Gridhaiku: Daily Logic Puzzles

Five fresh logic puzzles, every day.

Gridhaiku is a small daily habit for your brain. Five puzzles are ready each morning: Star Battle, Binary, Rectangles, Islands and Number Path. Each 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: 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): 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, passing the numbers in order.

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

EASY MONDAY, EXPERT SUNDAY
The daily puzzles get a little harder each day of the week, so there's always one for your mood.

HINTS THAT TEACH
Stuck? A hint shows the next logical step and explains why it works. Learn the trick, not just the answer.

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

UNLIMITED PUZZLES
Pick a game, a level from Easy to Expert and a size, and get a fresh puzzle made on your iPhone, offline too. Share any puzzle by its code.

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

MADE TO BE COMFORTABLE
• No sign-up needed. Sign in with Apple later to keep your streak on every device.
• Dark mode, color-blind mode and VoiceOver support
• Hide the timer if you prefer, and pinch to zoom on big grids
• Available in 10 languages

FREE, WITH OPTIONAL UPGRADES
Gridhaiku is free to play, with ads. Remove Ads is a one-time purchase. Gridhaiku Premium is an auto-renewing subscription that removes ads and adds unlimited hints and checks, every day in the Archive, Expert and large puzzles in Unlimited, and stats for 30 days and all time.

Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. Manage or cancel it in your Apple Account settings.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://notnaapps.com/gridhaiku/privacy-policy