# Flow Test Calculator vs Station Boss V2

The clearest difference is rating: Station Boss V2 at 5.0 against Flow Test Calculator's 4.1. Station Boss V2 also leads on in-app purchases (none vs 4) and update cadence (every 5 days vs every 90 months). Flow Test Calculator's advantage is ratings volume (63 vs 2). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Flow Test Calculator sells 4 one-off in-app purchases. Station Boss V2 asks for nothing beyond the download.

Station Boss V2 holds the better App Store score, 5.0 against 4.1. 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. Written reviews point the same way: 69% of Flow Test Calculator's written reviews are positive against 80% of Station Boss V2's.

Flow Test Calculator ships an update every 90 months, Station Boss V2 every 5 days. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Flow Test Calculator | Station Boss V2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (63 ratings)](https://appshunter.io/ios/app/flow-test-calculator/id853530759/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/station-boss-v2/id6737058034/reviews)** |
| Number of ratings | **63** | 2 |
| Positive reviews | 68.8% of reviews | **80.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 90 months | **Every 5 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 2 MB | 193 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Larry Owens](https://appshunter.io/developer/496138296) | [STATION BOSS, LLC](https://appshunter.io/developer/1632754565) |

## 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 |


### Station Boss V2

[App page](https://appshunter.io/ios/app/station-boss-v2/id6737058034)

This comprehensive platform streamlines operations and record-keeping for fire, EMS, and law enforcement agencies. It provides fast access to dispatch tools, incident records, personnel management, scheduling, and reporting for responders and administrators.

**Highlights:** Dispatch response tools, Incident records management, Personnel and apparatus tracking, Scheduling and training logs, Operational reporting, Live incident details with GPS routing, Role-based access control

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

**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 Station Boss V2 free?

Station Boss V2 is free to download, with no in-app purchases.

### Which has better reviews, Flow Test Calculator or Station Boss V2?

Station Boss V2 is rated higher. Flow Test Calculator averages 4.1 out of 5 from 63 ratings, while Station Boss V2 averages 5.0 from 2 ratings.

### Do Flow Test Calculator or Station Boss V2 have ads?

Neither Flow Test Calculator nor Station Boss V2 shows ads.

### Which is updated more often, Flow Test Calculator or Station Boss V2?

Flow Test Calculator ships an update every 90 months, and Station Boss V2 every 5 days. Most recently, Flow Test Calculator was updated on November 6, 2026 and Station Boss V2 on November 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.*