Operatum vs Sumify

Operatum is two games in one: classic math challenges and a full Sudoku suite. Train your brain in short sessions, or sink into an expert grid for an hour. SUDOKU — TWO MODES • Classic Sudoku — the 9x9 grid you already know • Sum Sudoku — every region has to add up • Six difficulties: Easy, Medium, Hard, Expert, Insane and InHuman • Notes, advanced notes, undo, erase and hints CLASSIC MATH MODE • Find the numbers that make the equation work • Addition, subtraction, multiplication and division • Ranked levels that unlock as you improve • Beat the timer without running out of lives WHY PLAYERS STAY • Play offline — no connection needed • Short rounds that fit a coffee break • Difficulty that grows with you, from first grader to speed solver • Clean, distraction-free design • Free to play Good for kids learning arithmetic, students keeping mental math sharp, and adults who want a daily brain workout that is not another word game. Download Operatum and see how far your numbers take you.

Sumify is a relaxing yet addictive number puzzle. Fill the grid so that every row and column adds up to its target sum, and use each number only once. Easy to learn, hard to put down. HOW TO PLAY • Check the target sums beside each row and above each column • Pick a number from the panel and place it in a cell • Use every number exactly once • Tap Check Solution when the grid is full THREE DIFFICULTIES • Easy 3x3: perfect for a quick break • Medium 4x4: a real logic challenge • Hard 5x5: starts with a few locked cells to give you a foothold FEATURES • Daily puzzle: the same grid for everyone, a new one every day • Undo any move and pause whenever you like • Live feedback: a sum turns green the moment it matches • Statistics and achievements to follow your progress • Timer and scoring: solve faster and use fewer hints for a higher score • Stuck? Watch a short video to reveal a cell • Leave a game and pick it up later • English and Turkish, switchable inside the app • Sound and haptics you can turn off Sumify is a calm daily workout for your head. Play for a few minutes to sharpen your mental arithmetic, or settle in for a 5x5 that takes real planning. Download Sumify and train your brain with numbers.