# Flow Test Calculator vs FireWorks Response App Lite

The clearest difference is in-app purchases: FireWorks Response App Lite at none against Flow Test Calculator's 4. FireWorks Response App Lite also leads on update cadence (every 3 weeks vs every 90 months). Flow Test Calculator's advantage is ratings volume (63 vs 2). On price, rating, ads and device support there is nothing between them.

Both are free to download. Flow Test Calculator sells 4 one-off in-app purchases. FireWorks Response App Lite asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.1 for Flow Test Calculator against 4.0 for FireWorks Response App Lite. That said, the two scores are not equally well evidenced: Flow Test Calculator has 63 ratings behind it against 2, so its average is the more settled of the two.

Flow Test Calculator ships an update every 90 months, FireWorks Response App Lite every 3 weeks. The most recent releases landed on September 18, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Flow Test Calculator | FireWorks Response App Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (63 ratings)](https://appshunter.io/ios/app/flow-test-calculator/id853530759/reviews)** | [4.0 (2 ratings)](https://appshunter.io/ios/app/fireworks-response-app-lite/id6738320899/reviews) |
| Number of ratings | **63** | 2 |
| Positive reviews | 68.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 90 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 2 MB | 70 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Larry Owens](https://appshunter.io/developer/496138296) | [Eprsys](https://appshunter.io/developer/1691723675) |

## What reviewers say

### Flow Test Calculator

[App page](https://appshunter.io/ios/app/flow-test-calculator/id853530759)

Calculate hydrant flow rates and determine maximum water system flow. This tool uses a standard variation of the Hazen-Williams formula for calculations. Imperial units are currently supported, with metric coming soon.

**Highlights:** Hydrant flow rate calculation, Maximum water system flow determination, Hazen-Williams formula implementation, Imperial unit support, Future metric unit support

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Disable Purchase Requests | $0.99 | one-time |
| Disable Purchase Requests 1.99 | $1.99 | one-time |
| Disable Purchase Request 4.99 | $4.99 | one-time |
| Disable Purchase Requests 9.99 | $9.99 | one-time |


### FireWorks Response App Lite

[App page](https://appshunter.io/ios/app/fireworks-response-app-lite/id6738320899)

This app helps fire departments and EMS manage incidents, coordinate teams, and document patient care. It offers real-time alerts, mapping, and offline capabilities for efficient emergency response.

**Highlights:** Real-time alerts and dispatch messages, Mapping and navigation to incident locations, Incident status updates, ePCR documentation, Offline operation with data synchronization, Driver's license scanning for patient info

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flow Test Calculator free?

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

### Is FireWorks Response App Lite free?

FireWorks Response App Lite is free to download, with no in-app purchases.

### Which has better reviews, Flow Test Calculator or FireWorks Response App Lite?

Flow Test Calculator is rated higher. Flow Test Calculator averages 4.1 out of 5 from 63 ratings, while FireWorks Response App Lite averages 4.0 from 2 ratings.

### Do Flow Test Calculator or FireWorks Response App Lite have ads?

Neither Flow Test Calculator nor FireWorks Response App Lite shows ads.

### Which is updated more often, Flow Test Calculator or FireWorks Response App Lite?

Flow Test Calculator ships an update every 90 months, and FireWorks Response App Lite every 3 weeks. Most recently, Flow Test Calculator was updated on September 18, 2026 and FireWorks Response App Lite on October 4, 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.*