# Installer App vs Allday HVAC Calc

The clearest difference is rating: Allday HVAC Calc at 5.0 against Installer App's 3.0. Installer App's advantage is in-app purchases (none vs 1) and update cadence (every 5 weeks vs every 3 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Allday HVAC Calc sells 1 one-off in-app purchase. Installer App asks for nothing beyond the download.

Allday HVAC Calc holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: Installer App has 7 ratings behind it against 1, so its average is the more settled of the two.

Installer App ships an update every 5 weeks, Allday HVAC Calc every 3 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Installer App | Allday HVAC Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (7 ratings)](https://appshunter.io/ios/app/installer-app/id423984641/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/allday-hvac-calc/id6446276144/reviews)** |
| Number of ratings | **7** | 1 |
| Positive reviews | 53.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | Free | Free |
| Size | 90 MB | 38 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [Dmitrii Pankov](https://appshunter.io/developer/1677093604) |

## 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


### Allday HVAC Calc

[App page](https://appshunter.io/ios/app/allday-hvac-calc/id6446276144)

This app offers three specialized modules for HVAC engineers: a psychrometric calculator for air properties, a pipe calculator for fluid dynamics and selection, and a duct calculator for air speed and pressure loss. It provides detailed calculations and reference formulas in both SI and IP units.

**Highlights:** Psychrometric air property calculations, Pipe velocity and pressure loss calculation, Duct speed and pressure loss calculation, Interdependent parameter calculations, Reference formulas included, SI and IP unit support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Allday Design Assist | $4.99 | one-time |


## Frequently asked questions

### Is Installer App free?

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

### Is Allday HVAC Calc free?

Allday HVAC Calc is free to download, with in-app purchases available.

### Which has better reviews, Installer App or Allday HVAC Calc?

Allday HVAC Calc is rated higher. Installer App averages 3.0 out of 5 from 7 ratings, while Allday HVAC Calc averages 5.0 from 1 ratings.

### Do Installer App or Allday HVAC Calc have ads?

Neither Installer App nor Allday HVAC Calc shows ads.

### Which is updated more often, Installer App or Allday HVAC Calc?

Installer App ships an update every 5 weeks, and Allday HVAC Calc every 3 months. Most recently, Installer App was updated on November 1, 2026 and Allday HVAC Calc on November 3, 2026.

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