Zero Grid vs Arrow Loop

A simple math puzzle that anyone can pick up and play. Easy to start, hard to put down. Use the number in the center to calculate each tile and turn all numbers into “0”. Start with simple puzzles using subtraction. As you progress, addition, multiplication, and division are introduced, making the puzzles deeper and more strategic. Drag across tiles to connect and select them in one stroke. Choosing the right steps and operations is the key to solving each puzzle. Clear stages from Level 1 to 200 in order. After clearing Level 40, the “Puzzle Generator” is unlocked, allowing you to create and play unlimited custom puzzles. Features • Simple and intuitive controls • Operations increase with difficulty (− → + → × → ÷) • Satisfying one-stroke drag gameplay • Strategic, brain-teasing puzzles • 200 challenging stages • Unlock the puzzle generator • Perfect for short play sessions Play now and experience the fun of puzzles!

Sharpen your logic in quiet focus. One loop. A few shaded cells. That's the whole rule — and the longer you look at the board, the clearer your mind becomes. Use the arrow-and-number clues to shade exactly as many cells as each arrow points to, then draw a single closed loop through every remaining cell. Shaded cells never touch side by side, and clue cells are never shaded or crossed by the loop. WHAT YOU GET - A pencil logic puzzle in the Yajilin style: draw the loop, shade the cells - Every board has exactly one answer - Hand-picked boards you can solve by reasoning alone. No guessing required - Four levels from Easy (6x6) to Expert (12x12), graded by the depth of reasoning - Today's puzzle: one board for everyone, set by the date - Drag to draw the loop, tap to shade a cell - Leave a puzzle and continue right where you stopped - Ranks and titles that grow as you solve - Gentle help when you're stuck: mistake highlighting and hints - Six board themes: Indigo, Ink, Vermilion, Pine, Sakura and Night - Fully offline. No sign-up - English and Japanese, in a calm paper-and-ink style MADE FOR YOU IF - You want to turn a few spare minutes into quiet, focused thinking - You enjoy Slitherlink, Nurikabe, Sudoku or nonograms - You're tired of ambiguous puzzles and ad-heavy apps - You love the satisfying click of a single, certain answer - You'd like a small bedtime ritual with nothing chasing you PEACE OF MIND - Free to start. No subscriptions - No third-party ads - Your records stay on your device (no account needed) - The app shows small cards introducing other apps by the developer (TORANKIRITE). To build them, the app reads public App Store information; nothing about you is sent