# EIRP Calculator vs IGC H₂

The clearest difference is update cadence: IGC H₂ at every 5 days against EIRP Calculator's every 129 months. IGC H₂ also leads on iOS requirement (13.4 vs 17.5). 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.

EIRP Calculator ships an update every 129 months, IGC H₂ every 5 days. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | EIRP Calculator | IGC H₂ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 129 months | **Every 5 days** |
| Size | 0 MB | 17 MB |
| Requires iOS | 17.5 | **13.4** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Pulsely Consulting](https://appshunter.io/developer/475349326) | [Industrial Gas Consultants LLC](https://appshunter.io/developer/1725282233) |

## What reviewers say

### EIRP Calculator

[App page](https://appshunter.io/ios/app/eirp-calculator/id785448118)

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

**In-app purchases:** none


### IGC H₂

[App page](https://appshunter.io/ios/app/igc-h-co-unit-conversion-app/id6475814418)

**In-app purchases:** none


## Frequently asked questions

### Is EIRP Calculator free?

EIRP Calculator is free to download, with no in-app purchases.

### Is IGC H₂ free?

IGC H₂ is free to download, with no in-app purchases.

### Do EIRP Calculator or IGC H₂ have ads?

Neither EIRP Calculator nor IGC H₂ shows ads.

### Which is updated more often, EIRP Calculator or IGC H₂?

EIRP Calculator ships an update every 129 months, and IGC H₂ every 5 days. Most recently, EIRP Calculator was updated on October 26, 2026 and IGC H₂ on October 25, 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.*