Calcudoku vs LineaLogic

If you love Sudoku but are looking for a deeper challenge, or if you simply enjoy games that give your brain a real workout, Calcudoku is the ultimate logic puzzle. It combines the grid-filling deduction of Sudoku with simple arithmetic, creating a deeply satisfying balance of mental math, strategy, and problem-solving. Whether you want to sharpen your focus, keep your mind agile during a quick break, or master complex logical deduction, Calcudoku offers endless replayability for beginners and puzzle veterans alike. --- WHAT IS CALCUDOKU? --- Also known as Mathdoku or KenKen®, Calcudoku challenges you to solve a grid using logic and arithmetic: • Grid: Fill an N x N grid so that every row and column contains the numbers 1 through N exactly once without repeating. You choose the grid size to solve, anywhere from a 3x3 to a 9x9. • Cages: Outlined groups of cells (cages) each display a target number and an arithmetic operator. • Math: The numbers in each cage must combine using its operator (+, −, ×, ÷) to hit the target. Numbers can repeat within a cage as long as they stay in different rows and columns. It’s the ultimate combination of mental math, pattern recognition, and pure deduction. --- THE SMART DIFFERENTIATOR --- Many puzzle apps ruin the fun when you get stuck by simply filling in a random cell for you when requesting help. Our app takes a different approach: it teaches you how to solve it. If you hit a wall, our built-in helper analyzes your exact grid state and explains the logical next step. The engine guides you through genuine deduction strategies—showing you how to cross-reference overlapping cages, prune cell candidates, and leverage your notes so you can solve the grid completely on your own. --- KEY GAME FEATURES --- • Intelligent Explanations: Step-by-step guidance focused on note-taking, elimination strategies, and candidate pruning rather than giving away answers. • Optional Auto-Notes: The settings tab provides the option to jump into a puzzle with the initial candidate notes based on cage arithmetic. Skip the mundane and get right to the logic! • Smooth Input: Rapidly input answers and edit candidate notes with an intuitive, fluid UI built for mobile screens. • Complete Arithmetic Variety: Play grids featuring addition, subtraction, multiplication, and division. • All Skill Levels: Progress from quick 3x3 warmups to grueling 9x9 logic grids. • Polished Interface: Full native dark mode support, crisp typography, and seamless offline play - no Wi-Fi required. Master the grid, elevate your deduction skills, and train your brain with a game that actually makes you a better solver.

A real logic game. Not another app stuffed with ads. Not a subscription that costs you more every month. Just an elegant puzzle where every challenge is solved by reasoning. That's LineaLogic. ■ THE CONCEPT Every puzzle gives you a clue. Your job: pick the right sticks — each one has a color and a size — to satisfy every constraint at the same time. The twist? Constraints overlap. A large red stick counts as both "1 large" AND "1 red". Read carefully, reason it out, choose right. Easy to learn. Demanding to master. ■ WHAT YOU GET → 7 progressive difficulty levels, 70+ deduction puzzles. → Level 1 is completely free — try before you buy. → Zero ads. Ever. Anywhere. → Zero subscriptions. One single lifetime purchase unlocks everything. → No timer, no lives, no game over. Take your time to think. ■ WHY LINEALOGIC IS DIFFERENT Most logic games drown you in ads or charge you every month. LineaLogic respects your time and your money: • Clean, premium design — crisp typography, bold colors, zero distractions. Pure thinking. • A unique mechanic — reading clues and overlapping constraints, not a simple "count the objects". • Clear feedback — a wrong answer tells you why, and you fix it. You learn as you play. • Works offline — on the subway, on a plane, anywhere. • No account required — play immediately. ■ WHO IS THIS FOR? • You love Sudoku and deduction riddles • You want a calm game to give your brain a workout • You want a smart puzzle to share with the family (ages 6+) • You appreciate premium apps with no ads and no subscriptions ■ THE LINEALOGIC FAMILY LineaLogic is the sister app of KubiLogic: same standards, same polished design, same promise — no ads, no subscriptions, one lifetime purchase. If you loved one, you'll love the other. ■ THE MATH IS SIMPLE Dozens of puzzles, hours of thinking, a single payment. Compare that to any $9.99/month subscription. Download LineaLogic. Start with the free level. And when you're hooked, unlock everything. Your brain deserves better than an ad every 30 seconds.