App Review rejections on SwiftUI builds
SwiftUI-specific rendering bugs and missing PrivacyInfo.xcprivacy declarations are a top rejection cause. We pre-screen at design stage and handle review team correspondence.
SwiftUI iOS 16+ App Store WCAG
SwiftUI Development Services for Declarative, Accessible iOS Apps
Seventeen shipped SwiftUI screens in production — JoyJet's social feed, LiMP's VPN dashboard, Signatory Pro's biometric e-signature flow. Declarative layouts, live previews, Dynamic Type and VoiceOver-first from day one. iOS 16+ target, UIKit interop where needed, App Store submission in every engagement.
We build SwiftUI interfaces for consumer apps, FinTech dashboards and HealthKit-integrated clinical tools — declarative layouts that adapt to every device size, accessibility need and Dynamic Type scale. When an existing UIKit codebase needs a modern surface, we migrate incrementally using UIViewRepresentable without breaking the surrounding architecture. Every SwiftUI project leaves Apple's privacy manifest updated and App Review-ready.
Challenges
Industry challenges we solve
UIKit interop breakage
Mixing UIViewRepresentable with SwiftUI view-tree causes layout glitches and lifecycle conflicts. We establish explicit boundaries and test on physical devices at each integration point.
Dynamic Type and accessibility regressions
Custom layouts break at accessibility text sizes. We design with accessibilityElement modifiers and test at all fourteen Dynamic Type scales before release.
State management at scale
@State, @ObservedObject and environment leaks create memory and update-loop bugs in complex screens. We enforce a unidirectional data-flow architecture and audit the view hierarchy.
Animation jank on older devices
Complex SwiftUI animations stutter below A14. We profile with Instruments on target hardware and fall back to UIKit animation where SwiftUI cannot hit 60 fps.
Privacy manifest compliance
Xcode 15+ requires PrivacyInfo.xcprivacy for all API usage. We audit every third-party SDK and map API calls to approved reasons before each submission.
Solutions
Solutions we build
Consumer iOS apps
Social platforms, streaming apps and productivity tools — SwiftUI-native, push notifications, iCloud sync, StoreKit 2 subscriptions.
FinTech dashboards
Biometric auth with LocalAuthentication, Secure Enclave key storage, PCI DSS-aware card display and Open Banking integrations.
HealthKit apps
HIPAA-capable health data ingestion, HealthKit read/write, clinical workflow UIs with Dynamic Type and VoiceOver support.
UIKit-to-SwiftUI migration
Incremental rewrites using UIViewRepresentable — move screen by screen without disrupting live users or breaking CI.
Enterprise iOS tools
MDM-distributed apps with Managed App Config, SSO via ASWebAuthenticationSession, offline-first CoreData architecture.
Accessibility-first builds
AA/AAA WCAG 2.2 compliance from the ground up — every screen tested with VoiceOver, Dynamic Type and colour-contrast tools.
Stack
Technology stack
SwiftUI, UIKit, Combine, async/await, Swift Concurrency, StoreKit 2, HealthKit, CoreData, LocalAuthentication, Keychain, XCTest, Fastlane, TestFlight.
Compliance
Compliance & regulations
GDPR-aligned · HIPAA-capable · WCAG 2.2 · CCPA-acknowledged
EU
- GDPR — App Tracking Transparency, data subject rights.
- eIDAS — identity verification flows.
- EAA — accessibility compliance for EU market apps.
- DSA — transparency requirements for digital services.
US
- HIPAA — HealthKit data handling, clinical data flows.
- CCPA/CPRA — ATT + consent and opt-out flows.
- COPPA — age-gating and children's privacy.
- Section 508 / WCAG 2.2 — VoiceOver, Dynamic Type.
Cases
Selected SwiftUI iOS case studies
Social Media · Consumer Tech
JoyJet
Production social platform — App Store + Google Play, live across the US and EU — with geo Radar, encrypted messaging and a virtual economy.
Consumer Privacy · Mobile
LiMP
Consumer WireGuard VPN app for iOS and Android with zero-log architecture, launched across the US and EU.
LegalTech · Mobile · CRM
Signatory Pro
Native iOS and Android e-signature clients with a Symfony + React CRM for a cross-border law firm — KYC onboarding and a defensible evidence trail for US & EU matters.
Why YuSMP
Why iOS teams choose YuSMP for SwiftUI
Production SwiftUI in complex domains
We have shipped SwiftUI screens in VPN, FinTech and HealthKit apps — not just portfolio projects. We know which API gaps still require UIKit and how to bridge them cleanly.
Accessibility-first process
Dynamic Type, VoiceOver and colour-contrast audits happen at every sprint — not as a final checklist. EU EAA compliance is a standard deliverable.
App Store submission experience
Rejection correspondence, PrivacyInfo.xcprivacy audits and phased rollout management are part of every iOS engagement at YuSMP.
FAQ
SwiftUI FAQ
When do you choose SwiftUI over UIKit?
SwiftUI for all new screens targeting iOS 16+ — declarative layouts, live previews and significantly less boilerplate. UIKit where we need fine-grained animation control, legacy codebase integration, or when a framework component is not yet exposed cleanly in SwiftUI. Most production apps mix both.
Can you migrate an existing UIKit app to SwiftUI?
Yes — incrementally. We introduce SwiftUI screens via UIHostingController without touching the surrounding UIKit architecture. Each screen is migrated, tested and released before moving to the next, so users never see a broken state.
How do you handle Dynamic Type and accessibility?
We design with accessibilityElement modifiers and test at all fourteen Dynamic Type scales on physical devices. VoiceOver traversal is validated at each PR, not as a release-gate checklist.
Do you implement in-app purchases with StoreKit 2?
Yes — consumable, non-consumable and auto-renewable subscriptions using StoreKit 2's async/await API, server-side App Store Server API validation and renewal/refund webhook handling.
What is your approach to state management?
Unidirectional data flow with @Observable (iOS 17) or ObservableObject for broader iOS 16 support. We avoid nested @State across screen boundaries and audit the view hierarchy for retain cycles.
Do you handle App Store submission and TestFlight?
Yes. Provisioning profiles, entitlements, TestFlight beta groups, review submissions and rejection responses are part of every iOS engagement — not an optional extra.
How do you ensure GDPR compliance for EU App Store users?
App Tracking Transparency prompt, data subject rights flows, PrivacyInfo.xcprivacy declarations for all SDK API usage and EU data residency configuration for backend services.
Ship a declarative iOS app with senior SwiftUI engineers
Response within 1 business day. NDA on request.