Free
In-App Purchases

Details

  • Released
  • Updated
  • June 29, 2014
  • January 7, 2026

Features

+ & - : A Zen game screenshot #1 for iPhone
+ & - : A Zen game screenshot #2 for iPhone
+ & - : A Zen game screenshot #3 for iPhone
+ & - : A Zen game screenshot #4 for iPhone
+ & - : A Zen game screenshot #5 for iPhone
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About

A strategic puzzle game with a Zen-like feel. Combine numbers based on their color and value to achieve the highest score. Save multiple games simultaneously and unlock special abilities as you progress.

Strategic number addition and subtraction
Save and manage multiple games
Unlockable number swapping ability
Customizable board and UI colors
Zen-like gameplay experience
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What's New in + &

2.3.2

January 7, 2026

• removed the button to access Game Center which has been disabled

1

In-App Purchases

$0.99

Change The Number

To buy touch two numbers on the board (make a move), then touch one of the three buttons that will appear on the top of the screen, a popup for in-app purchase will appear.

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User reviews

Great App

The object of this game is to get a high score. Your working on a 16 square grid that contains two colors. Sounds simple right. You achieve this goal by adding and subtracting numbers. However, there are rules that govern how this math can be done. To add, both numbers must be the same and come from the same color. To subtract, the numbers must be different and come from different colors. You'll find that you' ll often make a mistake and when you do, another number will be added to the grid. Once the grid fills up, it's game over. Going for the highest score possible isn't easy. Part of the problem is that there is no Save Game Feature. So you must achieve your best score all in one sitting. If they add this feature, this will be one of the best apps you can get, hands down.
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FAQ

How do you play + & - : A Zen game?

You tap two numbers. If they have equal numbers on a background of equal color, they are added. If they have different numbers on a background of different color, they are subtracted. The result replaces the second number tapped. The goal is to achieve the highest score.

Can I play multiple games of + & - : A Zen game at once?

Yes, you can save the current game and start a new one, allowing you to play up to 9 games simultaneously.

What happens when I reach 500 points in + & - : A Zen game?

Once you exceed 500 points, you unlock the ability to swap the numbers of two quartets of different colors by dragging one over the other.

Does + & - : A Zen game have ads?

No, this game does not contain advertisements, offering an uninterrupted experience.

How many color combinations are available in + & - : A Zen game?

You can customize the colors of the board with 351 different combinations, and also change the user interface color to light or dark.

What devices is + & - : A Zen game compatible with?

+ & - : A Zen game is available for iPhone, iPad, and iPod devices.

What is the age rating for + & - : A Zen game?

The game has an age rating of 4+, making it suitable for younger players.

How often is + & - : A Zen game updated?

The latest version is 2.3.2, and it was last updated on January 7, 2026. This suggests a consistent update schedule.