# IN HVAC Calculator vs Generator Code Vault

The clearest difference is update cadence: Generator Code Vault at weekly against IN HVAC Calculator's every 6 months. IN HVAC Calculator's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

IN HVAC Calculator ships an update every 6 months, Generator Code Vault weekly. The most recent releases landed on September 22, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | IN HVAC Calculator | Generator Code Vault |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (11 ratings)](https://appshunter.io/ios/app/in-hvac-calculator/id1219008229/reviews)** | — |
| Number of ratings | **11** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | Free | — |
| Size | 27 MB | 13 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Gregory Enterprises](https://appshunter.io/developer/1157657878) | [gEncompass LLC](https://appshunter.io/developer/6802897051) |

## What reviewers say

### 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


### Generator Code Vault

[App page](https://appshunter.io/ios/app/generator-code-vault/id6802897049)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IN HVAC Calculator free?

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

### Is Generator Code Vault free?

Generator Code Vault is free to download, with no in-app purchases.

### Do IN HVAC Calculator or Generator Code Vault have ads?

Neither IN HVAC Calculator nor Generator Code Vault shows ads.

### Which is updated more often, IN HVAC Calculator or Generator Code Vault?

IN HVAC Calculator ships an update every 6 months, and Generator Code Vault weekly. Most recently, IN HVAC Calculator was updated on September 22, 2026 and Generator Code Vault on September 13, 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.*