Gridhaiku: Daily Logic Puzzles

Five fresh logic puzzles, every day: Star Battle, Shikaku, Hashi bridges, a binary puzzle and Number Path. Gridhaiku is a calm daily puzzle habit for your brain. Each puzzle takes a few minutes, needs no words, and has exactly one solution that logic alone gets you to. No guessing.

FIVE LOGIC GAMES
• Star Battle (also called Two Not Touch): place one star in every row, column and region. Stars never touch, not even diagonally.
• Binary: fill every cell with a sun or a moon. Each row and column has as many suns as moons, and never three alike in a row.
• Rectangles (Shikaku): split the grid into rectangles. Each holds exactly one number, and the number is its area.
• Islands (Hashi, or Hashiwokakero): connect every island with bridges. The number on an island says how many bridges touch it.
• Number Path: draw one line from 1 through every cell, connecting the numbers in order. A one-line path puzzle that's easy to learn and hard to put down.

Every game starts with a short tutorial, and the rules are one tap away on every puzzle.

EASY MONDAY, EXPERT SUNDAY
The daily puzzles get a little harder each day of the week, so there's always one for your mood. On hard days, a warm-up gets you going.

HINTS THAT TEACH
Stuck? A hint doesn't just fill in a cell. It shows the next logical step and explains why it works. Learn the tricks of Star Battle, Shikaku, Hashi and binary puzzles, and you'll need fewer hints every week. Check spots a slip, and undo takes it back.

KEEP YOUR STREAK
Solve the daily puzzles to grow your streak. Missed a day? Catch up in the Archive.

UNLIMITED PUZZLES
Want more logic puzzles? Unlimited makes fresh ones on your phone, as many as you like, offline too. Pick a game, a level from Easy to Expert and a grid size. Every puzzle has a code you can share.

COMPARE AND CHALLENGE
After each daily puzzle, see how your time compares with everyone who solved it, or send a friend a link and race them on the same puzzle.

COMFORTABLE TO PLAY
• No sign-up: start solving right away. Sign in later to keep your streak on every device.
• Dark mode, a color-blind mode and screen-reader support
• Hide the timer if you prefer, and pinch to zoom on big grids
• Available in 10 languages

FREE TO PLAY
Gridhaiku is free, with ads. Remove Ads is a one-time purchase. Gridhaiku Premium removes ads and adds unlimited hints and checks, every day in the Archive, Expert and large puzzles in Unlimited, and your stats for 30 days and all time.

If you like brain games, brain teasers and puzzle games that reward clear thinking more than fast fingers, Gridhaiku gives you five daily logic puzzles to keep your mind sharp. See you tomorrow.

Help and FAQ: https://notnaapps.com/gridhaiku/faq
Privacy: https://notnaapps.com/gridhaiku/privacy-policy
Terms: https://notnaapps.com/gridhaiku/terms-conditions

Recent changes:
🛠️ Bug fixes and stability improvements