# Gas Pipe Sizing Calculator vs Backdraft Control

The clearest difference is review sentiment: Backdraft Control at 100% against Gas Pipe Sizing Calculator's 13%. Backdraft Control also leads on price (Free vs $1.99) and rating (5.0 vs 4.0). Gas Pipe Sizing Calculator's advantage is chart position (#184 vs unranked) and iOS requirement (12.0 vs 16.1). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

Backdraft Control is free to download; Gas Pipe Sizing Calculator costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Backdraft Control holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews point the same way: 13% of Gas Pipe Sizing Calculator's written reviews are positive against 100% of Backdraft Control's.

Gas Pipe Sizing Calculator ships an update every 13 months, Backdraft Control every 9 months. The most recent releases landed on October 2, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Gas Pipe Sizing Calculator | Backdraft Control |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/gas-pipe-sizing-calculator/id596009129/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/backdraft-control/id6504692991/reviews)** |
| Number of ratings | **4** | 2 |
| Positive reviews | 13.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 9 months** |
| Monetization | Paid | **Free** |
| Best chart rank | **#184** | — |
| Size | 0 MB | 43 MB |
| Requires iOS | **12.0** | 16.1 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Connor Kelley](https://appshunter.io/developer/596009132) | [Ben Pauza](https://appshunter.io/developer/1611207130) |

## What reviewers say

### Gas Pipe Sizing Calculator

[App page](https://appshunter.io/ios/app/gas-pipe-sizing-calculator/id596009129)

**Currently charting:** #184 Top Paid · Utilities (US App Store)

This utility app simplifies gas pipe sizing by performing calculations based on BTU load, run length, and gas type. It eliminates the need for manual chart and codebook referencing, providing the minimum required pipe size quickly.

**Highlights:** Calculates minimum gas pipe size, Input BTU load, Input longest run length, Select gas type (LP or Natural), Designed for low pressure (0.5psi)

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

**In-app purchases:** none


### Backdraft Control

[App page](https://appshunter.io/ios/app/backdraft-control/id6504692991)

This application provides comprehensive control over your Catalyst Wireless FCU, allowing you to fine-tune settings like dwell, delay, and fire modes. It enables firmware updates and system monitoring directly from your mobile device, offering professional-grade customization for airsoft enthusiasts.

**Highlights:** Configure dwell, delay, and fire modes, Adjust advanced parameters, Save and load custom presets, Monitor system behavior, Update FCU firmware, Intuitive user interface

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

**In-app purchases:** none


## Frequently asked questions

### Is Gas Pipe Sizing Calculator free?

Gas Pipe Sizing Calculator costs $1.99, with no in-app purchases.

### Is Backdraft Control free?

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

### Which has better reviews, Gas Pipe Sizing Calculator or Backdraft Control?

Backdraft Control is rated higher. Gas Pipe Sizing Calculator averages 4.0 out of 5 from 4 ratings, while Backdraft Control averages 5.0 from 2 ratings.

### Do Gas Pipe Sizing Calculator or Backdraft Control have ads?

Neither Gas Pipe Sizing Calculator nor Backdraft Control shows ads.

### Which is updated more often, Gas Pipe Sizing Calculator or Backdraft Control?

Gas Pipe Sizing Calculator ships an update every 13 months, and Backdraft Control every 9 months. Most recently, Gas Pipe Sizing Calculator was updated on October 2, 2026 and Backdraft Control on October 12, 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.*