# GasUnits vs Halliday G2

The clearest difference is update cadence: Halliday G2 at every 4 days against GasUnits's every 10 days. 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.

GasUnits ships an update every 10 days, Halliday G2 every 4 days. The most recent releases landed on October 7, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | GasUnits | Halliday G2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/gasunits/id6762513689/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 4 days** |
| Monetization | Free | — |
| Size | 30 MB | 71 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vivek Chandra](https://appshunter.io/developer/461237208) | [HALLIDAY HOLDINGS PTE. LTD.](https://appshunter.io/developer/1808849381) |

## What reviewers say

### GasUnits

[App page](https://appshunter.io/ios/app/gasunits/id6762513689)

This app simplifies complex natural gas and LNG unit conversions for industry professionals. It accurately converts over 90 volume, rate, and price units, offering precise results and composition-based estimates. Easily copy formatted results for reports and models.

**Highlights:** Converts 90+ gas volume, rate, and price units, Supports three standard gas heating values, Calculates barrels of oil equivalent, Provides composition-based estimates, Fast, intuitive, and error-proof design, Copy results for reports and models

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

**In-app purchases:** none


### Halliday G2

[App page](https://appshunter.io/ios/app/halliday-g2/id6771237314)

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

**In-app purchases:** none


## Frequently asked questions

### Is GasUnits free?

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

### Is Halliday G2 free?

Halliday G2 is free to download, with no in-app purchases.

### Do GasUnits or Halliday G2 have ads?

Neither GasUnits nor Halliday G2 shows ads.

### Which is updated more often, GasUnits or Halliday G2?

GasUnits ships an update every 10 days, and Halliday G2 every 4 days. Most recently, GasUnits was updated on October 7, 2026 and Halliday G2 on October 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.*