# Installer App vs HVAC Formulas Tech Calculator

The clearest difference is rating: HVAC Formulas Tech Calculator at 3.7 against Installer App's 3.0. HVAC Formulas Tech Calculator also leads on update cadence (every 4 days vs every 5 weeks). Installer App's advantage is review sentiment (50% vs 33%). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

HVAC Formulas Tech Calculator holds the better App Store score, 3.7 against 3.0. Both are backed by a comparable volume of ratings — 7 and 13 respectively. Written reviews complicate that: 50% of Installer App's written reviews are positive against 33% of HVAC Formulas Tech Calculator's, so the app with the better star average is not the one people write more warmly about.

Installer App ships an update every 5 weeks, HVAC Formulas Tech Calculator every 4 days. The most recent releases landed on September 1, 2026 and July 7, 2026 respectively.

## The numbers

| Metric | Installer App | HVAC Formulas Tech Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (7 ratings)](https://appshunter.io/ios/app/installer-app/id423984641/reviews) | **[3.7 (13 ratings)](https://appshunter.io/ios/app/hvac-formulas-tech-calculator/id1551053530/reviews)** |
| Number of ratings | 7 | **13** |
| Positive reviews | **50.0% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 4 days** |
| Monetization | Free | Free |
| Size | 90 MB | 1 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [Sergio Bost](https://appshunter.io/developer/1550113896) |

## What reviewers say

### Installer App

[App page](https://appshunter.io/ios/app/installer-app/id423984641)

This app provides HVAC professionals with a digital toolbox for everyday tasks. It offers product information, installation guides, and advanced features to streamline work, including project management and hydronic balancing tools.

**Highlights:** Radiator Presetting, Product Finder, My Projects (Cloud-based), Hydronic Balancing, Flow/Pressure Calculator, Floor Heating Tools, Burner Converter, Magnetic Tool

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

**In-app purchases:** none


### HVAC Formulas Tech Calculator

[App page](https://appshunter.io/ios/app/hvac-formulas-tech-calculator/id1551053530)

This app provides a comprehensive collection of HVAC formulas for technicians. It simplifies complex calculations for heating, ventilation, and air conditioning systems, saving time and effort compared to manual methods or general calculators. Designed by an industry professional, it offers an easy-to-use interface for quick access to essential formulas.

**Highlights:** Comprehensive HVAC formula collection, Formulas for air, fan laws, and heat, Simplified calculations for technicians, Easy-to-use interface, Designed by an HVAC technician, Saves time searching the web

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Installer App free?

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

### Is HVAC Formulas Tech Calculator free?

HVAC Formulas Tech Calculator is free to download, with no in-app purchases.

### Which has better reviews, Installer App or HVAC Formulas Tech Calculator?

HVAC Formulas Tech Calculator is rated higher. Installer App averages 3.0 out of 5 from 7 ratings, while HVAC Formulas Tech Calculator averages 3.7 from 13 ratings.

### Do Installer App or HVAC Formulas Tech Calculator have ads?

Neither Installer App nor HVAC Formulas Tech Calculator shows ads.

### Which is updated more often, Installer App or HVAC Formulas Tech Calculator?

Installer App ships an update every 5 weeks, and HVAC Formulas Tech Calculator every 4 days. Most recently, Installer App was updated on September 1, 2026 and HVAC Formulas Tech Calculator on July 7, 2026.

---

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