# KooZac™ — Add the Falling Blocks

> Falling block puzzle game combining Tetris and Sudoku mechanics to form target numbers. (iPhone/iPad app by Rekiv.)

- Source: https://appshunter.io/ios/app/koozac/id502803445 (this page in markdown: same URL + `.md`)
- Developer: [Rekiv](https://appshunter.io/developer/1477461406)
- Category: Games, Education, Board, Puzzle
- Price: Free with in-app purchases
- Rating: 3.82/5 from 592 App Store ratings · 187 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 141 MB
- Languages: English
- Released: 2012-08-21
- Data updated: 2026-06-10
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/koozac/id502803445/reviews.md

## What is KooZac™?

The award-winning, cult-classic KooZac is back with a fresh new look for mobile.
 
KooZac is a game caught between Tetris and Sudoku that’s as challenging as it is entertaining. The concept is simple: position the falling blocks on top of each other to create the target numbers and clear the blocks.
 
Described as utterly addictive yet surprisingly educational, KooZac takes the best bits of a block puzzler and a mental challenge game to produce one hard-to-put-down revelation.
 
-        Free to play forever
-        Easy to learn, endless fun to play
-        Like Tetris with numbers
-        Designed to improve mental arithmetic
-        Beat your high score

 

 SHOW US SOME LOVE!
 
Love KooZac? Don’t forget to rate us.
 
GET IN TOUCH!
 
And you can find us on Facebook: http://www.facebook.com/KooZac or http://www.facebook.com/VikerGames to discover other great games like KooZac.

## Key features

- Falling block puzzle gameplay
- Combines Tetris and Sudoku elements
- Create target numbers to clear blocks
- Improves mental arithmetic
- Beat high scores
- Free to play

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| package of 800 coins | $0.99 | one-time |
| package of 2000 coins | $1.99 | one-time |
| package of 110000 coins | $29.99 | one-time |
| package of 10000 coins | $4.99 | one-time |
| package of 30000 coins | $9.99 | one-time |
| No More Ads! | $1.99 | one-time |


## What do users think of KooZac™?

Overall sentiment: neutral

**Pros**

- 👍 Addictive gameplay
- 💡 Challenging brain-teasing
- 🚀 Quick and responsive
- 👍 Good for kids and adults

**Cons**

- 🐛 Crashes and freezes
- 🔋 Drains battery quickly
- 👎 Confusing controls
- 👎 Lack of difficulty progression

**Commonly reported bugs**

- Losing progress on update
- Game Center integration issues
- Incompatibility with iPhone 5 screen
- Incorrect target values displayed

**Most requested features**

- More levels and difficulty modes
- Horizontal math operations
- Ability to resume from last played level
- Improved tutorial and instructions

## Recent user reviews (10 of 187)

All indexed reviews: https://appshunter.io/ios/app/koozac/id502803445/reviews.md

### 1/5 — Too easy vs 1.0

*2018-10-22, version 2.3*

Have the 1.0 on my iPad and each block creates a new challenge. I downloaded this for my phone and it’s a whole different game. Disappointing and will uninstall it. Bring back the 1.0 version or make it a separate game. Old game is amazing!

### 3/5 — New version means extra adverts

*2017-11-27, version 2.2*

I have had the original for a long time and enjoyed playing many times.

This new update has changed the feel of the game and just as importantly introduced adverts including videos so I won’t be playing the latest version.

Sad but a good game just got worse.

### 1/5 — What's with the new layout?

*2017-11-27, version 2.2*

So this app was bought by another company from SquareEnix. It pretty much made it an endless mode with ads in between each milestone.

### 5/5 — Great

*2014-05-10, version 2.1*

Excellent.

### 1/5 — Used to Love the game

*2013-11-25*

I have deleted it because it is just taking up space that can used for other apps that get updated on a regular basis. 

I had previously dropped it to three stars from five and now it's a one because I am tired of waiting for an update.  I never bought coins or used boosters and was able to complete the three stages.  It needs updating NOW!  I have begged, pleaded, and threatened to delete.  That was six months ago.  I posted on Facebook,mTwitter, etc. and still nothing.

I don't want to blitz, I want to play in peace and quiet.  This is my favorite game on the iPad. UPDATE! FOR THOSE OF US WHO DON'T LIKE RPG! RUNNER, PLEASE UPDATE!!!

The only problem is that I finished all the levels several months ago and I need more or I will have to delete and find another game  that I won't like half as much.  Please UPDATE!  Please!

### 4/5 — Great game

*2013-11-12, version 2.1*

I love this game. It is a mixture of Tetris with math. Where are all the new levels that were promised?

### 5/5 — Great game

*2013-08-03, version 2.1*

Nice and very addictive

### 5/5 — Fun game

*2013-07-24, version 2.1*

Fun, simple game with slight challenges to keep the brain occupied.

### 3/5 — Fun, but needs improvement

*2013-07-13, version 2.1*

I love this game. I spend a lot of time playing it on my iPad. My only issue with it is that sometimes the numbers it drops out are too big for ones already used. Fix those bugs and it may get five stars.

### 4/5 — Good game

*2013-06-24, version 2.1*

Quick thinking for the kids

## Frequently asked questions about KooZac™

### What is KooZac?

KooZac is a puzzle game that blends the mechanics of Tetris and Sudoku. Players must strategically place falling blocks to form specific target numbers, clearing the blocks from the game board. It's designed to be both entertaining and a tool for improving mental arithmetic.

### How do you play KooZac?

The core gameplay involves positioning falling blocks on top of each other to create the designated target numbers. Successfully forming these numbers allows you to clear blocks from the board. The game is easy to learn but offers endless fun and challenge as you aim to beat your high score.

### Is KooZac free to play?

Yes, KooZac is free to play forever. While the core game is accessible without cost, it does offer in-app purchases, which are common for enhancing the player experience or providing optional content.

### What are the benefits of playing KooZac?

KooZac is described as being surprisingly educational, with a specific focus on improving mental arithmetic skills. Beyond its cognitive benefits, it's also designed to be utterly addictive and provide endless fun for players who enjoy challenging block puzzlers.

### What kind of device can I play KooZac on?

KooZac has been updated with a fresh new look specifically for mobile devices. While the exact compatibility details (e.g., iOS/Android versions) are not specified in the description, it is designed to run on modern smartphones and tablets.

## Version history (last 5 releases)

### 2.3 — 2017-11-30

This app has been updated by Apple to display the Apple Watch app icon.

More numbers, targets and combo's added

### 2.2 — 2017-11-26

All New KooZac....

### 2.1 — 2012-10-29

Hello KooZac Fans

Thank you for playing KooZac, in this update we have:

• Game speed optimised 
• Reported crash bugs fixed
• Particle effects reduced

Help us make your KooZac experience even better and join Facebook.com/KooZac

More updates are coming soon and don’t forget to rate this update.

Keep playing.

### 2.0 — 2012-09-05

Hello KooZac Fans

Thank you for playing KooZac, in this update we have:

• Added invite Facebook friends function
• The ability to listen to your own music whilst playing
• Optimised Kanji font

Help us make your KooZac experience even better and join Facebook.com/KooZac

More updates are coming soon and don’t forget to rate this update.

Keep playing.

### 1.0 — 2012-07-31

No release notes.

## Apps similar to KooZac™

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Add to 10 Plus: Number Game](https://appshunter.io/ios/app/add-to-10-plus-number-game/id1222433850) | 4.6 (65) | Free | Games |
| [Blocks Slides](https://appshunter.io/ios/app/blocks-slides/id6451200290) | — | Free | Games |
| [Wood Sudoko - Wood Puzzle Game](https://appshunter.io/ios/app/wood-sudoko-wood-puzzle-game/id1506483076) | — | Free | Games |
| [Tiles - Matching Puzzle Art AI](https://appshunter.io/ios/app/tiles-matching-puzzle-art-ai/id6449296572) | 4.8 (1,148) | Free | Games |
| [Match and Blast!](https://appshunter.io/ios/app/match-and-blast/id6462699962) | — | Free | Games |
| [DropNumber+](https://appshunter.io/ios/app/dropnumber-plus/id899036402) | 4.9 (7) | Free | Games |

## More apps by Rekiv

- [Stickers Against Friends](https://appshunter.io/ios/app/stickers-against-friends/id1188341575)
- [Amazeballs: Block Puzzle Game](https://appshunter.io/ios/app/amazeballs-block-puzzle-game/id1219662447)
- [Word Puzzles](https://appshunter.io/ios/app/word-puzzles/id1352919318)
- [Bloxy Puzzles](https://appshunter.io/ios/app/bloxy-puzzles/id1354915330)
- [Puzzles](https://appshunter.io/ios/app/puzzles/id1445536138)

All apps by Rekiv: https://appshunter.io/developer/1477461406

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*