# Engineering Calculator HVAC vs FireSprinkPro

The clearest difference is in-app purchases: Engineering Calculator HVAC at none against FireSprinkPro's 2. FireSprinkPro's advantage is update cadence (weekly vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. FireSprinkPro sells 2 in-app purchases, starting at $17.49 per month. Engineering Calculator HVAC asks for nothing beyond the download.

Engineering Calculator HVAC ships an update every 6 months, FireSprinkPro weekly. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Engineering Calculator HVAC | FireSprinkPro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Size | 19 MB | 21 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [aleksandr bronnikov](https://appshunter.io/developer/1885003900) | [Michael Fritz](https://appshunter.io/developer/6792256062) |

## What reviewers say

### Engineering Calculator HVAC

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

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

**In-app purchases:** none


### FireSprinkPro

[App page](https://appshunter.io/ios/app/firesprinkpro/id6792256060)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FireSprinkPro Monthly | $17.49 | per month |
| FireSprinkPro Lifetime License | $175.99 | one-time |


## Frequently asked questions

### Is Engineering Calculator HVAC free?

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

### Is FireSprinkPro free?

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

### Do Engineering Calculator HVAC or FireSprinkPro have ads?

Neither Engineering Calculator HVAC nor FireSprinkPro shows ads.

### Which is updated more often, Engineering Calculator HVAC or FireSprinkPro?

Engineering Calculator HVAC ships an update every 6 months, and FireSprinkPro weekly. Most recently, Engineering Calculator HVAC was updated on November 9, 2026 and FireSprinkPro on November 10, 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.*