# Duct Calculator Elite vs SM Offset

The clearest difference is price: SM Offset at Free against Duct Calculator Elite's $9.99. SM Offset also leads on update cadence (fortnightly vs every 15 months) and rating (5.0 vs 4.8). Duct Calculator Elite's advantage is ads (none vs shown) and ratings volume (234 vs 1). On in-app purchases, device support and iOS requirement there is nothing between them.

SM Offset is free to download; Duct Calculator Elite costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SM Offset holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Duct Calculator Elite has 234 ratings behind it against 1, so its average is the more settled of the two.

Duct Calculator Elite ships an update every 15 months, SM Offset fortnightly. The most recent releases landed on October 23, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Duct Calculator Elite | SM Offset |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [4.8 (234 ratings)](https://appshunter.io/ios/app/duct-calculator-elite/id665701601/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sm-offset/id6781870096/reviews)** |
| Number of ratings | **234** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 15 months | **Fortnightly** |
| Monetization | Paid | **Ad-supported** |
| Best chart rank | **#156** | — |
| Size | 13 MB | 6 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cyberprodigy LLC](https://appshunter.io/developer/510284906) | [Bradley Evans](https://appshunter.io/developer/6781870098) |

## What reviewers say

### Duct Calculator Elite

[App page](https://appshunter.io/ios/app/duct-calculator-elite/id665701601)

**Currently charting:** #156 Top Paid · Utilities (US App Store)

This app simplifies HVAC duct sizing calculations. It computes duct size, velocity, pressure drop, and flow rate with an intuitive interface. Supports various units and duct materials for precise HVAC design.

**Highlights:** Calculate duct size, velocity, pressure drop, flow rate, Duct Size by Airflow mode, Duct Size by Dimension mode, Pressure Drop calculations, Customizable units and duct materials, Uses ASHRAE Handbook friction loss equations

**Features:** macOS Compatibility

**In-app purchases:** none


### SM Offset

[App page](https://appshunter.io/ios/app/sm-offset/id6781870096)

This utility app provides precise offset calculations for sheet metal workers, HVAC fabricators, and pipefitters. It offers real tape-measure fractions for cut lengths, arc lengths, and elbow centerlines, working entirely offline for jobsite reliability.

**Highlights:** Two-elbow offset calculations, Rolling offset calculations, Duct fitting offsets, Custom angle support, Results in real fractions, 100% offline functionality

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

**In-app purchases:** none


## Frequently asked questions

### Is Duct Calculator Elite free?

Duct Calculator Elite costs $9.99, with no in-app purchases.

### Is SM Offset free?

SM Offset is free to download, with no in-app purchases.

### Which has better reviews, Duct Calculator Elite or SM Offset?

SM Offset is rated higher. Duct Calculator Elite averages 4.8 out of 5 from 234 ratings, while SM Offset averages 5.0 from 1 ratings.

### Do Duct Calculator Elite or SM Offset have ads?

SM Offset shows ads; Duct Calculator Elite does not.

### Which is updated more often, Duct Calculator Elite or SM Offset?

Duct Calculator Elite ships an update every 15 months, and SM Offset fortnightly. Most recently, Duct Calculator Elite was updated on October 23, 2026 and SM Offset on October 5, 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.*