# TracPipe System Guide vs Calkins LP Gas

The clearest difference is iOS requirement: Calkins LP Gas at 12.2 against TracPipe System Guide's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

TracPipe System Guide ships an update every 9 months, Calkins LP Gas every 6 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | TracPipe System Guide | Calkins LP Gas |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (9 ratings)](https://appshunter.io/ios/app/tracpipe-system-guide/id996885333/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 months** |
| Monetization | Ad-supported | — |
| Size | 33 MB | 56 MB |
| Requires iOS | 15.1 | **12.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Omega Flex, Inc.](https://appshunter.io/developer/996885332) | [Rural Computer Consultants, Inc.](https://appshunter.io/developer/640795441) |

## What reviewers say

### TracPipe System Guide

[App page](https://appshunter.io/ios/app/tracpipe-system-guide/id996885333)

This application helps users calculate the correct size of flexible gas piping for installations. It supports various sizing methods and gas types, providing accurate results based on selected parameters. Users can also access updated design guides and installation instructions.

**Highlights:** Flexible gas piping sizing calculator, Supports Longest Run or Branch length methods, Calculates capacity based on gas type, pressure, and pressure drop, Easy-to-use calculator wheel, Access to updated Design Guide and Installation Instructions, Find a Sales Representative feature

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

**In-app purchases:** none


### Calkins LP Gas

[App page](https://appshunter.io/ios/app/calkins-lp-gas/id6479916674)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TracPipe System Guide free?

TracPipe System Guide is free to download, with no in-app purchases.

### Is Calkins LP Gas free?

Calkins LP Gas is free to download, with no in-app purchases.

### Do TracPipe System Guide or Calkins LP Gas have ads?

Neither TracPipe System Guide nor Calkins LP Gas shows ads.

### Which is updated more often, TracPipe System Guide or Calkins LP Gas?

TracPipe System Guide ships an update every 9 months, and Calkins LP Gas every 6 months. Most recently, TracPipe System Guide was updated on November 1, 2026 and Calkins LP Gas 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.*