Mobile App Development Services for iOS, Android and Cross-Platform Builds

We build custom mobile applications for iOS, Android, and cross-platform deployment. Our primary framework is Flutter for new builds delivering a single codebase across iOS, Android, web, and desktop. We also build in React Native for teams with existing JavaScript expertise, and in Swift and SwiftUI for native iOS requirements.

Every app is backed by a Python FastAPI or Node.js backend, integrated with Firebase or PostgreSQL, and deployed to the App Store and Google Play via Fastlane CI/CD. Where your product requires AI features chatbots, semantic search, predictive recommendations we integrate those directly into the mobile build.

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Our Partners

Mobile App Development Services iOS, Android, Cross-Platform, AI Integration & Web

As a leading company we cover the full mobile app development lifecycle from UX design and platform selection through development, testing, and App Store deployment. Below are the services we deliver across mobile, web, and AI-powered product builds.

AI App Development

Flutter App Development

WebRTC Development

ChatGPT Integration

Web App Development

Machine Learning

Cross-platform App Development

Hybrid App Development

React Native App Development

iOS App Development

Progressive Web App Development

UX/UI Design

Cross-Platform Mobile App Development Flutter, React Native & Progressive Web Apps

Cross-Platform Mobile App Development Flutter, React
Native & Progressive Web Apps

We build cross-platform mobile applications using Flutter and React Native, and browser-based applications using Progressive Web App architecture. Each approach suits different project requirements, team expertise, and deployment targets. Below is what each one covers.

Flutter App Development

Flutter is our primary framework for new cross-platform builds. It uses a single Dart codebase to deploy to iOS, Android, web, and desktop simultaneously which means both platforms are delivered in the same sprint cycle and at the same cost as a single native build. We architect Flutter applications with clean separation of UI and business logic, Bloc or Riverpod state management, Firebase or REST API backend integration, and CI/CD deployment via Fastlane and GitHub Actions. Every Flutter app is profiled with Flutter DevTools before App Store submission to resolve frame drops and memory issues before they reach users.

React Native Mobile App Solution

React Native is a strong choice when your team has existing JavaScript and React expertise, or when you have an existing React web codebase that shares business logic with the mobile app. We build React Native applications using TypeScript, React Navigation, Redux or Zustand state management, and Firebase or REST API integration. For device features without community library support, we write custom Swift and Kotlin native modules and bridge them directly into the React Native app.

Progressive Web App (PWA) Development

Progressive Web Apps run in the browser but behave like installed mobile applications supporting offline access, push notifications, home screen installation, and fast load performance across devices and network conditions. We build PWAs using Next.js with service workers, Web App Manifests, and Lighthouse PWA optimisation. They are a practical choice when you need broad device reach without the cost and complexity of separate App Store and Google Play submissions.

Mobile App Development Technology Stack Flutter, FastAPI, AI Integration & Cloud Infrastructure

Mobile App Development Technology Stack Flutter,
FastAPI, AI Integration & Cloud Infrastructure

Our primary mobile framework is Flutter. It delivers a single codebase across iOS, Android, web, and desktop which reduces development time and maintenance overhead without sacrificing UI consistency across platforms.
Backend systems are built on Python FastAPI or Node.js, depending on the performance and ecosystem requirements of your product. Data is handled by PostgreSQL for relational workloads or Firebase for real-time sync requirements.
For AI features, we integrate OpenAI API and LangChain for RAG-based chatbot systems, or TensorFlow and PyTorch for custom model training where your use case requires it. Pinecone manages vector databases for semantic search and knowledge base retrieval.
Cloud deployment runs on AWS or GCP with Docker containerisation. CI/CD pipelines run via GitHub Actions for backend services and Fastlane for mobile App Store and Google Play releases.
Every technology in this stack is selected for its performance track record in live deployments — not because it is new.

AI & Intelligent Systems

LLM Integration

RAG Systems

AI Agents

TensorFlow

PyTorch

Python

Cross-Platform Development

Flutter

Dart

iOS

Android

Backend & Cloud Architecture

Node.js

FastAPI

PostgreSQL

Firebase

AWS

Docker

Kubernetes

Data Engineering

BigQuery

Data Pipelines

Analytics Systems

AI & Intelligent Systems

LLM Integration

RAG Systems

AI Agents

TensorFlow

PyTorch

Python

Cross-Platform Development

Flutter

Dart

iOS

Android

Backend & Cloud Architecture

Node.js

FastAPI

PostgreSQL

Firebase

AWS

Docker

Kubernetes

Data
Engineering

BigQuery

Data Pipelines

Analytics Systems

Mobile App Development Process 4 Phases From Discovery to Post-Launch Support

Mobile App Development Process 4 Phases From
Discovery to Post-Launch Support

Every mobile app project follows a structured four-phase process — starting with product scoping before any design or code begins, and ending with active post-launch support rather than a handover and close.

Discovery & Scoping

We begin with a structured discovery session covering your product goals, target users, platform requirements, and technical constraints. This is not a generic intake form. We map the right framework Flutter, React Native, or native iOS against your specific use case, team expertise, and deployment timeline. This phase produces a documented product specification, technology stack recommendation, and phased delivery roadmap with fixed sprint milestones before any development begins.

Design & Development

We design UI/UX in Figma following platform conventions — Apple Human Interface Guidelines for iOS, Material Design 3 for Android. High-fidelity prototypes are validated with stakeholders before widget or component development begins.
Development runs in two-week agile sprints. Each sprint delivers testable builds distributed via TestFlight and Firebase App Distribution. The frontend, backend, and API layer are built in parallel so integration issues are caught during the build — not during QA.

Testing & Quality Assurance

We run a full QA cycle before any App Store submission. This covers unit testing, UI automation via Detox or XCUITest, performance profiling with Flutter DevTools or Xcode Instruments, accessibility compliance checks, and App Store and Google Play pre-submission review validation.
Nothing proceeds to submission until all priority issues are resolved and client sign-off is confirmed.

Deployment & Ongoing Support

We manage the full App Store and Google Play submission process pp signing, build configuration, store listing preparation, and release management via Fastlane CI/CD.
Post-launch we provide crash monitoring, framework version upgrade management, security patch handling, and sprint-based feature development. Your app continues to improve after launch; it does not require a rebuild every time a new iOS or Android OS version is released.

Technical Capabilities We Bring to Every Mobile App Build

Technical Capabilities We Bring to Every Mobile
App Build

Whether your product needs AI features, real-time backend systems, or cross-platform mobile delivery, the capabilities below are what our engineering team covers across every build.

What Mobile App Projects Has ETechViral Delivered Across Different Industries?

What Mobile App Projects Has ETechViral Delivered
Across Different Industries?

Every project below is a deployed mobile application built by our team covering Flutter and React Native builds, AI-integrated products, and cross-platform apps across multiple industries. Each entry documents the platform, architecture decisions made, and measurable outcomes delivered after launch.

Unlimits: AI Life Coach for Goal Achievement

Unlimits AI helps users transform their dreams into actionable plans with personalised AI coaching designed to achieve meaningful goals. If you’ve ever felt stuck, scattered, or unsure how to move forward, this app provides the structure and support you need.

DentaSmart: Transforming Dental Care With AI

DentaSmart, an AI-powered application that allows you to get real-time consultations, individualized advice, and intelligent dental examinations from the palm of your hand.

What Strong Mobile App Engineering Actually Requires And How We Deliver It.

What Strong Mobile App Engineering Actually
Requires And How We Deliver It.

Building a mobile app that performs well in the real world requires more than writing working code. It requires the right framework choice for your use case, architecture decisions that hold up as the product grows, and a deployment process that keeps the app current as iOS and Android evolve. Here is what our mobile engineering practice brings to every build.

Framework and Architecture Depth

We make framework decisions based on your specific product requirements not on what is easiest to build quickly. Flutter for consistent cross-platform performance. React Native when your team has existing JavaScript expertise. Swift for native iOS requirements where Flutter’s rendering model is not the right fit.

AI Integration as a Core Capability

We integrate AI features directly into mobile applications RAG-powered chatbots via OpenAI API and Pinecone, on-device ML inference via TensorFlow Lite and Core ML, and generative AI features via FastAPI microservices. AI capabilities are built into the product architecture not bolted on after the app is complete.

Security Built Into Every Layer

Security is an architecture decision, not a final audit. We implement OAuth 2.0 and JWT authentication, encrypted data transmission, OWASP Mobile Top 10 compliance, and platform-specific security practices Keychain Services for iOS credential storage, Android Keystore for Android. For healthcare and fintech builds, HIPAA and PCI-DSS aligned architecture is designed from the discovery phase.

Deployment and Long-Term Maintenance

We manage the full App Store and Google Play deployment pipeline and stay engaged after launch. Framework upgrades, OS compatibility updates, security patches, and new feature development continue under a structured post-launch agreement, not a separate contract with a new team.

What Clients Say After Building Their Mobile App With ETechViral

What Clients Say After Building Their Mobile App
With ETechViral

From startup founders shipping their first Flutter MVP to product teams integrating AI features into existing mobile applications, here is what clients say about the engineering quality, delivery process, and app performance after working with ETechViral.

Amir Khan and his team is very responsible and works well. We have worked together and have been able to produce a good quality application. It has been easy to manage the project and they has delivered well. I would recommend others to use his services as they provide 100% perfect services.

Yves Rumuri Founder - CallHome Calling App

Amir Khan and his team is very responsible and works well. We have worked together and have been able to produce a good quality application. It has been easy to manage the project and they has delivered well. I would recommend others to use his services as they provide 100% perfect services.

Yves Rumuri Founder - CallHome Calling App

Amir Khan and his team is very responsible and works well. We have worked together and have been able to produce a good quality application. It has been easy to manage the project and they has delivered well. I would recommend others to use his services as they provide 100% perfect services.

Yves Rumuri Founder - CallHome Calling App

Frequently Asked Questions About Mobile App Development

There isn’t one fixed price because every project is different. The cost mostly depends on what you want to build and how complex it is. You can schedule a free consultation with our team to discuss your idea, explore options, and get a clear estimate based on your goals.

Mobile app development cost depends on complexity, feature scope, backend requirements, and whether AI integration is part of the build.
A focused Flutter MVP covering core user flows, Firebase backend, and App Store and Google Play submission typically falls in the range of a defined fixed-price engagement scoped after discovery. A mid-complexity app with custom backend, authentication, payment integration, and multiple user roles runs higher. A full-featured product with AI features, WebRTC, and custom API architecture is scoped separately based on technical requirements.
We do not publish a price list because cost without scope is meaningless. Every project starts with a free discovery call and a fixed-price proposal delivered within 48 hours. You have complete cost visibility before any work begins.

Every project goes through clear stages, research, design, development, testing, and review, so nothing feels rushed or uncertain.

Quality for us starts from how we plan, not just how we code.

Yes, absolutely.

We often work with clients who already have running systems or databases. Our team can analyze your current setup and build custom integrations using APIs or other secure methods to connect new features with your existing software.

Yes, absolutely.

We often work with clients who already have running systems or databases. Our team can analyze your current setup and build custom integrations using APIs or other secure methods to connect new features with your existing software.

Yes, absolutely.

We often work with clients who already have running systems or databases. Our team can analyze your current setup and build custom integrations using APIs or other secure methods to connect new features with your existing software.

Your Mobile App Starts With One Technical Conversation.

Your Mobile App Starts With One
Technical Conversation.

No generic proposals. No offshore handoffs. Just a free 30-minute consultation with our engineering team and a clear project scope with framework recommendation, architecture approach, and delivery timeline delivered within 48 hours.

10+ mobile app engineers available now · Flutter, React Native & Swift specialists · iOS, Android & cross-platform apps shipped to production