# Ductulator - Duct Calculator — user reviews

> 3 indexed App Store user reviews of Ductulator by Mikhail Nikitin, rated 4.59/5 from 32 ratings.

- Source: https://appshunter.io/ios/app/ductulator-duct-calculator/id6757307937/reviews
- App overview in markdown: https://appshunter.io/ios/app/ductulator-duct-calculator/id6757307937.md
- Rating breakdown: 5★ 26 · 4★ 3 · 3★ 1 · 2★ 0 · 1★ 2

## Most critical reviews (3 lowest-rated)

### 1/5 — Another deceptive application

*2026-03-19*

Stay away from it. Nothing in the description suggests that any charges. However when you get it installed, you are hit with the highest subscription fees. They tell you that you can use it for 7 days for free but want you to sign up right away and lock any calculation results if you don’t. Say it upfront. Don’t lie.

**Developer response:** Thank you for your feedback. Our pricing is clearly displayed before any purchase is made — you are never charged without seeing the cost first. The 7-day free trial allows you to explore the app with no commitment. We're sorry the app wasn't the right fit for you, but we do not hide any fees.

### 5/5 — Pro grade ductulator

*2026-04-12*

Been in the HVAC trade 18 years and this app is an absolute game-changer. Quick CFM-to-duct sizing, round-to-rectangular conversions on the fly, friction loss, all right there on my phone. Saves me time on every job, especially on commercial takeoffs.

### 5/5 — Duct Calculator

*2026-01-30*

easy app to read duct sizing

**Developer response:** Thank you for your positive feedback! It means a lot to us. We designed the app to be as simple and practical as possible for everyday use. We hope it continues to serve you well on the job!

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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 2026-09-03.*