OneLine: Dot Connect

Welcome to OneLine: Dot Connect — the elegant Euler path brain teaser that challenges your logic and spatial reasoning. 【How to Play】 Draw a single continuous line through every dot on the grid without lifting your finger or revisiting any dot. Simple to learn, deeply satisfying to master. 【Game Features】 ■ 50 Handcrafted Puzzles Four chapters of increasing difficulty, from simple 3×3 grids to complex 8×8 challenges. Each level is a unique brain teaser designed to make you think. ■ Two Play Modes • Quick Play — jump right in with a random puzzle • Level Select — choose your challenge and track progress ■ Star Rating System Earn up to 3 stars per level based on performance. Complete all 50 puzzles with perfect ratings to prove your mastery. ■ Smart Hint System Stuck? Use hints to guide your thinking without giving away the solution. Hints highlight the next logical step. ■ Full Undo Support Made a wrong turn? Undo any move at any time. Restart puzzles freely — no penalties, no pressure. ■ Intuitive Touch Controls Smooth touch-drag controls optimized for iPhone. Draw your line naturally with a single finger. 【About Euler Path】 The Euler path problem traces back to mathematician Leonhard Euler and the famous Seven Bridges of Königsberg. Your goal: find a path through every node exactly once. A classic problem that has fascinated minds for nearly 300 years. 【Privacy Commitment】 Fully offline. No personal data collected, no ads, no in-app purchases, no internet required. Download and play immediately — no account needed. Start your OneLine journey today!