Free
In-App Purchases

Details

  • Released
  • Updated
  • February 12, 2015
  • October 21, 2017

Features

0h n0 screenshot #1 for iPhone
0h n0 screenshot #2 for iPhone
0h n0 screenshot #3 for iPhone
0h n0 screenshot #4 for iPhone
0h n0 screenshot #5 for iPhone
iphone
ipad
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About

A challenging logic puzzle game where you complete grids by strategically placing blue and red dots. Follow simple rules about visibility and counts to solve unlimited puzzles without guessing. Enjoy Zen mode, time trials, achievements, and leaderboards.

Logic-based grid puzzles
Blue and red dot placement
Unlimited puzzles
Multiple grid sizes (4x4 to 9x9)
Zen mode
Time trials
Achievements and leaderboards
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What's New in 0h n0

1.0.6

October 21, 2017

This app has been updated by Apple to display the Apple Watch app icon. Updated for iOS 11.

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In-App Purchases

$0.99

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User reviews

So fun

It’s great if you like sudoku or similar games, I just wish I could restart a board or pause and return to a board later. Then the game would be perfect

Absolutely Obsessed

It is so simple, yet so effective. It’s a great puzzler to unwind as it is just difficult enough to challenge you but not impossible. Additionally the fact that you can determine your own level of difficulty of the puzzle every time is wonderful.

10/10 have shared with so many people.

Fantastic

0h n0 is easy to understand and fun to master. You can choose between a range of boards, the bigger the board, the more patterns to analyze and solve. Lower boards are great for new players to make sure they don't get overwhelmed and incrementally level-up. As they become a seasoned player they may know that each board can be completed without guessing, so the different sized boards can offer a zen like experience as they zip their way to completion. Every individual has a different baseline level of stimulation, allowing seasoned players to go back to the earlier boards and find their own zen board. My zen board is the 5x5.

The competitive aspect is engaging for me personally. I compete with myself for the best times, but try to go for the endurance "boards completed" leaderboard for my zen board. I've been tracking a few active players in a spreadsheet and it's cool to see our rates vs absolute scores.

The app itself is distraction free. No ads. No internet required. You can play anytime, anywhere, and fully immerse yourself into the game.

The app does have some imperfections, right now there are 3 main bugs with the app, first is that you can't skip through the menu making the "impatient" achievement impossible, and the second is opening game center sometimes crashes the game. Pairing those two together can be annoying for competitive play. The other bug is that the timer gets disabled when you visit certain menus (How to play does this i think).

I've also had some fun exploring potential shortcuts to save time. I've found out two major time savers which I call the blind dot rule and the related dot rule. I leave that as an exercise for the reader 😉

Overall, great game! ❤️
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I love this game

This is still, after quite a few years, one of my favorite “go to” (uh, “g0 t0”?) games on the iPad. I know it hasn’t been updated in ages, and I’m fine with that, but one day I hope the developer can treat us to a new version with larger puzzles. 9x9s are too easy after a few thousand of them. :)

App Store Hidden Gem

Quickly became my favorite puzzle game - and I’ve got a few! The replayability is glorious. Well done!!

Developer apps

FAQ

What is 0h n0?

0h n0 is a logic puzzle game that challenges you to complete grids by placing blue and red dots. Blue dots have visibility rules based on their row and column, and their numbers indicate how many they can see. Red dots block visibility. The goal is to solve the grid without any guessing.

What are the main features of 0h n0?

The game offers unlimited logic puzzles across various grid sizes, from 4x4 to 9x9. Players can enjoy a pressure-free Zen mode, compete against their best times in time trials, unlock achievements, and climb leaderboards.

Is 0h n0 free to play?

Yes, 0h n0 is completely free to play. It is offered as a gift with no ads, no social network requirements, no locked features, and no nag screens.

What devices is 0h n0 compatible with?

While specific device compatibility isn't detailed, the app is available for mobile devices. It can also be played on the web at 0hn0.com, suggesting broad accessibility.

How do I play 0h n0?

To play, you tap tiles to make them either blue or red. Blue dots follow specific visibility rules based on their row and column, and their numbers indicate how many other dots they can see. Red dots act as blockers. The objective is to fill the grid correctly according to these rules.