iOS App Development

Custom iOS App Development
Built for Success

We design and develop high-performance iOS applications for iPhone and iPad, delivering seamless user experiences, robust security, and scalable solutions tailored to your business goals.

Swift & SwiftUIReact Native & FlutterApp Store ReadyLegacy modernization
130+
iOS Apps Shipped
99.8%
Avg. Crash-Free Rate
2.1×
Avg. Retention Lift
6+ Yrs
iOS Development Experience
Our Process

How we build step by step

A structured process ensures nothing gets missed, from initial discovery to a fully optimized App Store launch.

  1. 01 Discover

    Discovery & Requirements Mapping

    User flows, feature scope, device targets, and platform requirements mapped out end-to-end before a single line of code is written.

  2. 02 Design

    UI/UX & App Architecture

    Screen flows, component structure, local/remote data layers, and a Human Interface Guidelines-aligned design system decided up front, so the app feels native and is easy to extend.

  3. 03 Build

    App Development & QA

    Secure, maintainable iOS apps built with modern frameworks, tested across devices, iOS versions, and screen sizes before it ever reaches TestFlight.

  4. 04 Launch

    Launch & Optimization

    App performance audits, crash-free rate checks, analytics setup, and App Store submission. Plus 30-day post-launch support for refinements.

What's Included

Every iOS development service we offer

Consumer apps, cross-platform builds, e-commerce apps, or API integrations, we cover the entire app end-to-end, not just the parts that are easy to template.

Custom iOS App Development

End-to-end iOS applications with a modern UI, backend services, authentication, and complex business logic, built for consumer apps, dashboards, and internal tools.

  • Swift
  • SwiftUI
  • End-to-End Ownership

iOS UI/UX Design & Prototyping

Native-feel interfaces built to Apple's Human Interface Guidelines, with interactive prototypes validated with real users before development begins.

  • Human Interface Guidelines
  • Figma Prototypes
  • User Testing

Cross-Platform & React Native Apps

Shared-codebase apps built with React Native or Flutter that still feel fully native on iOS, cutting development time without cutting quality.

  • React Native
  • Flutter
  • Shared Codebase

iOS E-Commerce & Marketplace Apps

Shopping apps with product catalogs, cart, Apple Pay, and push notifications, built for smooth checkout and repeat engagement.

  • Apple Pay
  • Push Notifications
  • Catalogs

API Development & Third-Party Integrations

RESTful and GraphQL APIs connecting your app to payment gateways, CRMs, and internal systems, built and documented alongside the app itself.

  • REST APIs
  • GraphQL
  • Integrations

Legacy App Modernization

Migrating outdated iOS apps to modern architecture and current iOS support, incrementally or as a full rebuild, without disrupting the users who depend on it.

  • Migration
  • Modernization
  • Zero Downtime

Performance & App Store Optimization

App size and launch time optimization paired with crash monitoring and memory profiling, plus App Store listing tuning, so both speed and discoverability are solved.

  • App Size Optimization
  • Crash Monitoring
  • ASO

Ongoing App Development & Support

Continuous feature development, iOS and dependency upgrades, security patching, and bug fixes, so your app keeps evolving long after v1 ships.

  • Monitoring
  • Security Patching
  • Support
What You Get

Every deliverable included

  1. Production-Ready Codebase

    Clean, documented iOS code following modern conventions, handed off through your Git provider of choice, ready for your team to extend.

  2. Fully Tested Build

    Every screen tested and refined across iPhone and iPad sizes and iOS versions, not just previewed on one simulator.

  3. App Store Ready Submission

    Signed build, listing assets, and compliance checklist prepared so your app is ready for App Store review and publishing.

  4. Performance Report

    A before-and-after performance report covering app launch time, memory usage, and crash-free rate, benchmarked with real-device testing.

  5. API Documentation

    A documented API reference so your team can extend the app or backend without guesswork.

  6. 30-Day Support Window

    Post-launch support for bug fixes, configuration tweaks, and technical questions at no extra cost.

Selected Work

iOS apps we've shipped

A cross-section of iOS work, from consumer apps to enterprise tools and e-commerce shopping apps.

Consumer Utility App

Daily Habit Tracker App

Full iOS rebuild pairing a SwiftUI interface with a lightweight backend for a habit-tracking app. Crash-free rate went from 91% to 99.8% and retention grew 2.1× in six months.

  • SwiftUI
  • Swift
  • Push Notifications
LeadPro

Field Sales Companion App

Custom-built iOS app and backend replacing a paper workflow for a sales team of 40. Cut report submission time from hours to minutes.

  • iOS
  • APIs
  • Offline Sync
E-Commerce Fashion & Lifestyle

Meridian Boutique Shopping App

Custom iOS shopping app and order backend for a DTC fashion brand. App launch time dropped from 3.9s to 0.9s and mobile revenue rose 34%.

  • Apple Pay
  • Catalogs
  • CRO
Logistics & Fleet Management

RouteWise Driver App

Real-time fleet tracking app with a live-updating UI and event-driven backend for driver check-ins. Cut dispatch response time by 45%.

  • Real-Time Data
  • APIs
  • WebSockets
Legacy Modernization

Harbor Freight Ops App Rebuild

Rebuilt a decade-old iOS app end-to-end on a modern stack with zero downtime during the transition. App launch time dropped 78%.

  • Migration
  • Swift
  • Modernization
Consumer SaaS

Roastworks Subscription App

Custom iOS subscription app with recurring billing and push-driven engagement for a coffee subscription brand. App became the top acquisition channel over web.

  • Billing
  • Push Engagement
  • Retention
Client Voices

What it's like to work with us

We measure success in crash-free rates and retention, not just how a screen looks. Here's what a few clients had to say.

Our old app took eight seconds to launch on older iPhones because nobody had looked at performance in years. The rebuild came in under two seconds, and our retention more than doubled.
Ananya Kapoor
Head of Product, WooCommerce
They handed off an iOS codebase our own engineers actually enjoyed working in, with patterns that made every new feature faster to ship.
Rohan Mehta
Founder, Meridian Boutique
Migrating our legacy app felt daunting because it touched both the UI and the backend, but the transition was seamless and crash rates dropped almost overnight.
Daniel Cruz
Operations Lead, Harbor Freight
Transparent Pricing

Simple, honest pricing

No hidden fees, no surprises. Choose a package that fits your scope or talk to us for a custom quote.

Starter

₹ 20Konwards

Perfect for simple utility apps and MVPs that need speed and a clean UI out of the gate.

  • Up to 6 screens
  • Fully responsive across iPhone & iPad
  • Human Interface Guidelines UI
  • Unlimited revisions
  • Basic backend integration
  • App Store submission included
  • 1 year free support
  • Full e-commerce build
  • Custom SaaS application
  • API integrations
Get Started

Enterprise

Custom

For large-scale apps, legacy migrations, custom platforms, or teams needing an embedded iOS development team on retainer.

  • Unlimited screens
  • Full multi-module app build
  • Legacy application migration
  • Unlimited revisions
  • API & third-party integrations
  • Advanced performance tuning
  • App Store submission included
  • 1 year free priority support
  • Dedicated development lead
  • Monthly retainer available
Talk to Us
FAQ

Common questions

Anything else on your mind? Drop us a message at info@sitefiy.com

A team that specializes in iOS avoids the platform-specific pitfalls, App Store rejections, and performance issues that come from treating iOS as an afterthought. Decisions about architecture, offline support, and device support get made by people who understand the platform deeply.

It depends on the project. A common pairing is Swift with SwiftUI for native apps, or React Native/Flutter for cross-platform needs, backed by Node.js or Laravel APIs. We'll recommend the right combination during discovery based on your goals, team, and existing systems.

A simple utility or MVP app typically takes 4–8 weeks; a complete consumer app or complex platform usually takes 10–20 weeks depending on scope. We share a detailed timeline in our proposal before development begins.

We test across a spread of iPhone and iPad models and iOS versions throughout development, not just at the end, and profile launch time, memory usage, and crash-free rate against real hardware.

Yes. We migrate legacy iOS apps to modern architecture and current iOS support, either incrementally alongside the existing app or as a full rebuild, with a plan designed to avoid disrupting existing users.

We handle the full path from build to publish, including signed build preparation, App Store listing assets, and ASO, so your app is ready for review and discoverable once it's live.

Yes. Upon receipt of final payment, full IP and the complete codebase transfer to you through your own Git repository and App Store Connect account, no vendor lock-in.

We offer optional retainers for continued feature development, iOS and dependency upgrades, security patching, and bug fixes after launch. It's entirely opt-in, not bundled by default.
Ready to Begin

Let's build an iOS app
that actually performs

Tell us about your project and we'll get back within 24 hours with a tailored iOS development proposal, no commitment required.