# Zerko — Make every number zero.

> Puzzle game to make all numbers on the board zero by strategically placing blocks. (iPhone/iPad app by Maciej Targoni.)

- Source: https://appshunter.io/ios/app/zerko/id6470181559 (this page in markdown: same URL + `.md`)
- Developer: [Maciej Targoni](https://appshunter.io/developer/495165602)
- Category: Games, Casual, Puzzle
- Price: $2.99
- Rating: 4.90/5 from 14 App Store ratings · 15 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 100 MB
- Languages: American English
- Released: 2024-03-26
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/zerko/id6470181559/reviews.md

## What is Zerko?

Some call it reverse sudoku, while others call it a nullification game, but it's Zerko - a puzzle game filled with shapes, numbers, and a straightforward goal: make every number zero.

To achieve this, you need to strategically place blocks of various shapes and values so that the numbers on the board effectively "remove up" to zero.

Like all my games, this one too is about relaxation... Just chill. There are no points, no time pressure, no data collection, no in-app purchases, no ads, no nonsense ;) My only hope is that you'll enjoy it and that I'll be able to add new content and levels for you in the future.

Relaxing audio by: Marek Koszczyński

## Key features

- Zero-sum number puzzles
- Strategic block placement
- Relaxing gameplay
- No time pressure
- No in-app purchases
- No ads

## Recent user reviews (10 of 15)

All indexed reviews: https://appshunter.io/ios/app/zerko/id6470181559/reviews.md

### 3/5 — Zerko

*2026-01-19*

Schönes Spiel, aber leider nur 50 Level. Davon die ersten ziemlich einfach, so dass alle Level in einem Tag durch waren.

### 4/5 — Missing piece?

*2025-10-07*

I just downloaded the bundle and am enjoying the games! But I am stuck on level 39 because it seems there’s a missing piece (3). Please advise.  Screenshot available.

### 5/5 — The best period

*2025-04-09*

This developer is the best game developer on the App Store. Why don’t more people play!!! He understands logic and follow through like no one else. Thank you so much!!

### 5/5 — Developer Rating 10/10

*2025-01-08*

Why are there so few developers who understand puzzle gaming like Maciej Targoni? And why aren’t ALL of his games downloaded by millions of people?
These are sincere questions. I just don’t get it.
Consider: Classic crossword puzzles are among the most popular, longest lasting games in the world. They don’t have point systems or timers or IAPs. There are no boosters or pay-to-win nonsense. They simply encourage you to challenge yourself and enjoy the process of figuring out solutions at your own pace.

This is the philosophy behind the games of Maciej Targoni. He makes clever, minimalist games that focus on the essence of puzzle gaming: the joy of discovering solutions.
Thank you Mr. Margoni. We need more developers like you.

### 5/5 — 端末は計算が得意だなって再認識

*2024-12-31*

iPadが無かった頃、雑誌で様々なパズルを解いていたけど、合計にあう数でマスを埋める計算パズルは苦手だった私。リーズナブルなパズルパックが無かったらコレはプレイせずにいただろうが、超面白いボタンや立体崩しを一気に解くのは何となく勿体ないと感じ、コレを箸休めにプレイしたら、見た目とは裏腹、私でも軽快に解ける。雑誌とは違って「合計数が随時計算されるので分かりやすい」「数がブロックなので試行錯誤でハメ直せる」から、マス埋めてんだか消しゴム削ってんだか分からないという事が全く無くて楽しい。ピョコっと持ち上げる感覚などの操作もストレスゼロで心地良い。

### 5/5 — Got immersed

*2024-11-24*

I got so immersed in this fun app I completed them all. Solid, challenging but not too challenging.  I hope additional levels will be added.  Nicely done.

### 5/5 — New puzzle form!

*2024-08-10*

I love this new game mechanics! I hope that more levels are added, because a lot of these are pretty easy. Although, I'm totally stuck on the last one... That single '3' square is totally baffling me! [Oh boy, just figured it out... 🤦‍♂️]  Also, that haptic menu item does nothing on the iPad, it took me a while to realize what it's function was. 😆

### 5/5 — Love it, shame there are only 50 levels

*2024-06-08*

This game is right up my street, bit of logic, relaxing with no timers, scores or ads. 
Only downside is that I smashed through all the levels in a couple of days. It just loops you back to the beginning. 

I’d love there to be more levels :)

### 5/5 — More levels please

*2024-05-17*

I have purchased nearly every game by this developer and enjoy the approached of solving a puzzle for the fun of it. I didn’t buy this one for quite sometime thinking it would be like sudoku and continuously rechecking the numbers to see what is missing, it is not. It is delightful. 

How about the same concept but with words? That would be enjoyable too.

### 5/5 — More levels please!

*2024-04-26*

I own all of your games.  Keep up the great work!

**Developer response:** Thanks!

## Frequently asked questions about Zerko

### What is the main goal of Zerko?

The main goal of Zerko is to strategically place blocks of various shapes and values on the board so that all numbers on the board are reduced to zero.

### Does Zerko have ads?

No, Zerko is ad-free. The developer explicitly states there are no ads, allowing for an uninterrupted gaming experience.

### Is Zerko free to play?

No, Zerko is a paid application. It costs $2.99 to purchase and download.

### What devices does Zerko support?

Zerko is supported on iPhone, iPad, and iPod devices. It is designed for Apple's mobile operating system.

### Does Zerko have a time limit or scoring system?

No, Zerko is designed for relaxation and does not feature points or time pressure. You can play at your own pace without any stress.

### How often is Zerko updated?

Zerko was last updated on March 26, 2024, with version 1.0. The developer hopes to add new content and levels in the future.

### What is the age rating for Zerko?

Zerko has an age rating of 4+, making it suitable for a wide range of players.

### Does Zerko collect user data?

No, the developer states that Zerko does not collect any data from its users, ensuring privacy.

## Version history (last 2 releases)

### 1.0 — 2024-03-26

- Added Trailer

### 0.91 — 2024-03-05

No release notes.

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## More apps by Maciej Targoni

- [oO](https://appshunter.io/ios/app/oo/id834240887)
- ["HOOK"](https://appshunter.io/ios/app/hook/id956794130)
- ["Klocki"](https://appshunter.io/ios/app/klocki/id1105390093)
- ["PUSH"](https://appshunter.io/ios/app/push/id1257416763)
- [Up Left Out](https://appshunter.io/ios/app/up-left-out/id1339172788)
- [NABOKI](https://appshunter.io/ios/app/naboki/id1473480040)

All apps by Maciej Targoni: https://appshunter.io/developer/495165602

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*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 2026-08-24.*