# Rada AP1 vs IN HVAC Calculator

The clearest difference is device support: IN HVAC Calculator at 3 against Rada AP1's 1. IN HVAC Calculator also leads on iOS requirement (12.0 vs 15.6). On price, update cadence, 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.

Rada AP1 ships an update every 7 months, IN HVAC Calculator every 6 months. The most recent releases landed on October 8, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Rada AP1 | IN HVAC Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.1 (10 ratings)](https://appshunter.io/ios/app/in-hvac-calculator/id1219008229/reviews)** |
| Number of ratings | — | **10** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 6 months** |
| Monetization | — | Free |
| Size | 11 MB | 27 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kohler Mira Ltd.](https://appshunter.io/developer/1107602815) | [Gregory Enterprises](https://appshunter.io/developer/1157657878) |

## What reviewers say

### Rada AP1

[App page](https://appshunter.io/ios/app/rada-ap1/id1107602816)

**Features:** macOS Compatibility

**In-app purchases:** none


### IN HVAC Calculator

[App page](https://appshunter.io/ios/app/in-hvac-calculator/id1219008229)

This app provides HVAC inspection tools and guidelines for home inspectors. It helps estimate equipment age, size, and requirements, giving inspectors confidence in their reports.

**Highlights:** Equipment circuit requirements calculator, AC tonnage estimation by model number, HVAC manufacture date lookup, Combustion air requirements guide, General HVAC reference information

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Rada AP1 free?

Rada AP1 is free to download, with no in-app purchases.

### Is IN HVAC Calculator free?

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

### Do Rada AP1 or IN HVAC Calculator have ads?

Neither Rada AP1 nor IN HVAC Calculator shows ads.

### Which is updated more often, Rada AP1 or IN HVAC Calculator?

Rada AP1 ships an update every 7 months, and IN HVAC Calculator every 6 months. Most recently, Rada AP1 was updated on October 8, 2026 and IN HVAC Calculator on October 24, 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.*