# HVAC Motor Solutions vs Duct Sizer Calc HVAC

The clearest difference is price: HVAC Motor Solutions at Free against Duct Sizer Calc HVAC's $0.99. HVAC Motor Solutions also leads on in-app purchases (none vs 1). Duct Sizer Calc HVAC's advantage is chart position (#184 vs unranked). On update cadence, ads, device support and iOS requirement there is nothing between them.

HVAC Motor Solutions is free to download; Duct Sizer Calc HVAC costs $0.99 up front. Duct Sizer Calc HVAC sells 1 one-off in-app purchase. HVAC Motor Solutions asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | HVAC Motor Solutions | Duct Sizer Calc HVAC |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/hvac-motor-solutions/id6702011210/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free | — |
| Best chart rank | — | **#184** |
| Size | 141 MB | 34 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Regal Rexnord Corporation](https://appshunter.io/developer/571732561) | [Rizvan Adzhoian](https://appshunter.io/developer/1891746079) |

## What reviewers say

### HVAC Motor Solutions

[App page](https://appshunter.io/ios/app/hvac-motor-solutions/id6702011210)

This app provides HVAC technicians with tools and resources for motor replacement. It includes a cross-reference finder, a 'where to buy' function, and a motor selector. Training materials like video tutorials and installation guides are also available.

**Highlights:** Cross-reference replacement finder, Where to buy function, Motor selector tool, Video installation tutorials, Written installation guides, In-person training scheduling

**Features:** macOS Compatibility

**In-app purchases:** none


### Duct Sizer Calc HVAC

[App page](https://appshunter.io/ios/app/duct-sizer-calc-hvac/id6764646921)

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

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Unlock | $2.99 | one-time |


## Frequently asked questions

### Is HVAC Motor Solutions free?

HVAC Motor Solutions is free to download, with no in-app purchases.

### Is Duct Sizer Calc HVAC free?

Duct Sizer Calc HVAC costs $0.99, and also offers in-app purchases.

### Do HVAC Motor Solutions or Duct Sizer Calc HVAC have ads?

Neither HVAC Motor Solutions nor Duct Sizer Calc HVAC shows ads.

### Which is updated more often, HVAC Motor Solutions or Duct Sizer Calc HVAC?

HVAC Motor Solutions ships an update every 3 weeks, and Duct Sizer Calc HVAC every 3 weeks. Most recently, HVAC Motor Solutions was updated on October 24, 2026 and Duct Sizer Calc HVAC 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.*