# Gas Pipe Sizing Calculator vs Lennox Smart Tech

The clearest difference is price: Lennox Smart Tech at Free against Gas Pipe Sizing Calculator's $1.99. Lennox Smart Tech also leads on rating (4.5 vs 4.0) and update cadence (every 2 months vs every 13 months). Gas Pipe Sizing Calculator's advantage is review sentiment (13% vs 0%) and iOS requirement (12.0 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

Lennox Smart Tech 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.

Lennox Smart Tech holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: Lennox Smart Tech has 60 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 13% of Gas Pipe Sizing Calculator's written reviews are positive against 0% of Lennox Smart Tech's, so the app with the better star average is not the one people write more warmly about.

Gas Pipe Sizing Calculator ships an update every 13 months, Lennox Smart Tech every 2 months. The most recent releases landed on October 15, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Gas Pipe Sizing Calculator | Lennox Smart Tech |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/gas-pipe-sizing-calculator/id596009129/reviews) | **[4.5 (60 ratings)](https://appshunter.io/ios/app/lennox-smart-tech/id6443907644/reviews)** |
| Number of ratings | 4 | **60** |
| Positive reviews | **13.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 0 MB | 98 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Connor Kelley](https://appshunter.io/developer/596009132) | [Lennox Industries](https://appshunter.io/developer/355049651) |

## What reviewers say

### Gas Pipe Sizing Calculator

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

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


### Lennox Smart Tech

[App page](https://appshunter.io/ios/app/lennox-smart-tech/id6443907644)

Streamline the installation and servicing of compatible home comfort systems. This app allows for remote testing, diagnostics, and system setting adjustments directly from a smartphone, reducing the need to physically interact with equipment.

**Highlights:** Install and service home comfort systems, Test and run diagnostics remotely, Adjust system settings from smartphone, Compatible with Lennox S40/L40/M40/E40 Smart Thermostats, Direct smartphone control

**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 Lennox Smart Tech free?

Lennox Smart Tech is free to download, with no in-app purchases.

### Which has better reviews, Gas Pipe Sizing Calculator or Lennox Smart Tech?

Lennox Smart Tech is rated higher. Gas Pipe Sizing Calculator averages 4.0 out of 5 from 4 ratings, while Lennox Smart Tech averages 4.5 from 60 ratings.

### Do Gas Pipe Sizing Calculator or Lennox Smart Tech have ads?

Neither Gas Pipe Sizing Calculator nor Lennox Smart Tech shows ads.

### Which is updated more often, Gas Pipe Sizing Calculator or Lennox Smart Tech?

Gas Pipe Sizing Calculator ships an update every 13 months, and Lennox Smart Tech every 2 months. Most recently, Gas Pipe Sizing Calculator was updated on October 15, 2026 and Lennox Smart Tech on October 31, 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.*