# Pulmonary vs ArkAttack

The clearest difference is price: Pulmonary at Free against ArkAttack's $0.99. Pulmonary also leads on update cadence (every 4 months vs every 20 months). ArkAttack's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

Pulmonary is free to download; ArkAttack costs $0.99 up front. Pulmonary sells 1 one-off in-app purchase. ArkAttack asks for nothing beyond the download.

Pulmonary ships an update every 4 months, ArkAttack every 20 months. The most recent releases landed on September 9, 2026 and August 16, 2026 respectively.

## The numbers

| Metric | Pulmonary | ArkAttack |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[2.3 (3 ratings)](https://appshunter.io/ios/app/pulmonary/id1215076838/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 20 months |
| Monetization | Free with in-app purchases | — |
| Size | 52 MB | 4 MB |
| Requires iOS | **16.4** | 16.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tommy Soereide Kjaer](https://appshunter.io/developer/1215076837) | [Gianluca Natalini](https://appshunter.io/developer/348380792) |

## What reviewers say

### Pulmonary

[App page](https://appshunter.io/ios/app/pulmonary/id1215076838)

A challenging puzzle game that requires players to use past information to navigate obscured paths. Test your logic and problem-solving skills in this unique experience.

**Highlights:** Obscured path navigation, Information-based gameplay, Logic puzzles, Problem-solving challenges, Unique game mechanics

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 11 New Stages | $0.99 | one-time |


### ArkAttack

[App page](https://appshunter.io/ios/app/arkattack/id1668434525)

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

**In-app purchases:** none


## Frequently asked questions

### Is Pulmonary free?

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

### Is ArkAttack free?

ArkAttack costs $0.99, with no in-app purchases.

### Do Pulmonary or ArkAttack have ads?

Neither Pulmonary nor ArkAttack shows ads.

### Which is updated more often, Pulmonary or ArkAttack?

Pulmonary ships an update every 4 months, and ArkAttack every 20 months. Most recently, Pulmonary was updated on September 9, 2026 and ArkAttack on August 16, 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.*