# Mars Defender vs Card Stack

Mars Defender and Card Stack are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support 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. Mars Defender sells 5 one-off in-app purchases and Card Stack sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Mars Defender | Card Stack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (8 ratings)](https://appshunter.io/ios/app/card-stack-color-sort-puzzle/id6801527612/reviews)** |
| Number of ratings | — | **8** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Size | 82 MB | 203 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Valentina Prossapchuk](https://appshunter.io/developer/1895013467) | [INSTA Games](https://appshunter.io/developer/1662392232) |

## What reviewers say

### Mars Defender

[App page](https://appshunter.io/ios/app/mars-defender/id6762791745)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Gold Pack | $0.99 | one-time |
| Medium Gold Pack | $1.99 | one-time |
| Remove ads | $2.99 | one-time |
| Starter Pack | $3.99 | one-time |
| Large Gold Pack | $4.99 | one-time |


### Card Stack

[App page](https://appshunter.io/ios/app/card-stack-color-sort-puzzle/id6801527612)

A vibrant card puzzle game focused on color sorting and strategic planning. Match cards by color, organize them into their stacks, and clear the board. Offers simple rules with increasingly challenging levels.

**Highlights:** Color sorting card gameplay, Cards with numbers, letters, and symbols, Simple, easy-to-understand rules, Increasingly challenging levels, Variety of card layouts, Strategic planning elements, Intuitive controls

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No ADS | $9.99 | one-time |


## Frequently asked questions

### Is Mars Defender free?

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

### Is Card Stack free?

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

### Do Mars Defender or Card Stack have ads?

Both Mars Defender and Card Stack show ads.

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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.*