# Zerko vs Kestli

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.

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.

## The numbers

| Metric | Zerko | Kestli |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.9 (14 ratings)](https://appshunter.io/ios/app/zerko/id6470181559/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/kestli/id6478221882/reviews) |
| Number of ratings | **14** | 2 |
| Positive reviews | 93.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 100 MB | 28 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Maciej Targoni](https://appshunter.io/developer/495165602) | [Johannes Kestler](https://appshunter.io/developer/711411336) |

## What reviewers say

### 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


### Kestli

[App page](https://appshunter.io/ios/app/kestli/id6478221882)

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.

**Highlights:** Unblock and arrange falling stones, Hand-crafted puzzles, Daily puzzles, No internet required for gameplay, Hint system available

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 5 hints | $0.99 | one-time |
| 20 hints | $1.99 | one-time |
| 70 hints | $4.99 | one-time |


## Frequently asked questions

### Is Zerko free?

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

### Is Kestli free?

Kestli is free to download, with in-app purchases available.

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

Zerko is rated higher. Zerko averages 4.9 out of 5 from 14 ratings, while Kestli averages 4.5 from 2 ratings.

### Do Zerko or Kestli have ads?

Kestli shows ads; Zerko does not.

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

Zerko ships an update every 3 weeks, and Kestli every 9 days. Most recently, Zerko was updated on September 11, 2026 and Kestli on September 15, 2026.

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