LinkLines © vs Puzzle Master

AI auto-generated grid, for endless play. Route water through a living grid. Link matching color valves to build pipes, fill every cell, and never cross a line. Levels are AI auto-generated, so the challenge never runs out. Why it feels good • Satisfying path-drawing with silky animations • Crisp haptics and soft audio feedback • Instant restarts and an undo that respects your skill Why you’ll keep coming back • Infinite levels with smart difficulty ramp • “No crossing” rule creates real logic, not guesswork • Themes to match your mood • Play offline with no timers and no ads • Game Center leaderboards and achievements Core features • Auto-generated puzzles across multiple board sizes • Clean UI with readable type and large touch targets • Undo, New, and optional Solve for learning the patterns • Sound and haptics toggles • Battery-friendly rendering Accessibility • High-contrast color theme option • Haptics can be disabled • One-hand play on all devices No ads. No loot boxes. Just pure puzzle.

Five classic logic puzzles in one free app — Sudoku, KenKen, Nonogram, Slitherlink and Num Connect. No account needed, plays offline. FIVE PUZZLES, ONE GAME Sudoku — Four difficulty levels from easy to expert. Classic 9x9 number placement with notes, mistake tracking and hints. KenKen — Math meets logic. Fill the grid so every cage matches its arithmetic target. 4x4, 5x5, 6x6 and a 6x6 challenge mode. Nonogram — Also known as picross or griddler. Use the number clues to uncover a hidden picture on 5x5 and 10x10 grids. Slitherlink — Draw a single closed loop that satisfies every number. A pure deduction puzzle on 5x5, 6x6 and 7x7 boards. Num Connect — Link 1 to 2 to 3 in order while covering every cell on the board. One solution, no guessing. COMPETE A global leaderboard across all five puzzles — daily, weekly and all time. Climb six leagues from Bronze to Master. Challenge a friend to a duel: you both solve the same board and the faster time wins. PROGRESS Earn XP and level up, keep a daily streak alive, and unlock achievements as you solve. Thousands of hand-checked puzzles in every game, each with exactly one solution. FREE AND OFFLINE Every puzzle is free. Play without an internet connection. No sign-up, no account, no personal data required to start.