# Directional Survey Methods vs IGC H₂

The clearest difference is update cadence: IGC H₂ at every 5 days against Directional Survey Methods's every 50 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.

Directional Survey Methods ships an update every 50 months, IGC H₂ every 5 days. The most recent releases landed on October 1, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Directional Survey Methods | IGC H₂ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 50 months | **Every 5 days** |
| Size | 7 MB | 17 MB |
| Requires iOS | **12.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carlos Moura](https://appshunter.io/developer/407501202) | [Industrial Gas Consultants LLC](https://appshunter.io/developer/1725282233) |

## What reviewers say

### Directional Survey Methods

[App page](https://appshunter.io/ios/app/directional-survey-methods/id1130800392)

**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 Directional Survey Methods free?

Directional Survey Methods 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 Directional Survey Methods or IGC H₂ have ads?

Neither Directional Survey Methods nor IGC H₂ shows ads.

### Which is updated more often, Directional Survey Methods or IGC H₂?

Directional Survey Methods ships an update every 50 months, and IGC H₂ every 5 days. Most recently, Directional Survey Methods was updated on October 1, 2026 and IGC H₂ on September 29, 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.*