GreyOut vs Geodesia

Grey Out is a minimalist logic puzzle that will test your mind in the most satisfying way possible. HOW TO PLAY Each level presents a 5×5 grid of glowing cells. Tap any cell and it — along with its four neighbors — flips state. Your goal: turn every cell grey. Simple rules. Endless depth. 24 HANDCRAFTED LEVELS Progress through four chapters of increasing challenge: • Beginner — Learn the core mechanic with elegant one- and two-move solutions • Intermediate — Four- and five-tap puzzles that introduce spatial thinking • Advanced — Up to nine simultaneous effects demanding careful planning • Expert — Twelve-tap masterpieces where one wrong move unravels everything DAILY CHALLENGE A brand-new puzzle every day, seeded by the date so everyone plays the same one. Build your streak and see how far you can go. BUILT-IN HINT SYSTEM Stuck? The hint system uses an exact mathematical solver — Gaussian elimination over GF(2) — to find the next optimal move. No guessing, no randomness: provably correct guidance every time. EARN UP TO 3 STARS PER LEVEL - 3 stars: Solve at or below par - 2 stars: Within 60% above par - 1 star: Any solution POLISH THROUGHOUT • Procedurally synthesized sound — no audio files, every tap sound is computed live • Haptic feedback tuned to match the rhythm of each action • Animated wave effect ripples across affected cells on every tap • Confetti celebration when you crack a tough puzzle • Full VoiceOver support NO ACCOUNTS. NO ADS. NO TRACKING. Grey Out stores your progress locally on your device. Nothing is collected, nothing is shared.

Geodesia is a quiet, geometric puzzle game built for patient minds. On a 4×4 grid, every cell holds a value from 0 to 9. Tap to grow neighbors. Drag between adjacent cells to annihilate pairs that sum to 10, or transfer a single point. The goal is always the same: clear the board. But the path is never obvious. Across 75 hand-designed puzzles, Geodesia introduces five distinct mechanics, one chapter at a time: • Chapter I — Annihilation & Transfer: master the core grammar. • Chapter II — Walls: barriers block your drags but not your taps. • Chapter III — Arrows: one-way edges shape your route. • Chapter IV — Flip Gates: directions flip each time you cross. • Chapter V — Karma: links queue blessings and debts on every move. Every chapter has a known optimum, computed by a built-in solver. Match it to earn three stars. Use the hint button when you're stuck — it costs one star but never breaks the puzzle. Designed for: • Players who loved The Witness, Hexcells, Threes!, and Mini Metro. • Quiet moments. Geodesia respects your attention — no ads, no microtransactions, no daily login, no notifications. • Patient experimentation. Undo is free. Mistakes don't count. Features: • 75 hand-crafted puzzles across 5 mechanics • Pure local play — no account, no internet required • Optional Game Center leaderboards and achievements • Universal app — iPhone & iPad • Full Dark Mode support • Premium one-time purchase, no in-app purchases ever