Shikaku vs Prisma Puzzles

Master the Geometry of Logic. Step into the world of Shikaku (also known as Rectangles), a classic Japanese logic puzzle reimagined for the modern era. Shikaku is a minimalist experience designed for those who find beauty in structure and peace in problem-solving. THE GOAL Divide the grid into rectangular and square pieces such that each piece contains exactly one number. That number must represent the total area (the number of cells) of that rectangle. It’s simple to learn, but mastery requires a deep understanding of logical geometry. WHY PLAY SHIKAKU? • Handcrafted Minimalism: A clean, distraction-free interface that lets you focus entirely on the puzzle at hand. • Daily Chapters: Every day brings a new "Chapter" with three stages of escalating difficulty. Start your morning with a light challenge and end your day with a masterclass in logic. • Infinite Endless Mode: Never run out of puzzles. Generate grids of various sizes—from quick 4x4 warm-ups to daunting large-scale grids. • Personalize Your Experience: Express yourself with over 16 vibrant themes, including Tokyo Neon, Sakura, Botanical, and Midnight. • Mastery XP System: Prove your skill. Turn off assistive features to earn 1.5x XP and climb the ranks of logic masters. • Zero Distractions: No ads. No interruptions. Just you and the grid. Whether you’re a Sudoku veteran or a casual puzzle lover, Shikaku offers a meditative yet mentally stimulating escape. Handcrafted with pride by De Groot Studio.

Five puzzles. One a day. A ritual you can finish before your coffee goes cold — or wrestle with for hours if you'd like. Prisma combines five distinct daily challenges in a single calm, ad-free app. Each game flexes a different cognitive muscle, and a fresh puzzle drops every midnight — the same one for every player, so you can compare your performance with friends on Game Center. THE FIVE GAMES • Signals — Crack a four-digit code in as few guesses as possible. The classic logic puzzle, refined for daily play. • Archive — A historic photograph drops every day. Guess the year it was taken; the closer you are, the better your score. • Cargo — A grid, a pile of irregular pieces, and a tiling problem. Pack every cell to score a perfect clear. • Shift — Slide rows and columns of letters until the target words appear. Fewer moves means a better score. • Circuit — Route signals from sources to targets through logic gates. Solve at or under the par move count for a perfect mark. ARCHIVES Each of the five games ships with a 150-level local archive — handpicked, increasingly devious puzzles for when you want more than the daily. Progress is saved per level so you can quit anytime and resume later. GAME CENTER Sign in once and daily scores post automatically to your friends leaderboard. Earn first-win achievements by completing each game; track streaks and milestones with in-app badges. No accounts to create, no ads, no in-app purchases. DESIGNED FOR FOCUS Prisma is built for the iPhone you already have — clean light and dark themes, dynamic-type support, and a calm aesthetic that respects your time. Native SwiftUI, iOS 18 or later. What's in your daily ritual?