Deduce Daily: Logic Puzzles

Handcrafted logic puzzles in one app, and one shared challenge every day.

Deduce Daily is a collection for people who like the quiet kind of puzzle — the sort you solve by noticing something, not by guessing. Every board is generated on your device, so there is nothing to download and nothing to wait for, and the whole app works with no connection at all.

TODAY'S PUZZLE
One hard puzzle a day, drawn from the logic games, and the same board for everyone playing anywhere in the world. It changes at midnight UTC. There are no hints on the daily — it is not the same challenge if some players get help — and there is no way to re-deal it, so a streak means you turned up and finished.

THE GAMES
• Nonogram — reveal a hidden picture, one certain square at a time
• Kakuro — fit unique digits into crossing sums
• Killer Sudoku — a number grid guided by cage totals
• Futoshiki — balance a Latin square with greater-than clues
• Slitherlink — draw one unbroken loop around a field of clues
• Logic Grid — cross-reference clues until every match is certain
• Binairo — two symbols, three rules, no guessing
• Suguru — fill each block, and never let equal numbers touch
• Light Up — light every square without a bulb shining on another
• Bridges — join every island into one connected map
• Net — turn every piece until the whole network joins up
• Threads — join each pair of dots without letting a thread cross
• One Line — trace every line exactly once, without lifting your finger
• Grand Tour — visit every square exactly once, start to finish
• Map Color — color every region so no two neighbors are alike
• Memory Match — turn, remember, and collect every illustrated pair
• Sliding Puzzle — restore the board by moving the empty space
• Maze — find a path through a fresh, perfect maze
• Ice Maze — slide until something stops you; stopping is the puzzle

BUILT TO BE PLAYED
Three difficulties on every game, tuned by measuring how much work each one actually takes rather than by guessing. Hints that reveal the next real move instead of skipping the puzzle for you. A check that tells you where you have gone wrong, not merely that you have.

MADE WITH CARE
Original illustrations for every game. No account, no sign-up, no timers pushing you along. Color is never the only way a board tells you something, so the games stay readable if you do not see color the way most people do.

Your progress stays on your device.

Logic puzzles included: nonogram, hanjie, japanese crossword, kakuro, cross sums, killer sudoku, futoshiki, slitherlink, loop the loop, logic grid, binairo, suguru, light up, akari, bridges, hashi, hashiwokakero, net, netwalk, threads, one line, grand tour, map color, memory match, sliding puzzle, maze, ice maze. Every one of them is an offline brain game, and the daily puzzle is the same board for everybody.