asoo

Services / iOS app development

iOS app development company for iPhone, iPad and Apple Watch

We build native iOS apps in Swift and SwiftUI that feel like they belong on the device: fast launches, fluid gestures, correct behaviour with Dynamic Type, dark mode, accessibility and every screen size from iPhone SE to iPad Pro.

Native is the right choice when the product depends on the platform: camera and photo pipelines, HealthKit, ARKit, Core ML on-device models, widgets, Live Activities, App Clips or Apple Watch. It is also the right choice when performance and polish are the product.

Our own iOS apps are live in the App Store, so we know Apple's review process, StoreKit subscriptions and the App Store's ranking factors from the operator side.

What is included

iOS app development, end to end

  • ■Swift and SwiftUI development for iPhone and iPad
  • ■Apple Watch, widgets, Live Activities and App Clips
  • ■Camera, photo and video pipelines with AVFoundation and Vision
  • ■HealthKit, CoreLocation, MapKit and background processing
  • ■On-device machine learning with Core ML
  • ■StoreKit 2 subscriptions, in-app purchases and paywalls
  • ■Sign in with Apple, Keychain and privacy-first data handling
  • ■Unit and UI tests, Xcode Cloud or GitHub Actions CI, Fastlane releases
  • ■App Store Connect setup, listing, screenshots and review

Who it is for

  • □Products where the iPhone is the primary platform
  • □Apps that rely on camera, health, location or on-device AI
  • □Teams that want the best possible fit with Apple's design language

Technologies

SwiftSwiftUIUIKitCombineCore DataSwiftDataCore MLStoreKit 2Xcode CloudFastlane

Process

How the work runs

  1. 01

    Discover

    We define the product, its users and the business case, audit any existing code or designs, and agree the scope, platform strategy and success metrics for the first release.

  2. 02

    Design

    User flows, wireframes and a high-fidelity prototype: clickable for apps, playable for games. We test it with real users before production starts, so the build begins from validated screens and a core loop that is already fun.

  3. 03

    Build

    Native or cross-platform, decided in Discover. Two-week sprints, a TestFlight or Play build at the end of each, automated tests and a CI pipeline from the first week.

  4. 04

    Launch and grow

    Store listing, screenshots, review submission and release. After launch we run analytics, A/B tests on onboarding and paywalls, and a roadmap for the next versions.

FAQ

iOS app development questions

Why choose native iOS over cross-platform?

Native gives direct access to every platform API on the day it ships, the best performance and the most faithful implementation of Apple's design language. If the product depends on the camera, health data, ARKit, widgets or the Watch, native is the safer and usually cheaper path over the life of the app.

Do you also build the Android version?

Yes, either as a separate native Kotlin app or, when it fits the roadmap, as a cross-platform build. Many clients launch on iOS first and follow with Android once the product is validated.

Can you take over an existing iOS codebase?

Yes. We start with an audit of the architecture, dependencies, test coverage and store compliance, then agree a plan to stabilise and extend it. UIKit to SwiftUI migrations are a common request.

How do you handle subscriptions on iOS?

With StoreKit 2, usually alongside RevenueCat for cross-platform entitlement management and analytics. We design the paywall, trial and pricing experiments as part of the product, not as an afterthought.