# Duct Calculator S&P — user reviews

> 2 indexed App Store user reviews of Duct Calculator S&P by S&P SISTEMAS DE VENTILACION SL., rated 5.00/5 from 1 ratings.

- Source: https://appshunter.io/ios/app/duct-calculator-s-and-p/id1096043356/reviews
- App overview in markdown: https://appshunter.io/ios/app/duct-calculator-s-and-p/id1096043356.md
- Rating breakdown: 5★ 1 · 4★ 0 · 3★ 0 · 2★ 0 · 1★ 0

## Most critical reviews (2 lowest-rated)

### 1/5 — Why is it only metric!?!?!

*2016-06-23*

The app seems to work well but in the U.S. we use standard measurements not metric. I'm not sure why the app was designed without an option to switch!

### 3/5 — Cross sectional area gives wrong conversion

*2021-01-18*

Hi, app works well and is easy to use and smooth but the calculation for circular to rectangular duct is wrong. If I put 400 diameter in circular, it returnees 400x400 duct equivalent. I’m sure you can see this is not correct. This brings the other calculations in doubt too unfortunately

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*