Zero Grid vs ECHO

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!

Every digit you place echoes across the board. ECHO GRID is a fresh kind of logic puzzle about reading the ripples. Place digits 1-3 on a 5x5 board. Each digit sends an echo up, down, left and right, traveling as far as its own value and adding that value to every cell it passes through. Match the target sum of every row and column to clear the stage! SIMPLE TO LEARN, DEEP TO MASTER - One rule: place digits. You'll get it in a minute - A single digit affects several rows and columns at once - plan ahead - Every puzzle has exactly one solution. Pure logic, no guessing SPECIAL CELLS CHANGE EVERYTHING - Walls block echoes - Mirrors bend them 90 degrees - Amplifiers add +1 to passing echoes The same 5x5 board feels completely different with each combination. PLENTY TO PLAY - 100 stages, stepping up from basics to walls, mirrors, amplifiers and beyond - No locks - jump straight to any stage you like - A Daily Challenge shared by players worldwide, with streaks and lifetime stats THINK AT YOUR OWN PACE - Long-press any cell to see exactly which echoes reach it and from where - Stuck? A hint corrects just one cell - Calm neon visuals and soft, soothing sound PERFECT FOR - Fans of sudoku-style and logic puzzles - Short brain workouts on your commute - Quiet, focused play before bed - works offline Available in English and Japanese. Listen to the echoes. One digit changes the whole board.