# Smart Green Converter vs IGC H₂

The clearest difference is update cadence: IGC H₂ at every 5 days against Smart Green Converter's every 7 months. 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.

Smart Green Converter ships an update every 7 months, IGC H₂ every 5 days. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Smart Green Converter | IGC H₂ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/smart-green-converter/id970629053/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 18 MB | 17 MB |
| Requires iOS | 14.0 | **13.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Green Flame Gas Co](https://appshunter.io/developer/1479226447) | [Industrial Gas Consultants LLC](https://appshunter.io/developer/1725282233) |

## What reviewers say

### Smart Green Converter

[App page](https://appshunter.io/ios/app/smart-green-converter/id970629053)

Easily convert between various units of measurement for gases, including length, power, volume, mass, and pressure. Share your conversion results via email or SMS, or copy them to your notes.

**Highlights:** Unit of Measurement Conversion, Length Units, Power Units, Volume Units, Mass Units, Pressure Units, Share Conversion Results

**Features:** macOS Compatibility

**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 Smart Green Converter free?

Smart Green Converter 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 Smart Green Converter or IGC H₂ have ads?

Neither Smart Green Converter nor IGC H₂ shows ads.

### Which is updated more often, Smart Green Converter or IGC H₂?

Smart Green Converter ships an update every 7 months, and IGC H₂ every 5 days. Most recently, Smart Green Converter was updated on November 1, 2026 and IGC H₂ on November 4, 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.*