Create a kid-friendly math practice app for ages 6–9 that works well on lower-cost phones in Tier 3/4 cities. The experience should feel like a game: quick card-style quizzes for addition, subtraction, and multiplication tables, with stars or badges for correct answers and visible streaks/accuracy to keep kids motivated. It must work offline and save progress (daily streaks, accuracy, recent scores) on the device. Include a dark theme. I’d prefer Kotlin with MVVM where the ViewModel generates problems, checks answers, and updates scores; use a repository to separate data access and persist to a local SQLite store. Please target broad device coverage with min SDK 26 and target SDK 27, and set up a clean project that compiles with Gradle.