# HVAC Duct Sizer vs Hivision Smart

The clearest difference is price: Hivision Smart at Free against HVAC Duct Sizer's $4.99. Hivision Smart also leads on rating (5.0 vs 3.1) and in-app purchases (none vs 1). HVAC Duct Sizer's advantage is update cadence (every 3 months vs every 25 months) and ratings volume (9 vs 3). On ads and device support there is nothing between them.

Hivision Smart is free to download; HVAC Duct Sizer costs $4.99 up front. HVAC Duct Sizer sells 1 one-off in-app purchase. Hivision Smart asks for nothing beyond the download.

Hivision Smart holds the better App Store score, 5.0 against 3.1. Both are backed by a comparable volume of ratings — 9 and 3 respectively.

HVAC Duct Sizer ships an update every 3 months, Hivision Smart every 25 months. The most recent releases landed on October 31, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | HVAC Duct Sizer | Hivision Smart |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [3.1 (9 ratings)](https://appshunter.io/ios/app/hvac-duct-sizer/id317970395/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/hivision-smart/id1595083682/reviews)** |
| Number of ratings | **9** | 3 |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 25 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 1 MB | 200 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | +4 | 12+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [Shenzhen Haoxing Technology Co., Ltd](https://appshunter.io/developer/1595083684) |

## What reviewers say

### HVAC Duct Sizer

[App page](https://appshunter.io/ios/app/hvac-duct-sizer/id317970395)

This app provides quick and simple HVAC duct sizing analysis. It allows users to calculate duct dimensions based on airflow or existing dimensions, and can also determine a range of duct sizes. Results can be emailed for further analysis.

**Highlights:** Duct sizing by airflow, Duct sizing by dimensions, Range of duct sizes calculation, Rectangular, round, and oval duct shapes, English and Metric unit options, Email results with CSV attachment, HVAC Equipment Locator

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HVAC Equipment Locator | $9.99 | one-time |


### Hivision Smart

[App page](https://appshunter.io/ios/app/hivision-smart/id1595083682)

Control and monitor smart security devices remotely. View equipment status in real-time and share access with others. Offers cloud storage for recorded data.

**Highlights:** Remote control of devices, Real-time equipment status, One-click sharing, Cloud storage

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HVAC Duct Sizer free?

HVAC Duct Sizer costs $4.99, and also offers in-app purchases.

### Is Hivision Smart free?

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

### Which has better reviews, HVAC Duct Sizer or Hivision Smart?

Hivision Smart is rated higher. HVAC Duct Sizer averages 3.1 out of 5 from 9 ratings, while Hivision Smart averages 5.0 from 3 ratings.

### Do HVAC Duct Sizer or Hivision Smart have ads?

Neither HVAC Duct Sizer nor Hivision Smart shows ads.

### Which is updated more often, HVAC Duct Sizer or Hivision Smart?

HVAC Duct Sizer ships an update every 3 months, and Hivision Smart every 25 months. Most recently, HVAC Duct Sizer was updated on October 31, 2026 and Hivision Smart 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.*