Dominoes meet logic puzzles. No guessing, just pure deduction. dotio is a thoughtful puzzle game where every solution is earned through careful reasoning. If you love daily domino puzzles and want more than one a day, dotio gives you 4,800+, with three daily challenges and an unlimited vault. SIMPLE TO LEARN Place dominoes on the grid so every rule is satisfied. Match sums, find equals, and spot differences. The rules guide you towards the one valid solution. CHALLENGING TO MASTER Start with a handful of dominoes and simple rules, then progress to devious puzzles with layered constraints and deeper logic. Every puzzle is designed to feel fair, logical, and genuinely rewarding to solve. COMPETE DAILY Tackle three daily puzzles (Easy, Medium, and Hard), then see where you stand on the live leaderboard. Track your percentile, watch your rank update in real time, and compare your times with players around the world. When the day locks, your placement is final. PLAY WITH FRIENDS Create a group, share your code, and compete directly with the people you know. See live standings, final placements, and who conquered the day. Pick your own nickname so friends know exactly who's topping the board. FEATURES • Over 4,800 carefully crafted puzzles, each with exactly one solution • Daily challenges in Easy, Medium, and Hard with live leaderboard and rankings • Friends groups: create or join a group and compete with people you know • Expert Mode: unlock the hardest puzzles by mastering Hard • Ghost Mode: race against time as rules fade away • Smart hints that guide without spoiling the answer • Light & Dark themes: choose the look that suits you • 45+ achievements to unlock including badges, milestones, and more • Track your stats, streaks, and personal bests • A gentle, interactive tutorial that teaches as you play • Share results as image cards or copyable text • Pay once, play forever. A DAILY RITUAL Whether you play one puzzle a day or settle in for a longer session, dotio is designed to be enjoyed at your own pace. One puzzle. One solution. Pure, satisfying logic.