quadline vs Zerko
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
quadline
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.
- Line manipulation puzzles
- 175+ unique levels
- No timers or pressure
- Intuitive one-tap controls
- Minimalistic design
- Built-in solutions
Read full descriptionHide full description
Move lines through the cells to put them in specific slots. Rotate, move, push or teleport them and use other game tools to solve fun puzzles. • New unique puzzle mechanics with high variety and complexity • 175+ individually designed levels based on 10 core mechanics and their combinations • No timers or pressure: just you and puzzles • Self-explanatory flow that doesn’t need any interruptive tutorials • Minimalistic, clean and simple design • Symmetrical gameplay experience • Light and Dark mode • Colorblind-friendly • One-tap controls • Built-in solutions • Not a single text line :) Enjoy!
Zerko
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.
- Zero-sum number puzzles
- Strategic block placement
- Relaxing gameplay
- No time pressure
- No in-app purchases
- No ads
Read full descriptionHide full description
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
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | quadline | Zerko |
|---|---|---|
| Price | $1.99 — better | $2.99 |
| Rating | 4.8 (69 ratings) | 4.9 (14 ratings) — better |
| Positive reviews | 95.0% of reviews — better | 93.3% of reviews |
| Number of ratings | 69 — better | 14 |
| Update frequency | Every 10 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod, Mac, Apple TV — better | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 56 MB | 100 MB |
| Age rating | 4+ | 4+ |
| Developer | Kovalov Ivan | Maciej Targoni |
Customer experience
quadline
Zerko
In-app purchases
quadline
No in-app purchases
Zerko
No in-app purchases
