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0h h1

By Q42 B.V.

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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.

Simply tap a tile to make it red or blue and complete the grid.
0h h1 gives you unlimited puzzles for all four grid sizes:

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

0h h1 is free, without ads, without social network requirements, without locked features and without nag screens. 0h h1 is a little gift to you. We hope you enjoy it.

0h h1 can also be played on

What's New in Version 1.3.4

We're nominated for a Lovie Award!
And we've got gifts for you!

There's a present waiting for you in the size-selection screen. Fans of 0h h1 will love it :)

And there's more. You can apply visual themes to 0h h1 and make it look like our other games 0h n0 or silent-film-era Contranoid.

Plus, more achievements, leaderboards and hardcore mode by disabling the hint icon.

If you want to keep us going, treat yourself to one of our other games or support us through a (100% optional) in-app purchase.

Have fun!


iPhone Screenshot 1
iPhone Screenshot 2
iPhone Screenshot 3
iPhone Screenshot 4
iPhone Screenshot 5
iPad Screenshot 1
iPad Screenshot 2
iPad Screenshot 3
iPad Screenshot 4
iPad Screenshot 5

Customer Reviews

A simply great time.

This game is very interesting, fun, and designed so simplistically and yet is so visually appealing. Aside from a few issues it's one of the best puzzle apps I've ever played.

One issue is it doesn't always save my in progress sessions if I even put the app running in the background and only sometimes retains it. And never keeps it if I outright close the app.

The second issue is sometimes to figure out the next move, you need to compare a completed line with one that has two blank spots, but on the higher difficulties it can be an eye strain to maintain that observational stare. I suggest being able to press a button that lets you dim everything but two rows/columns and select the ones you want to focus on/light up. That's just one possibility, but any way of making it easier on my eyes would be greatly appreciated.

I also wanted to thank the devs for not putting ads in this, even though it's free. I will absolutely put some money down for this later when I am able to.

And on one final note. I wanted to say that making the hints free is really great. I struggled to understand the finer details and nuances of the game at first but after using the hints enough I quickly figured out many of the things I was doing wrong and became a much better player for it. So I am also deeply appreciative for there being no micro-transactions and thus no pressure put on me to buy them for the hints.


I was introduced to this game by a friend - she kept playing and I wanted to see what it was all about. I quickly became addicted.

My favorite puzzle game

I have never made a review for a game but this game is honestly so great. There are no ads first off , which is amazing. Everything is free. I love the concept and how simple yet difficult the game is . I reallly wish there were more levels though because the hardest level is now too easy for me due to how much i play . But all in all my favorite game ever!

0h h1
View in iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Games
  • Updated:
  • Version: 1.3.4
  • Size: 2.4 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

  1. 0h h1 Supporter$0.99