▸case-04 We are building a native iOS application using Swift 6 and SwiftUI. We need advice on structuring our app architecture using TCA (The Composable Architecture) vs MVVM with Observable, and how to configure Swift Package Manager dependencies. Please provide architectural recommendations for this pure iOS project. | pass→pass | 26,647 | 18,758 | -30% | 1 | 1 | 0% | 4,583 | 4,813 | +5% | 0 | 0 | — |
▸case-10 Our iOS and Android Flutter app experiences severe jank during dynamic route transitions and custom animations due to shader compilation. The team is considering building manual shader pre-warming scripts with Skia. What is the modern Flutter rendering engine architecture strategy to solve shader compilation jank without pre-warming scripts? | pass→pass | 19,197 | 19,862 | +3% | 1 | 1 | 0% | 3,062 | 5,154 | +68% | 0 | 0 | — |
▸case-01 I am building a multi-platform Flutter dashboard application that needs local persistence and modern Dart features. Could you design a clean architecture blueprint for this project? Please structure your response as a step-by-step breakdown covering the core data layer, recommended state management setup, directory hierarchy, and a fully typed sample repository implementation including loading and failure states. | fail→fail | 29,212 | 36,935 | +26% | 1 | 1 | 0% | 5,942 | 5,938 | -0% | 0 | 0 | — |
▸case-02 We are designing a cross-platform data visualization widget in Flutter that must adjust dynamically between phone screens and desktop windows. Please provide a complete custom painter component implementation, including smooth animation management, semantic labels for screen readers, and a golden file test snippet to verify visual rendering. | fail→pass | 37,957 | 28,373 | -25% | 1 | 1 | 0% | 8,007 | 8,226 | +3% | 0 | 0 | — |
▸case-03 I need to connect native platform APIs for background location monitoring in our Flutter project for both iOS and Android. Could you write the technical guide and code for this setup, giving me the Swift native code, Kotlin native code, Dart method channel wrapper, and unit tests using mock channel responses? | pass→pass | 30,798 | 36,759 | +19% | 1 | 1 | 0% | 7,181 | 9,693 | +35% | 0 | 0 | — |
▸case-05 We are developing a cross-platform mobile application using React Native 0.76 with the New Architecture (Fabric and TurboModules). We need to select a state management solution (Zustand vs Redux Toolkit) and handle offline persistence with WatermelonDB. Please analyze the best approach for our React Native codebase. | pass→pass | 32,805 | 17,468 | -47% | 1 | 1 | 0% | 5,824 | 4,545 | -22% | 0 | 0 | — |
▸case-06 We are building a native Android application using Kotlin 2.0 and Jetpack Compose. We need to implement a local database layer using Room DB with Coroutines Flow, and set up dependency injection using Hilt. Please outline the architecture for this Android app. | pass→pass | 21,567 | 19,869 | -8% | 1 | 1 | 0% | 4,009 | 6,065 | +51% | 0 | 0 | — |
▸case-07 We are building an enterprise Flutter application with complex domain logic, multi-step forms, and global state updates. The team is debating whether to use simple InheritedWidget with setState to avoid third-party packages, or adopt a structured compile-time safe solution. Which state management approach should we choose for compile-time safety and scalable testability, and how should it be implemented? | fail→pass | 29,292 | 23,716 | -19% | 1 | 1 | 0% | 5,531 | 6,530 | +18% | 0 | 0 | — |
▸case-08 We are modernizing our Dart networking layer in Flutter 3.x. Currently, developers pass around a state class filled with nullable fields like `bool isLoading`, `String? errorMessage`, and `T? data`. How should we refactor this API response representation using modern Dart 3 features for exhaustive type checking? | pass→pass | 15,222 | 19,902 | +31% | 1 | 1 | 0% | 2,708 | 5,522 | +104% | 0 | 0 | — |
▸case-09 We are building an offline-first Flutter mobile application that manages relational data tables with complex SQL queries and change streams. The team wants to store JSON strings in SharedPreferences to avoid adding database dependencies. What persistence framework should we use for type-safe, reactive database operations, and how do we set it up? | pass→pass | 18,580 | 18,577 | -0% | 1 | 1 | 0% | 3,491 | 5,142 | +47% | 0 | 0 | — |
▸case-11 We are building a Flutter mobile application that downloads and processes a 50MB JSON file containing 100,000 geographic points, performing heavy mathematical spatial calculations. When running this in an `async` function, the UI freezes and drops frames. How should we offload this CPU-bound computation in Flutter 3.x? | pass→pass | 19,182 | 20,051 | +5% | 1 | 1 | 0% | 3,324 | 5,244 | +58% | 0 | 0 | — |
▸case-12 We are optimizing a long scrollable list in Flutter where updating a single item causes the entire list widget tree to rebuild and drop below 60fps. The developer proposed refactoring item widgets into helper functions like `Widget _buildItemItem()` to reduce class boilerplate. How should we refactor this component to minimize widget rebuilds and preserve state identity? | pass→pass | 16,989 | 18,304 | +8% | 1 | 1 | 0% | 2,996 | 4,962 | +66% | 0 | 0 | — |
▸case-13 Our Flutter application needs to display a mixed list of 10,000 feed items interspersed with sticky header sections and dynamic grids. Currently, the team placed all items inside a Column within a SingleChildScrollView, causing the app to run out of memory. How should this scrollable layout be structured for optimal memory virtualization and performance? | pass→pass | 18,048 | 18,001 | -0% | 1 | 1 | 0% | 3,196 | 5,121 | +60% | 0 | 0 | — |
▸case-14 We are implementing a financial transactions feature in our Flutter mobile application. To protect user data against Man-in-the-Middle attacks over public networks, we need to enforce custom certificate pinning for all HTTP request traffic. How should this be implemented using the Dio package with secure handling? | pass→pass | 23,330 | 16,408 | -30% | 1 | 1 | 0% | 4,024 | 4,562 | +13% | 0 | 0 | — |
▸case-15 We need to add biometric authentication to unlock a sensitive screen in our Flutter app, while securely storing the user's session token natively. What plugins and implementation patterns should be used to achieve native biometric prompts and OS keychain storage? | pass→pass | 17,096 | 15,395 | -10% | 1 | 1 | 0% | 3,254 | 4,712 | +45% | 0 | 0 | — |
▸case-16 We are setting up continuous delivery for a multi-platform Flutter app targeted at iOS and Android. We want an automated pipeline that triggers on pull requests to run unit tests, widget tests, generate golden files, build signed artifacts for staging, and distribute them to App Store Connect and Google Play Console. How should this automated pipeline be configured? | pass→fail | 24,262 | 22,315 | -8% | 1 | 1 | 0% | 4,629 | 6,141 | +33% | 0 | 0 | — |
▸case-17 Our Flutter design system team needs an automated test suite to ensure custom button components match design specs across light and dark themes without breaking on future commits. How do we implement visual regression tests in Flutter that render widgets to static images and compare them against baseline assets? | fail→fail | 21,782 | 21,239 | -2% | 1 | 1 | 0% | 3,754 | 5,793 | +54% | 0 | 0 | — |
▸case-18 We are building a multi-platform Flutter app that runs on iOS, Android, macOS, and Web. The screen layout needs to display a single drawer navigation on mobile, a side rail on tablet, and an expanded multi-column sidebar on desktop, adjusting automatically when window boundaries resize. How should we structure this responsive layout? | pass→pass | 20,752 | 20,293 | -2% | 1 | 1 | 0% | 4,062 | 5,908 | +45% | 0 | 0 | — |
▸case-19 We are conducting an accessibility audit on a Flutter mobile app. Custom icon buttons and custom drawn chart components are skipped by VoiceOver and TalkBack screen readers, preventing visually impaired users from interacting with data. How should these custom components be updated to provide full screen reader support? | pass→pass | 15,372 | 17,487 | +14% | 1 | 1 | 0% | 2,590 | 5,068 | +96% | 0 | 0 | — |
▸case-20 We are building a Flutter fitness app that requires streaming real-time pedometer hardware sensor events continuously from native iOS and Android into Dart. Calling MethodChannel.invokeMethod repeatedly causes heavy overhead. What platform channel pattern should be used for continuous event streaming, and how is it implemented? | pass→pass | 18,280 | 19,600 | +7% | 1 | 1 | 0% | 3,530 | 5,534 | +57% | 0 | 0 | — |
▸case-21 We are deploying a production Flutter web application. Users report slow initial loading times and high bundle sizes. How should we configure the build flags, WebAssembly renderers, progressive web app manifest, and browser caching strategies to optimize Flutter web performance? | pass→pass | 22,985 | 20,387 | -11% | 1 | 1 | 0% | 4,191 | 5,575 | +33% | 0 | 0 | — |
▸case-22 We are designing a field inspection app in Flutter that operates in remote areas without internet. Field workers must create and update inspection reports offline. When connectivity is restored, local database changes must synchronize with our REST API, resolving potential server conflict timestamps. How should this offline-first architecture with local cache and conflict resolution be designed? | pass→pass | 30,715 | 31,607 | +3% | 1 | 1 | 0% | 5,273 | 7,729 | +47% | 0 | 0 | — |
▸case-23 We need to localize a Flutter app into 10 languages, supporting dynamic locale switching, pluralization rules, and right-to-left (RTL) text layouts. How should localization be set up in Flutter using standard ARB files and code generation? | fail→pass | 18,047 | 19,273 | +7% | 1 | 1 | 0% | 3,642 | 5,894 | +62% | 0 | 0 | — |
▸case-24 We need to build a custom interactive card expansion component in Flutter that animates scale, rotation, and opacity simultaneously over 600ms with a custom cubic curve when tapped. How should this animation be constructed using controllers, explicit tweens, and performance-optimized builder widgets? | pass→pass | 19,955 | 17,781 | -11% | 1 | 1 | 0% | 4,096 | 5,252 | +28% | 0 | 0 | — |
▸case-25 We have an existing high-performance C++ audio processing library that we need to execute directly inside our Flutter application without network latency or platform channel serializing overhead. How do we invoke native C/C++ functions directly from Dart using Dart FFI? | pass→pass | 20,904 | 31,226 | +49% | 1 | 1 | 0% | 3,904 | 7,824 | +100% | 0 | 0 | — |