Sudoku Ultimato: Classic, Killer, and Big Boards in One App

I built Sudoku Ultimato after getting frustrated by intrusive ads and subscriptions in other Sudoku apps. It supports Classic + Killer modes, tiny and giant boards, daily puzzles, accessibility options, and a clean, calm UI. Free on iOS, Android soon.

Sudoku Ultimato is built with Flutter using a shared codebase for iOS and Android. Puzzle stats, leaderboards, and daily puzzles run on Firebase with Firestore, Cloud Functions, and Auth. I also use Remote Config for feature flags and App Check for protection. Android is currently in closed beta and iOS is live on the App Store.

Download for free in the App Store https://apps.apple.com/us/app/sudoku-ultimato/id6755356402