS issues before users notice.
Google Play Store Publishing
Generation of signed Android App Bundles (.aab), Google Play Console management, target SDK compliance, and review approval.
Apple App Store Publishing
Preparation of iOS production archives (.ipa), App Store Connect metadata, TestFlight internal/external beta testing, and privacy manifests.
App Updates & Maintenance
Proactive OS compatibility updates for new Android (Android 14+) and iOS (iOS 18+) releases, routine security patching, and bug fixes.
8-Step Android & iOS App Development Process
A structured, transparent workflow ensuring your project progresses smoothly from the initial vision to official store approval and continuous live scaling.
Requirement Discussion
Comprehensive discovery call to analyze target users, core business models, competitive landscape, and monetization strategy.
App Planning & Features
Defining user personas, feature backlog, technical stack selection (Native vs Cross-Platform), and sprint milestone timelines.
UI/UX Design
Interactive Figma wireframing, component design systems, and responsive prototypes strictly aligned with Android and iOS standards.
Android / iOS Development
Writing clean, maintainable, modular source code utilizing Kotlin/Swift or Flutter/React Native with robust local state handling.
Backend & API Integration
Connecting fast RESTful/GraphQL APIs, implementing database schemas, integrating cloud notifications, and payment gateways.
Testing & Optimization
Rigorous multi-device QA on physical Android and iOS hardware, validating memory, network throttling, battery, and edge cases.
Store Submission
Generating production builds, metadata copy, screenshots, app privacy documentation, and handling Google & Apple store reviews.
Launch & Maintenance
Official release to users, real-time crash triage via Crashlytics, performance analytics, and ongoing monthly updates.
Featured Android & iOS Mobile Apps
Browse a selection of real-world mobile applications delivered for global startups, enterprises, and high-growth consumer brands.
Tyrewaale On-Demand Booking
On-demand tyre fitment mobile booking app featuring real-time technician GPS tracking, live inventory matching, and instant UPI checkout.
Livlite Telehealth Companion
Cross-platform telehealth mobile application with doctor video consultation scheduling, recurring subscription billing, and encrypted health records.
Humanaid Pharma Store App
Healthcare mCommerce application with medicine catalog search, doctor prescription upload verification, order status alerts, and wallet checkout.
5Edge Financial Portfolio
Personal wealth tracking mobile app with real-time portfolio returns, market data charting, biometric FaceID authorization, and encrypted asset storage.
Top One Percent Education
High-scale learning app featuring encrypted video streaming, offline test taking, real-time percentile scoring, and push notification reminders.
Slay Pilates Studio App
Boutique wellness mobile booking app for class scheduling, instructor availability, class bundle purchasing, and automated QR code check-ins.
Android & iOS App Development FAQs
Clear, honest answers to common questions about hiring a freelance mobile app developer, pricing, platform choices, store publishing, and maintenance.
Need an Android & iOS App Developer?
Let's turn your mobile app idea into a professional Android and iOS application. Direct senior developer collaboration, transparent milestone pricing, and 100% intellectual property ownership.
Get free business consultation Today
Feel free to contact me any time
Surya Nager, New Delhi, Delhi
info@ajaykumarthakur.in
+91 846-8805-153