# Flow Test Calculator vs HiperGIS

The clearest difference is rating: HiperGIS at 5.0 against Flow Test Calculator's 4.1. HiperGIS also leads on in-app purchases (none vs 4) and update cadence (every 14 months vs every 90 months). Flow Test Calculator's advantage is ratings volume (63 vs 3). 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. HiperGIS asks for nothing beyond the download.

HiperGIS 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 3, so its average is the more settled of the two.

Flow Test Calculator ships an update every 90 months, HiperGIS every 14 months. The most recent releases landed on October 23, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Flow Test Calculator | HiperGIS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (63 ratings)](https://appshunter.io/ios/app/flow-test-calculator/id853530759/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/hipergis/id1542145606/reviews)** |
| Number of ratings | **63** | 3 |
| Positive reviews | 68.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 90 months | **Every 14 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 2 MB | 132 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Larry Owens](https://appshunter.io/developer/496138296) | [gWorks](https://appshunter.io/developer/1442677976) |

## 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 |


### HiperGIS

[App page](https://appshunter.io/ios/app/hipergis/id1542145606)

This app allows field workers to efficiently capture infrastructure data, log inspections, and issue maintenance work orders. It supports viewing GIS layers, asset maintenance history, and creating requests for supervisor approval. Designed for ease of use by all technical levels.

**Highlights:** View GIS layers by user group, Log inspections and issue work orders, Track asset maintenance history, Add attachments to records, Create supervisor approval requests, Toggle GIS layers for viewing

**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 HiperGIS free?

HiperGIS is free to download, with no in-app purchases.

### Which has better reviews, Flow Test Calculator or HiperGIS?

HiperGIS is rated higher. Flow Test Calculator averages 4.1 out of 5 from 63 ratings, while HiperGIS averages 5.0 from 3 ratings.

### Do Flow Test Calculator or HiperGIS have ads?

Neither Flow Test Calculator nor HiperGIS shows ads.

### Which is updated more often, Flow Test Calculator or HiperGIS?

Flow Test Calculator ships an update every 90 months, and HiperGIS every 14 months. Most recently, Flow Test Calculator was updated on October 23, 2026 and HiperGIS on October 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*