# Education Is KEY vs Reverse Flow

The clearest difference is rating: Reverse Flow at 5.0 against Education Is KEY's 4.0. Reverse Flow also leads on update cadence (weekly vs every 5 months) and device support (3 vs 1). Education Is KEY's advantage is in-app purchases (none vs 4). On price, ratings volume, ads and monetization model there is nothing between them.

Both are free to download. Reverse Flow sells 4 in-app purchases, starting at $2.99 per month. Education Is KEY asks for nothing beyond the download.

Reverse Flow holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 3 and 5 respectively.

Education Is KEY ships an update every 5 months, Reverse Flow weekly. The most recent releases landed on October 10, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Education Is KEY | Reverse Flow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (3 ratings)](https://appshunter.io/ios/app/education-is-key/id6744249929/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/reverse-flow-fire-hydraulics/id6775030535/reviews)** |
| Number of ratings | 3 | **5** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | Free | Free |
| Size | 63 MB | 8 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [KFH Industries, INC](https://appshunter.io/developer/1806664179) | [DEREK ANDREW MURDOCK](https://appshunter.io/developer/6775030537) |

## What reviewers say

### Education Is KEY

[App page](https://appshunter.io/ios/app/education-is-key/id6744249929)

This tool provides firefighters with essential hose data and calculations, including friction loss, GPM, and nozzle pressure. It also serves as a product catalog for hose specifications and helps locate local product experts.

**Highlights:** Friction loss calculator, GPM and nozzle pressure reference, Key Hose product catalog, Local product expert finder, Fire service interface

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Education Is KEY free?

Education Is KEY is free to download, with no in-app purchases.

### Is Reverse Flow free?

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

### Which has better reviews, Education Is KEY or Reverse Flow?

Reverse Flow is rated higher. Education Is KEY averages 4.0 out of 5 from 3 ratings, while Reverse Flow averages 5.0 from 5 ratings.

### Do Education Is KEY or Reverse Flow have ads?

Neither Education Is KEY nor Reverse Flow shows ads.

### Which is updated more often, Education Is KEY or Reverse Flow?

Education Is KEY ships an update every 5 months, and Reverse Flow weekly. Most recently, Education Is KEY was updated on October 10, 2026 and Reverse Flow on October 24, 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.*