# Gas vs Pipe Diameter Calculators

The clearest difference is update cadence: Gas at every 6 months against Pipe Diameter Calculators's every 20 months. Gas also leads on iOS requirement (13.4 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Gas sells 1 one-off in-app purchase and Pipe Diameter Calculators sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Gas ships an update every 6 months, Pipe Diameter Calculators every 20 months. The most recent releases landed on November 7, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Gas | Pipe Diameter Calculators |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 20 months |
| Size | 10 MB | 59 MB |
| Requires iOS | **13.4** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Iurii Dubrov](https://appshunter.io/developer/1632057221) | [Ashvin Kevadiya](https://appshunter.io/developer/1756324971) |

## What reviewers say

### Gas

[App page](https://appshunter.io/ios/app/gas-main/id1522466692)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get full App version | $7.99 | one-time |


### Pipe Diameter Calculators

[App page](https://appshunter.io/ios/app/pipe-diameter-calculators/id6743020859)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is Gas free?

Gas is free to download, with in-app purchases available.

### Is Pipe Diameter Calculators free?

Pipe Diameter Calculators is free to download, with in-app purchases available.

### Do Gas or Pipe Diameter Calculators have ads?

Neither Gas nor Pipe Diameter Calculators shows ads.

### Which is updated more often, Gas or Pipe Diameter Calculators?

Gas ships an update every 6 months, and Pipe Diameter Calculators every 20 months. Most recently, Gas was updated on November 7, 2026 and Pipe Diameter Calculators on November 8, 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.*