# Zen Stack Masters vs Relax Coloring

Zen Stack Masters and Relax Coloring are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Zen Stack Masters sells 4 one-off in-app purchases and Relax Coloring sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Zen Stack Masters ships an update every 4 days, Relax Coloring every 5 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Zen Stack Masters | Relax Coloring |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 days |
| Size | 27 MB | 55 MB |
| Requires iOS | 18.6 | **18.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gal Itach](https://appshunter.io/developer/1867158254) | [Volodymyr Sichka](https://appshunter.io/developer/1125187457) |

## What reviewers say

### Zen Stack Masters

[App page](https://appshunter.io/ios/app/zen-stack-masters/id6758891728)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Second Chance Tokens | $0.99 | one-time |
| Infinite Zen Mode | $5.99 | one-time |
| 1000 Tokens Deal | $99.99 | one-time |
| Zen Master | $1000.00 | one-time |


### Relax Coloring

[App page](https://appshunter.io/ios/app/relax-coloring-calm-art/id6760304084)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Animals Pack | $2.99 | one-time |
| Flowers Pack | $2.99 | one-time |
| Food Pack | $2.99 | one-time |
| Anime Pack | $2.99 | one-time |


## Frequently asked questions

### Is Zen Stack Masters free?

Zen Stack Masters is free to download, with in-app purchases available.

### Is Relax Coloring free?

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

### Do Zen Stack Masters or Relax Coloring have ads?

Neither Zen Stack Masters nor Relax Coloring shows ads.

### Which is updated more often, Zen Stack Masters or Relax Coloring?

Zen Stack Masters ships an update every 4 days, and Relax Coloring every 5 days. Most recently, Zen Stack Masters was updated on October 28, 2026 and Relax Coloring on October 25, 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.*