# Fire Pump Calc vs First Due Unify

Fire Pump Calc and First Due Unify are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | Fire Pump Calc | First Due Unify |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (4 ratings)](https://appshunter.io/ios/app/fire-pump-calc/id6739542307/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Monetization | Free | — |
| Size | 6 MB | 118 MB |
| Requires iOS | 15.6 | **15.5** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Justin Medeiros](https://appshunter.io/developer/1782040504) | [Locality Media, Inc.](https://appshunter.io/developer/1355085433) |

## What reviewers say

### Fire Pump Calc

[App page](https://appshunter.io/ios/app/fire-pump-calc/id6739542307)

This professional hydraulic calculator assists fire service professionals and students with complex calculations for pump operations. It accurately determines pump discharge pressure, friction loss, elevation changes, and appliance pressure loss, all designed for real-world fireground scenarios. The app works offline and requires no account for immediate use.

**Highlights:** Pump Discharge Pressure (PDP) calculation, Friction loss for any hose lay, Elevation gain and loss calculation, Appliance pressure loss, Nozzle pressure calculation, Offline functionality, No account required

**Features:** macOS Compatibility

**In-app purchases:** none


### First Due Unify

[App page](https://appshunter.io/ios/app/first-due-unify/id6794475987)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fire Pump Calc free?

Fire Pump Calc is free to download, with no in-app purchases.

### Is First Due Unify free?

First Due Unify is free to download, with no in-app purchases.

### Do Fire Pump Calc or First Due Unify have ads?

Neither Fire Pump Calc nor First Due Unify 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.*