My apps

DriveCheckUA shows regional air raid alerts to drivers in Ukraine on iPhone, CarPlay, and Android, with an on-device AI summary on iPhone. Owned the product, specs and code review. On iOS, verified behavior with deterministic tests and device checks before release. Architected the iOS client, on-device AI integration, and CarPlay UI. Swift code classifies the alert status, and the model writes the summary text from the facts it is given. The AI integration checks model availability, limits generation time, handles cancellation, validates output, and falls back deterministically. Also built home-screen and secondary-region widgets, a Control Center control, App Shortcuts, a Live Activity, and a StoreKit 2 subscription flow with purchase verification and unit tests. All targets build in Swift 6 language mode with complete data-race checking. I directed AI agents through my spec-first process to build the Android app (Kotlin Multiplatform, Jetpack Compose) and a live alert backend, and reviewed their work. CI fails when an approved requirement has no test. Released on the App Store, and Android v1.0.0 as a signed APK on GitHub. A Google Play release is in preparation.

• Integrated an on-device Foundation Models summary with validation and fallback
• Added widgets, a Live Activity, and StoreKit 2 subscriptions in Swift 6 language mode

SwiftUI · Swift Concurrency · CarPlay · Core Location · MapKit · URLSession · Apple Foundation Models · LLM Integration · Structured Outputs · Swift Testing · StoreKit 2 · In-App Subscriptions · Dependency Injection · WidgetKit · Live Activities · App Intents · Actors · Sendable · Swift 6

App Store · GitHub · Android on GitHub

OneCart Family is a shopping list that a family shares through iCloud. Owned the product and its code, reviewed the implementation, and diagnosed defects. Led architecture, data synchronization, and release verification. Core Data uses private and shared CloudKit stores with CKShare invitations. Edits are saved locally first, then synced to iCloud. The app handles membership changes, duplicate records, and recovery when cloud account deletion fails. WidgetKit snapshots and App Intents support widget actions. XCTest regression suites cover cart state, sharing, persistence, synchronization errors, and deletion recovery. Released on the App Store and still being developed.

• Implemented Core Data and CloudKit persistence, CKShare invitations, and offline edits
• Added widget actions and account-lifecycle flows with regression tests

Swift · SwiftUI · Swift Concurrency · Core Data · CloudKit · CKShare · WidgetKit · App Intents · XCTest · Offline Persistence · Synchronization Recovery · Dependency Injection · UserNotifications · Actors · Sendable

App Store · GitHub