# HVAC Pipe Sizer Plus vs AC Calculator

The clearest difference is price: AC Calculator at Free against HVAC Pipe Sizer Plus's $13.99. AC Calculator also leads on rating (4.8 vs 3.0) and update cadence (every 4 months vs every 15 months). HVAC Pipe Sizer Plus's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.

AC Calculator is free to download; HVAC Pipe Sizer Plus costs $13.99 up front. AC Calculator sells 2 one-off in-app purchases. HVAC Pipe Sizer Plus asks for nothing beyond the download.

AC Calculator holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: AC Calculator has 20 ratings behind it against 1, so its average is the more settled of the two.

HVAC Pipe Sizer Plus ships an update every 15 months, AC Calculator every 4 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | HVAC Pipe Sizer Plus | AC Calculator |
| --- | --- | --- |
| Price | $13.99 | **Free** |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/hvac-pipe-sizer-plus/id352069594/reviews) | **[4.8 (20 ratings)](https://appshunter.io/ios/app/ac-calculator-hvac-sizing/id1537174761/reviews)** |
| Number of ratings | 1 | **20** |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 4 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 9 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [Melchisedec Martinez Rodriguez](https://appshunter.io/developer/1534398511) |

## 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


### AC Calculator

[App page](https://appshunter.io/ios/app/ac-calculator-hvac-sizing/id1537174761)

This utility app simplifies HVAC sizing by calculating BTU/h capacity and recommending equipment. It offers unit conversions, price estimates, and energy consumption comparisons. Advanced features can be unlocked via in-app purchases.

**Highlights:** Calculate BTU/h capacity, Recommend equipment types, Convert BTU, kW, Kcal, Tons, Check price estimates, Compare inverter vs. conventional

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock View details | $4.99 | one-time |
| Unlock Advanced mode | $9.99 | one-time |


## Frequently asked questions

### Is HVAC Pipe Sizer Plus free?

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

### Is AC Calculator free?

AC Calculator is free to download, with in-app purchases available.

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

AC Calculator is rated higher. HVAC Pipe Sizer Plus averages 3.0 out of 5 from 1 ratings, while AC Calculator averages 4.8 from 20 ratings.

### Do HVAC Pipe Sizer Plus or AC Calculator have ads?

Neither HVAC Pipe Sizer Plus nor AC Calculator shows ads.

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

HVAC Pipe Sizer Plus ships an update every 15 months, and AC Calculator every 4 months. Most recently, HVAC Pipe Sizer Plus was updated on November 1, 2026 and AC Calculator on November 3, 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.*