# Sky Stack vs STACK

The clearest difference is in-app purchases: Sky Stack at none against STACK's 5. Sky Stack also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. STACK sells 5 one-off in-app purchases. Sky Stack asks for nothing beyond the download.

## The numbers

| Metric | Sky Stack | STACK |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 2 weeks |
| Size | 3 MB | 25 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Moamen Basel](https://appshunter.io/developer/1672877876) | [Jonathan Rycx](https://appshunter.io/developer/6776471796) |

## What reviewers say

### Sky Stack

[App page](https://appshunter.io/ios/app/sky-stack-tower-stacker/id6792422777)

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

**In-app purchases:** none


### STACK

[App page](https://appshunter.io/ios/app/stack-tower-builder/id6796613603)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 250 Gems | $0.99 | one-time |
| 700 Gems | $2.99 | one-time |
| 1,500 Gems | $5.99 | one-time |
| Full Game | $7.99 | one-time |
| 3,500 Gems | $9.99 | one-time |


## Frequently asked questions

### Is Sky Stack free?

Sky Stack is free to download, with no in-app purchases.

### Is STACK free?

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

### Do Sky Stack or STACK have ads?

STACK shows ads; Sky Stack does not.

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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.*