GridSum vs Gridsum

Train your mind with GridSum, the satisfying number puzzle game that's easy to learn and hard to master. How it works: Select cells in a 7x7 grid so that each row and column adds up to its target number. Every puzzle has exactly one solution, solvable by pure logic. What's inside: - Daily Puzzle: a fresh challenge every day - Puzzle Packs: hundreds of puzzles across 20 hand-crafted packs - Three difficulty levels: Easy for a quick fix, Medium to sharpen your focus, Hard to truly test your logic - Hints: stuck? Reveal a cell to get back on track - Personal bests: beat your time and set new records - Coin rewards: earn coins for every puzzle you solve Why you'll love it: GridSum hits the sweet spot between a quick brain teaser and a deep mental workout. Challenging enough to keep you engaged, rewarding enough to keep you coming back. Perfect for a morning commute, a coffee break, or winding down at night. Download free and start solving today.

Every region has a target sum. Swap tiles until every region matches at once. That is Gridsum — a number puzzle built on pure logic. No timer. No lives. No luck. The board is fully knowable and every solution is reachable through arithmetic and planning alone. HOW IT WORKS The grid is divided into colored regions. Each region contains numbered tiles and a target sum. Swap any two tiles and watch the totals shift in real time. Find the arrangement where every region simultaneously hits its target — puzzle solved. Gridsum starts with a simple 2×2 grid and two regions. As difficulty climbs, the challenge deepens: 3×3 and 4×4 grids, irregular region shapes, and tiles that belong to two regions at once — where a single swap changes two totals simultaneously. Every puzzle is solvable through logic. No guessing required. HUNDREDS OF HANDCRAFTED LEVELS Work through the difficulty tiers: Tutorial, Beginner, Apprentice, Intermediate, Advanced, Expert, Veteran, and Pro, Master, and Grandmaster. Each level is rated by move count. Solve within the target — no hints, no resets — to earn a PERFECT badge alongside your stars. Every level tracks your personal best time and move count. See exactly how much you've improved. DAILY CHALLENGE A new arithmetic puzzle drops every day, seeded by the date. Your streak counts any day you play at least one level — the daily challenge or any regular level. Your current streak and best streak are always visible on the home screen. GLOBAL LEADERBOARD Compete with players worldwide across four ranked categories: total stars earned, solving speed, perfect solves, and highest level reached. Set a display name and see exactly where you stand. BUILT FOR FOCUS Dark background. Glowing neon region borders. Clean geometric typography. Gridsum is designed for players who want a clean, distraction-free logic puzzle — no characters, no story, no countdown pressure. Just numbers and logic. Accessibility options: colorblind mode with pattern fills on region borders, reduce motion, and large text. Free to play with ads. A one-time purchase permanently removes all ads — no subscription, no recurring charge. If you enjoy sudoku, KenKen, Wordle, or number puzzles generally, Gridsum gives you something more spatial and strategic to work through. Download for free and start your first streak today.