# Duct Calculator Elite vs Nanotech

The clearest difference is price: Nanotech at Free against Duct Calculator Elite's $9.99. Nanotech also leads on update cadence (every 2 months vs every 15 months) and rating (5.0 vs 4.8). Duct Calculator Elite's advantage is ratings volume (234 vs 1). On ads, in-app purchases and device support there is nothing between them.

Nanotech 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.

Nanotech 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, Nanotech every 2 months. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Duct Calculator Elite | Nanotech |
| --- | --- | --- |
| 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/nanotech/id6448310023/reviews)** |
| Number of ratings | **234** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 13 MB | 13 MB |
| Requires iOS | 15.6 | **12.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Cyberprodigy LLC](https://appshunter.io/developer/510284906) | [MH&W International Corporation](https://appshunter.io/developer/1684337989) |

## What reviewers say

### Duct Calculator Elite

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

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


### Nanotech

[App page](https://appshunter.io/ios/app/nanotech/id6448310023)

This tool helps select common mode cores to prevent motor bearing failures and protect electrical grids from VFD-generated noise. It also features a calculator for maximum allowable bearing current.

**Highlights:** Common mode core selector, Kit selection, Motor bearing failure prevention, VFD EMC noise protection, Maximum allowable bearing current calculator

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Duct Calculator Elite free?

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

### Is Nanotech free?

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

### Which has better reviews, Duct Calculator Elite or Nanotech?

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

### Do Duct Calculator Elite or Nanotech have ads?

Neither Duct Calculator Elite nor Nanotech shows ads.

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

Duct Calculator Elite ships an update every 15 months, and Nanotech every 2 months. Most recently, Duct Calculator Elite was updated on November 6, 2026 and Nanotech on November 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*