# Fire Pump Operator vs Reverse Flow

The clearest difference is monetization model: Reverse Flow at free against Fire Pump Operator's paid. Fire Pump Operator's advantage is update cadence (every 2 days vs weekly) and iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Fire Pump Operator sells 2 in-app purchases, starting at $1.99 per month and Reverse Flow sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Fire Pump Operator ships an update every 2 days, Reverse Flow weekly. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Fire Pump Operator | Reverse Flow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/reverse-flow-fire-hydraulics/id6775030535/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Weekly |
| Monetization | Paid | **Free** |
| Size | 48 MB | 8 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Digital Training Systems Incorporated](https://appshunter.io/developer/320642446) | [DEREK ANDREW MURDOCK](https://appshunter.io/developer/6775030537) |

## What reviewers say

### Fire Pump Operator

[App page](https://appshunter.io/ios/app/fire-pump-operator/id1044180312)

This app assists fire pump operators in calculating engine pressure using a standard formula. It allows for the addition of multiple friction losses, appliances, and elevations, and offers the ability to save and modify entries. Users can also adjust default coefficients and access other relevant calculators.

**Highlights:** Engine Pressure calculation, Add friction losses, appliances, elevations, Save and modify entries, Adjust IFSTA coefficients, Head Pressure calculator, NFA Formula calculator

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fire Pump Operator Pro | $1.99 | per month |
| Fire Pump Operator Pro | $19.99 | per year |


### Reverse Flow

[App page](https://appshunter.io/ios/app/reverse-flow-fire-hydraulics/id6775030535)

This professional fireground hydraulics platform assists firefighters and pump operators in calculating complex flow rates, pump discharge pressures, and relay pumping requirements. It supports various nozzle types and allows for custom hose coefficients and elevation adjustments for accurate operational planning and decision support.

**Highlights:** Reverse Flow calculations, Required PDP calculations, Relay Pumping calculations, Split Lay analysis, Pump Chart storage, Nozzle support, Custom hose coefficients

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reverse Flow Monthly Support $3 | $2.99 | per month |
| Reverse Flow Monthly Support $10 | $9.99 | per month |
| Reverse Flow One-Time Support $5 | $4.99 | one-time |
| Reverse Flow Pro | $4.99 | one-time |


## Frequently asked questions

### Is Fire Pump Operator free?

Fire Pump Operator is free to download, with in-app purchases available.

### Is Reverse Flow free?

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

### Do Fire Pump Operator or Reverse Flow have ads?

Neither Fire Pump Operator nor Reverse Flow shows ads.

### Which is updated more often, Fire Pump Operator or Reverse Flow?

Fire Pump Operator ships an update every 2 days, and Reverse Flow weekly. Most recently, Fire Pump Operator was updated on October 7, 2026 and Reverse Flow on October 1, 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.*