Zerko vs Kestli
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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
Kestli
Engage your mind with a logic puzzle game where you unblock and arrange falling stones. Solve beautifully crafted puzzles to relax and experience a deeply satisfying challenge. Daily puzzles and hints are available to enhance your gameplay.
- Unblock and arrange falling stones
- Hand-crafted puzzles
- Daily puzzles
- No internet required for gameplay
- Hint system available
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Unblock and arrange the falling stones in this novel and innovative game of logic. The beautiful hand-crafted puzzles will relax you mind. Slide the blocks in the correct order to fit them into the target area. But watch out: Once the stones have fallen down, they cannot be moved upwards again. Finding the solution — when the last stone snaps into place — is a deeply satisfying experience. The name “Kestli” (pronounced KEST-lee) means “small boxes” in some German dialects and also sounds similar to the name of this game’s inventor, Johannes Kestler. Features: • Puzzle packs with various sizes and difficulty levels • Daily puzzles for your daily extra dose of joy • No internet connection required (except for downloading new puzzles) • Hints available if you are really stuck
Screenshots
Verdict
The clearest difference is price: Kestli at Free against Zerko's $2.99. Kestli also leads on update cadence (every 9 days vs every 3 weeks). Zerko's advantage is in-app purchases (none vs 3) and ads (none vs shown). On device support and iOS requirement 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
Kestli is free to download; Zerko costs $2.99 up front. Kestli sells 3 one-off in-app purchases. Zerko asks for nothing beyond the download.
Zerko holds the better App Store score, 4.9 against 4.5. That said, the two scores are not equally well evidenced: Zerko has 14 ratings behind it against 2, so its average is the more settled of the two.
Zerko ships an update every 3 weeks, Kestli every 9 days. The most recent releases landed on September 11, 2026 and September 15, 2026 respectively.
| Parameter | Zerko | Kestli |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.9 (14 ratings) — better | 4.5 (2 ratings) |
| Positive reviews | 93.3% of reviews | — |
| Number of ratings | 14 — better | 2 |
| Update frequency | Every 3 weeks | Every 9 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 100 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Maciej Targoni | Johannes Kestler |
Customer experience
Zerko
Kestli
In-app purchases
Zerko
No in-app purchases
Kestli
- 5 hints$0.99
- 20 hints$1.99
- 70 hints$4.99
