Native iOS App Development in Swift and SwiftUI
We plan, design and build native iPhone apps in Swift and SwiftUI, then take them through TestFlight and App Store review. You get a fixed scope, timeline and price before any code is written.
iOS App Development
Most app projects that go wrong do so before the first line of code. The idea is clear in the owner's head, but nobody has written down which screens exist, what data each one needs, where that data lives, or what Apple will expect at review time. The result is a build that keeps growing, a budget that keeps moving and an app that gets rejected for something that could have been planned for.
We start with a short discovery phase: user flows, wireframes and a written feature list, so you can see the app before it is built. Then we build natively in Swift with SwiftUI for the interface, dropping into UIKit where a component or library still needs it. We plan for the App Store Review Guidelines from day one, including privacy manifests, App Tracking Transparency prompts, Sign in with Apple when you offer other social logins, and StoreKit for in-app purchases and subscriptions.
ISOL Systems has built websites and digital products since 2010, and our founder, Muhammad Moin Razzaq, leads every project directly. That web, API and AI background matters for apps: most iPhone apps are only as good as the backend behind them, and we can build the app and the systems it talks to, or connect it cleanly to the website and store you already run.
What You Get
Discovery and wireframes
We map user flows, list every screen and write a feature spec with you. Clickable wireframes let you test the idea and catch gaps before design and development begin.
Native Swift and SwiftUI build
The app is written in Swift with SwiftUI for the interface and UIKit only where it is still the better tool. Code is structured so features can be added later without a rewrite.
Sign-in and accounts
Email, passkey or social sign-in, with Sign in with Apple where Apple's guidelines expect it. Accounts can be shared with your existing website or a new backend we build.
In-app purchases with StoreKit
Consumable and non-consumable purchases and auto-renewing subscriptions configured in App Store Connect, with server-side receipt checks and restore purchases handled properly.
Privacy and review readiness
Privacy manifests for the app and its SDKs, App Tracking Transparency prompts only where you actually track, accurate privacy labels and an account deletion path if users can sign up.
TestFlight betas
You and your testers install real builds through TestFlight throughout the project, so feedback happens on a phone in your hand rather than in screenshots.
Our Process
Brief and estimate
You send a short brief. We ask the questions that affect cost, then return a fixed-price estimate with scope, milestones and timeline.
Discovery and design
We produce user flows, wireframes and the interface design, and agree the feature list in writing before development starts.
Build in milestones
We build feature by feature and ship TestFlight builds at each milestone, so you can review progress and request changes early.
Submission and handover
We prepare the App Store listing, submit for review, handle any questions from Apple and hand over the code, accounts and documentation.
Deliverables
- Written feature spec, user flows and clickable wireframes
- Native iPhone app source code in Swift and SwiftUI, in a repository you own
- TestFlight builds at each milestone for you and your testers
- App Store Connect setup, including in-app products, privacy labels and review notes
- App Store submission handled through to a review decision
- Handover document covering build steps, third-party services and next steps
Tools & Platforms
We pick tools for your project, not the other way round. If you already use a platform, we work inside it.
iOS App Development: Questions Answered
What drives the cost of an iOS app?
Mainly the number of screens and how much happens behind them. A content or booking app with a simple backend costs far less than one with real-time chat, payments, offline sync or integrations with several outside systems. Subscriptions, custom animations and an admin panel also add time. We price from your brief and fix the price before work starts, so scope changes are discussed openly rather than discovered on an invoice.
How long does it take to build and launch?
A focused first version with a clear feature list usually takes a few months from discovery to App Store submission, and larger apps take longer. Apple's review typically adds a short wait at the end. We give you a milestone timeline with the estimate, and the biggest factor we cannot control is how quickly feedback and content come back from your side.
Who owns the code and the Apple Developer account?
You do. We recommend you enroll in the Apple Developer Program under your own name or company, then add us as a team member. The app is published under your account and the source code lives in a repository you control. If you ever move to another developer, nothing has to be transferred out of our hands.
Should I build native iOS or go cross-platform?
Native Swift is the right choice when the app leans on Apple features, needs top performance or will be iPhone-only for a while. If you need iOS and Android at the same time on one budget, React Native or Flutter is often the better fit. We will tell you which we recommend for your case and why, including the trade-offs.
Often Paired With
App Store Submission & ASO
Listings, screenshots, keywords and review handling so your app gets approved and found.
Explore App Store Submission & ASOMobile App Backend & APIs
Secure backends, databases, push notifications and admin panels that power your app.
Explore Mobile App Backend & APIsiOS App Maintenance & Updates
iOS version upgrades, bug fixes, new features and crash monitoring on a monthly plan.
Explore iOS App Maintenance & UpdatesLet's Talk About iOS App Development
Send a short brief and get a fixed scope, timeline and price, plus an honest view of what is worth doing first.
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