# FieldCalc Pro vs Engineering Calculator HVAC

The clearest difference is in-app purchases: Engineering Calculator HVAC at none against FieldCalc Pro's 2. Engineering Calculator HVAC also leads on iOS requirement (15.0 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. FieldCalc Pro sells 2 in-app purchases, starting at $4.99 per month. Engineering Calculator HVAC asks for nothing beyond the download.

## The numbers

| Metric | FieldCalc Pro | Engineering Calculator HVAC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 6 months |
| Size | 2 MB | 19 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Troy Bearden](https://appshunter.io/developer/1863167432) | [aleksandr bronnikov](https://appshunter.io/developer/1885003900) |

## What reviewers say

### FieldCalc Pro

[App page](https://appshunter.io/ios/app/fieldcalc-pro/id6758321103)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FieldCalc Pro Monthly | $4.99 | per month |
| FieldCalc Pro Yearly | $49.99 | per year |


### Engineering Calculator HVAC

[App page](https://appshunter.io/ios/app/engineering-calculator-hvac/id6760564633)

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

**In-app purchases:** none


## Frequently asked questions

### Is FieldCalc Pro free?

FieldCalc Pro is free to download, with in-app purchases available.

### Is Engineering Calculator HVAC free?

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

### Do FieldCalc Pro or Engineering Calculator HVAC have ads?

Neither FieldCalc Pro nor Engineering Calculator HVAC shows ads.

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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.*