0h h1

Q42

In-app purchases

About this game

0h h1 is a little logic game that follows three simple rules:

- Three red tiles or three blue tiles next to each other in a row or column isn't allowed
- A full row or column must have as many blue tiles as it has red ones.
- No two rows are the same. No two columns either.

It's up to you to complete the grid without ever having to guess. Simply tap a tile to make it blue or red and complete the grid.

0h h1 is 100% free, without ads or locked content and gives you unlimited puzzles in these grid sizes:

4 x 4
6 x 6
8 x 8
10 x 10
12 x 12

Each puzzle can be played in perfect Zen mode without any pressure. But you can attempt to beat your personal best time in the game's time trials, unlock fun achievements and compete with friends in leaderboards.

0h h1 is akin to Binary Sudoku, also known as Takuzu, Binairo or Binaire.
0h h1 is a little gift to you. I hope you enjoy it.
0h h1 can also be played on 0hh1.com.

And don't forget to check out its sibling game 0h n0! 0hn0.com

Ratings and reviews

Amazing game! As someone who is visually limited, it would be amazing to have a feature that allows you to compare two rows in isolation. Maybe like a dimming effect for all other rows. That and the ability to save would be great since my phone kills this app even when I ask it not to.

0h h1 has no ads, which is an instant plus. But that's not the only thing that's kept me playing for 1937 rounds. The premise is simple but elegant, and I use it all the time when I wait for my meetings to start. I have a Flip 4 with a narrow screen, plus some minor eyesight and dexterity problems. While I can do the larger puzzles, I mostly play 8x8. It's a shame that this dev's other games aren't compatible with my device. I would love to see more of their work.

I really love this game, and it's sister app 0h n0! I've been playing the daily puzzles every day for the past couple of months. It's a great way to start the day. My only critique is that I wish the timer for the puzzles would stop when I click to another app. There's been a couple of times where I was told it took me an hour to do a puzzle when it really only took a few minutes, with a significant break in between. Otherwise, absolutely love!