# HVAC Pipe Sizer Plus vs HVAC AI

The clearest difference is price: HVAC AI at Free against HVAC Pipe Sizer Plus's $13.99. HVAC AI also leads on iOS requirement (15.0 vs 17.0). HVAC Pipe Sizer Plus's advantage is rating (3.0 vs 1.0) and in-app purchases (none vs 4). On ratings volume, update cadence, ads and device support there is nothing between them.

HVAC AI is free to download; HVAC Pipe Sizer Plus costs $13.99 up front. HVAC AI sells 4 in-app purchases, starting at $5.69 per 7 days. HVAC Pipe Sizer Plus asks for nothing beyond the download.

HVAC Pipe Sizer Plus holds the better App Store score, 3.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

HVAC Pipe Sizer Plus ships an update every 15 months, HVAC AI every 12 months. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | HVAC Pipe Sizer Plus | HVAC AI |
| --- | --- | --- |
| Price | $13.99 | **Free** |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/hvac-pipe-sizer-plus/id352069594/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/hvac-ai-tools-and-simulator/id6747603414/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 12 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 390 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | +4 | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [RODRIGO DIAZ](https://appshunter.io/developer/1575990541) |

## What reviewers say

### HVAC Pipe Sizer Plus

[App page](https://appshunter.io/ios/app/hvac-pipe-sizer-plus/id352069594)

This utility app combines three specialized pipe sizing tools for HVAC systems: liquid, steam, and gas. It offers flexible input options, unit conversions, and an equipment locator for comprehensive HVAC design.

**Highlights:** Liquid pipe sizing, Steam pipe sizing with steam table calculator, Gas pipe sizing (low and high pressure), HVAC Equipment Locator, Slider controls for input adjustments, English and Metric unit display

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

**In-app purchases:** none


### HVAC AI

[App page](https://appshunter.io/ios/app/hvac-ai-tools-and-simulator/id6747603414)

This app provides HVAC technicians with AI-powered diagnostic tools, a refrigerant slider, calculators, and a simulator. It helps diagnose faults, calculate values, and create professional quotes, all from a mobile device.

**Highlights:** AI-powered fault diagnosis, Digital refrigerant PT chart, Superheat and subcooling calculators, Interactive HVAC simulator, Gamified learning path, Professional quote builder, AI technical support

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Offer | $5.69 | per 7 days |
| Weekly | $5.69 | per 7 days |
| Annual Offer | $46.49 | per year |
| Annual Subscription | $57.90 | per year |


## Frequently asked questions

### Is HVAC Pipe Sizer Plus free?

HVAC Pipe Sizer Plus costs $13.99, with no in-app purchases.

### Is HVAC AI free?

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

### Which has better reviews, HVAC Pipe Sizer Plus or HVAC AI?

HVAC Pipe Sizer Plus is rated higher. HVAC Pipe Sizer Plus averages 3.0 out of 5 from 1 ratings, while HVAC AI averages 1.0 from 2 ratings.

### Do HVAC Pipe Sizer Plus or HVAC AI have ads?

Neither HVAC Pipe Sizer Plus nor HVAC AI shows ads.

### Which is updated more often, HVAC Pipe Sizer Plus or HVAC AI?

HVAC Pipe Sizer Plus ships an update every 15 months, and HVAC AI every 12 months. Most recently, HVAC Pipe Sizer Plus was updated on October 27, 2026 and HVAC AI on October 28, 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.*