# HVAC Formulas Tech Calculator — user reviews

> 3 indexed App Store user reviews of HVAC Formulas Tech Calculator by Sergio Bost, rated 3.69/5 from 13 ratings.

- Source: https://appshunter.io/ios/app/hvac-formulas-tech-calculator/id1551053530/reviews
- App overview in markdown: https://appshunter.io/ios/app/hvac-formulas-tech-calculator/id1551053530.md
- Rating breakdown: 5★ 8 · 4★ 1 · 3★ 0 · 2★ 0 · 1★ 4

## Most critical reviews (3 lowest-rated)

### 1/5 — Enter button obscured

*2024-06-11*

Keyboard stays in the way of clicking “ENTER” button in fan laws.

### 1/5 — RipOff

*2022-11-09*

6 bucks for this? What a joke . Where is the 3rd fan law?

**Developer response:** Hi, I built this as a sole developer in my free time. You bring up a valid point. So let's make this app free.

### 5/5 — Simple, intuitive app for HVAC professionals

*2023-02-07*

The UI is clean and gets straight to the point. Other apps have a clunky UI and I have to spend time navigating around unnecessarily. This app has easily become part of my daily workflow.

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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 2026-07-07.*