# SkyTower Challenge vs Blocker Stack

The clearest difference is iOS requirement: Blocker Stack at 12.0 against SkyTower Challenge's 15.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | SkyTower Challenge | Blocker Stack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | — |
| Size | 171 MB | 134 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Takuma Takahashi](https://appshunter.io/developer/1704744113) | [Plainsight games LTD](https://appshunter.io/developer/1725090177) |

## What reviewers say

### SkyTower Challenge

[App page](https://appshunter.io/ios/app/skytower-challenge/id6464111672)

**Features:** macOS Compatibility

**In-app purchases:** none


### Blocker Stack

[App page](https://appshunter.io/ios/app/blocker-stack/id6478495421)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SkyTower Challenge free?

SkyTower Challenge is free to download, with no in-app purchases.

### Is Blocker Stack free?

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

### Do SkyTower Challenge or Blocker Stack have ads?

Both SkyTower Challenge and Blocker Stack show ads.

---

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