YANKAI'S DIAMOND vs Zerko
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
YANKAI'S DIAMOND
Experience a handcrafted puzzle game with an infinite number of beautiful levels. This game is a tribute to diamonds, offering a unique and engaging challenge for players.
- Handcrafted levels
- Infinite level generation
- Diamond-themed puzzles
- Engaging gameplay
- Beautiful design
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Yankai's Diamond is a love letter to diamonds. A puzzle game with a handcrafted infinity of beautiful levels.
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
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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
YANKAI'S DIAMOND and Zerko both sit at 4.7 stars, but that hides the real split: 93% of Zerko's written reviews are positive against 50% of YANKAI'S DIAMOND's. YANKAI'S DIAMOND's advantage is ratings volume (45 vs 14) and iOS requirement (10.0 vs 12.0). On price, rating, update cadence and ads 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
YANKAI'S DIAMOND costs $2.99 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 — 4.7 for YANKAI'S DIAMOND against 4.9 for Zerko. Both are backed by a comparable volume of ratings — 45 and 14 respectively. Written reviews are what separate them: 50% of YANKAI'S DIAMOND's written reviews are positive against 93% of Zerko's.
Both ship on a similar rhythm, roughly every 3 weeks. Both last shipped on October 24, 2026.
| Parameter | YANKAI'S DIAMOND | Zerko |
|---|---|---|
| Price | $2.99 | $2.99 |
| Rating | 4.7 (45 ratings) | 4.9 (14 ratings) — better |
| Positive reviews | 50.0% of reviews | 93.3% of reviews — better |
| Number of ratings | 45 — better | 14 |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 97 MB | 100 MB |
| Age rating | 4+ | 4+ |
| Developer | Kenny Sun | Maciej Targoni |
Customer experience
YANKAI'S DIAMOND
Zerko
In-app purchases
YANKAI'S DIAMOND
No in-app purchases
Zerko
No in-app purchases
Questions
Is YANKAI'S DIAMOND free?
Is Zerko free?
Which has better reviews, YANKAI'S DIAMOND or Zerko?
Do YANKAI'S DIAMOND or Zerko have ads?
Which is updated more often, YANKAI'S DIAMOND or Zerko?
Other comparisons
