# H2K foam calculator vs Dräger X

The clearest difference is update cadence: Dräger X at every 2 months against H2K foam calculator's every 12 months. H2K foam calculator's advantage is iOS requirement (14.0 vs 26.0). 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.

H2K foam calculator ships an update every 12 months, Dräger X every 2 months. The most recent releases landed on September 19, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | H2K foam calculator | Dräger X |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 2 months** |
| Size | 46 MB | 65 MB |
| Requires iOS | **14.0** | 26.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Vasio B.V.](https://appshunter.io/developer/458166585) | [Draegerwerk AG & Co. KGaA](https://appshunter.io/developer/646307986) |

## What reviewers say

### H2K foam calculator

[App page](https://appshunter.io/ios/app/h2k-foam-calculator/id1521808540)

**Features:** macOS Compatibility

**In-app purchases:** none


### Dräger X

[App page](https://appshunter.io/ios/app/drager-x-node/id1594368718)

**In-app purchases:** none


## Frequently asked questions

### Is H2K foam calculator free?

H2K foam calculator is free to download, with no in-app purchases.

### Is Dräger X free?

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

### Do H2K foam calculator or Dräger X have ads?

Neither H2K foam calculator nor Dräger X shows ads.

### Which is updated more often, H2K foam calculator or Dräger X?

H2K foam calculator ships an update every 12 months, and Dräger X every 2 months. Most recently, H2K foam calculator was updated on September 19, 2026 and Dräger X on September 13, 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.*