# Pen Stacks vs Animal Knockout

The clearest difference is iOS requirement: Pen Stacks at 13.0 against Animal Knockout'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 | Pen Stacks | Animal Knockout |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (23 ratings)](https://appshunter.io/ios/app/pen-stacks/id6751919982/reviews)** | — |
| Number of ratings | **23** | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | — | Every 3 days |
| Monetization | Ad-supported | — |
| Size | 156 MB | 128 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 9+ |
| Developer | [Kaliba Games & Technologies Inc.](https://appshunter.io/developer/1549023239) | [Furkan Savas](https://appshunter.io/developer/1840487666) |

## What reviewers say

### Pen Stacks

[App page](https://appshunter.io/ios/app/pen-stacks/id6751919982)

Match same-colored pencils and stack them to guide them to the sharpener. Navigate through levels filled with blockers. A colorful and engaging puzzle experience awaits.

**Highlights:** Match same-colored pencils, Stack pencils, Guide pencils to sharpener, Overcome blockers, Colorful puzzle gameplay

**Features:** macOS Compatibility

**In-app purchases:** none


### Animal Knockout

[App page](https://appshunter.io/ios/app/animal-knockout/id6778966240)

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

**In-app purchases:** none


## Frequently asked questions

### Is Pen Stacks free?

Pen Stacks is free to download, with no in-app purchases.

### Is Animal Knockout free?

Animal Knockout is free to download, with no in-app purchases.

### Do Pen Stacks or Animal Knockout have ads?

Both Pen Stacks and Animal Knockout 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.*