# Diesel CO2 vs TracPipe UK Sizing & Reference

The clearest difference is ads: Diesel CO2 at none against TracPipe UK Sizing & Reference's shown. TracPipe UK Sizing & Reference's advantage is iOS requirement (11.0 vs 15.6). On price, update cadence, 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.

Diesel CO2 ships an update every 10 months, TracPipe UK Sizing & Reference every 19 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Diesel CO2 | TracPipe UK Sizing & Reference |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 10 months** | Every 19 months |
| Monetization | — | Ad-supported |
| Size | 2 MB | 4 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Addison Mai](https://appshunter.io/developer/391450820) | [Omega Flex, Inc.](https://appshunter.io/developer/996885332) |

## What reviewers say

### Diesel CO2

[App page](https://appshunter.io/ios/app/diesel-co2/id471325738)

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

**In-app purchases:** none


### TracPipe UK Sizing & Reference

[App page](https://appshunter.io/ios/app/tracpipe-uk-sizing-and-reference/id1075847160)

Calculate the correct size of flexible gas piping for your project. Select gas type, pressure, and pipe length to determine capacity. Access the latest installation specifications and FAQs.

**Highlights:** Flexible gas piping sizing calculator, Capacity calculation based on gas type, pressure, and length, Access to TracPipe® Design and Installation Specification, Frequently asked questions section, Direct contact with TracPipe®, Automatically updated specifications via Wi-Fi

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Diesel CO2 free?

Diesel CO2 is free to download, with no in-app purchases.

### Is TracPipe UK Sizing & Reference free?

TracPipe UK Sizing & Reference is free to download, with no in-app purchases.

### Do Diesel CO2 or TracPipe UK Sizing & Reference have ads?

TracPipe UK Sizing & Reference shows ads; Diesel CO2 does not.

### Which is updated more often, Diesel CO2 or TracPipe UK Sizing & Reference?

Diesel CO2 ships an update every 10 months, and TracPipe UK Sizing & Reference every 19 months. Most recently, Diesel CO2 was updated on November 1, 2026 and TracPipe UK Sizing & Reference on November 2, 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.*