# Penguin X vs Underwater Runner

The clearest difference is update cadence: Underwater Runner at every 4 days against Penguin X's every 2 months. Penguin X's advantage is iOS requirement (11.0 vs 13.0). 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.

Penguin X ships an update every 2 months, Underwater Runner every 4 days. The most recent releases landed on February 24, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Penguin X | Underwater Runner |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 4 days** |
| Size | 200 MB | 182 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Onacasoft Co., Ltd.](https://appshunter.io/developer/323364370) | [Ankit Kanani](https://appshunter.io/developer/1800427460) |

## What reviewers say

### Penguin X

[App page](https://appshunter.io/ios/app/penguin-x/id1575368524)

**Features:** macOS Compatibility

**In-app purchases:** none


### Underwater Runner

[App page](https://appshunter.io/ios/app/underwater-runner/id6742896513)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Penguin X free?

Penguin X is free to download, with no in-app purchases.

### Is Underwater Runner free?

Underwater Runner is free to download, with no in-app purchases.

### Do Penguin X or Underwater Runner have ads?

Both Penguin X and Underwater Runner show ads.

### Which is updated more often, Penguin X or Underwater Runner?

Penguin X ships an update every 2 months, and Underwater Runner every 4 days. Most recently, Penguin X was updated on February 24, 2026 and Underwater Runner on September 9, 2026.

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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.*