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

I like that there are daily challenges, and I can finish those and get my dopamine hit for the day, without endless playing/time wasting. There's also the option for free play if I want to play more than what the daily challenges offer, but that's pretty rare. Also - NO ADS! It's enjoyable enough that I've already donated a few times, and I'm happy to support this app

I enjoyed spending lots of time on this little app, in between other things. I got quite good at doing the smaller puzzles without any thought. The app recently updated, and appears to no longer generate a new level puzzle upon start; there are now only five puzzles, one per level, I assume per day. I don't appreciate the removal of function, but I appreciate the sign to move on. Thank you for the hours of enjoyment.

This is an excellent puzzle game. The controls and interface are well designed. It is simple yet challenging and the different board sizes mean you can fit in a 4x4 or 6x6 game while you are waiting for the microwave or something, or you can sit down and play a full 12x12 game. There aren't any ads or obnoxious microtransactions and the only form of monetization is optional which is really cool; most apps don't do this. There need to be more apps like this on the play store. HIGHLY RECOMMEND!

What's new

We've added support to sync your score and games played with Google Play Game Services. This means you can now take your progress with you from your old device to your new one!

Also, there's a new setting called Fast Intro, which makes the game start faster so you can get to your puzzle as quickly as possible :)

Finally, to support Ukraine, we've added a matching color theme. It will get enabled by default, but you can revert back to the original 0h h1 theme from the settings screen.