# quadline vs Zerko

The clearest difference is update cadence: Zerko at every 3 weeks against quadline's every 10 months. quadline's advantage is ratings volume (69 vs 14) and device support (5 vs 3). On rating, review sentiment, ads and in-app purchases there is nothing between them.

quadline costs $1.99 and Zerko $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.8 for quadline against 4.9 for Zerko. Both are backed by a comparable volume of ratings — 69 and 14 respectively. Written reviews are what separate them: 95% of quadline's written reviews are positive against 93% of Zerko's.

quadline ships an update every 10 months, Zerko every 3 weeks. The most recent releases landed on September 17, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | quadline | Zerko |
| --- | --- | --- |
| Price | **$1.99** | $2.99 |
| Rating | [4.8 (69 ratings)](https://appshunter.io/ios/app/quadline/id1575569233/reviews) | **[4.9 (14 ratings)](https://appshunter.io/ios/app/zerko/id6470181559/reviews)** |
| Number of ratings | **69** | 14 |
| Positive reviews | **95.0% of reviews** | 93.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 3 weeks** |
| Monetization | Paid | Paid |
| Size | 56 MB | 100 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod, Mac, Apple TV** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kovalov Ivan](https://appshunter.io/developer/1184935723) | [Maciej Targoni](https://appshunter.io/developer/495165602) |

## What reviewers say

### quadline

[App page](https://appshunter.io/ios/app/quadline/id1575569233)

Engage your mind with inventive puzzles where you manipulate lines to fit into specific slots. Explore over 175 unique levels utilizing a variety of mechanics without time pressure. Enjoy a clean, minimalistic design with intuitive controls and built-in solutions.

**Highlights:** Line manipulation puzzles, 175+ unique levels, No timers or pressure, Intuitive one-tap controls, Minimalistic design, Built-in solutions

**Features:** Vision Pro support

**In-app purchases:** none


### Zerko

[App page](https://appshunter.io/ios/app/zerko/id6470181559)

A relaxing puzzle game where you strategically place blocks to make all numbers on the board equal zero. Enjoy a no-pressure experience with calming audio and no in-app purchases or ads.

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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is quadline free?

quadline costs $1.99, with no in-app purchases.

### Is Zerko free?

Zerko costs $2.99, with no in-app purchases.

### Which has better reviews, quadline or Zerko?

Zerko is rated higher. quadline averages 4.8 out of 5 from 69 ratings, while Zerko averages 4.9 from 14 ratings.

### Do quadline or Zerko have ads?

Neither quadline nor Zerko shows ads.

### Which is updated more often, quadline or Zerko?

quadline ships an update every 10 months, and Zerko every 3 weeks. Most recently, quadline was updated on September 17, 2026 and Zerko on September 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*