Light Up - Logic Puzzle

Light Up (also known as Akari) is a clean, elegant logic puzzle you can play anywhere — completely free and 100% offline.

The rules are simple, but the puzzles are deeply satisfying:
• Tap an empty cell to place a light bulb.
• Each bulb lights up its entire row and column until a wall blocks the light.
• Light every white cell on the board.
• No two bulbs may shine on each other.
• Numbered walls tell you exactly how many bulbs touch them.

Every puzzle is generated on your device with a guaranteed unique solution that can always be reached by pure logic — never by guessing. Whether you have one minute or twenty, there is always a fresh board waiting.

FEATURES
• Unlimited, endlessly generated puzzles
• Three difficulty levels: Easy, Medium, Hard
• Clean, distraction-free design
• Undo and Hint to help when you are stuck
• Tracks your solve time, clears, and best time
• Works fully offline — no internet, no account, no sign-up
• Free to play

Light Up is perfect for fans of logic and number puzzles like Sudoku, Nonogram, Kakuro, and other pencil-and-paper brain games. Relax, focus, and light up the board!