# Bus Loop! vs Pen Stacks

Bus Loop! and Pen Stacks 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. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Bus Loop! | Pen Stacks |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (21 ratings)](https://appshunter.io/ios/app/pen-stacks/id6751919982/reviews)** |
| Number of ratings | — | **21** |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Daily | — |
| Monetization | — | Ad-supported |
| Size | 107 MB | 156 MB |
| Requires iOS | 14.5 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Nebih Basaran](https://appshunter.io/developer/1586973680) | [Kaliba Games & Technologies Inc.](https://appshunter.io/developer/1549023239) |

## What reviewers say

### Bus Loop!

[App page](https://appshunter.io/ios/app/bus-loop/id6749436562)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Bus Loop! free?

Bus Loop! is free to download, with no in-app purchases.

### Is Pen Stacks free?

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

### Do Bus Loop! or Pen Stacks have ads?

Both Bus Loop! and Pen Stacks 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.*