# Open Channel Flow Pro vs UGC Toolbox

The clearest difference is price: UGC Toolbox at Free against Open Channel Flow Pro's $2.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

UGC Toolbox is free to download; Open Channel Flow Pro costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Open Channel Flow Pro ships an update every 2 months, UGC Toolbox every 3 months. The most recent releases landed on September 13, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Open Channel Flow Pro | UGC Toolbox |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[2.0 (2 ratings)](https://appshunter.io/ios/app/open-channel-flow-pro/id1576457515/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Paid | — |
| Size | 2 MB | 20 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alexius Academia](https://appshunter.io/developer/1209840214) | [Master Builders Solutions Deutschland GmbH](https://appshunter.io/developer/1521874754) |

## What reviewers say

### Open Channel Flow Pro

[App page](https://appshunter.io/ios/app/open-channel-flow-pro/id1576457515)

This hydraulic engineering calculator simplifies complex open channel flow calculations for professionals and students. It provides accurate results for basic parameters, flow characteristics, critical flow analysis, and rating curves.

**Highlights:** Basic Hydraulic Parameters, Flow Characteristics, Critical Flow Analysis, Rating Curves, Wetted Perimeter, Area, Hydraulic Radius, Velocity, Froude Number, Hydraulic Depth

**Features:** macOS Compatibility

**In-app purchases:** none


### UGC Toolbox

[App page](https://appshunter.io/ios/app/ugc-toolbox/id6514305399)

**In-app purchases:** none


## Frequently asked questions

### Is Open Channel Flow Pro free?

Open Channel Flow Pro costs $2.99, with no in-app purchases.

### Is UGC Toolbox free?

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

### Do Open Channel Flow Pro or UGC Toolbox have ads?

Neither Open Channel Flow Pro nor UGC Toolbox shows ads.

### Which is updated more often, Open Channel Flow Pro or UGC Toolbox?

Open Channel Flow Pro ships an update every 2 months, and UGC Toolbox every 3 months. Most recently, Open Channel Flow Pro was updated on September 13, 2026 and UGC Toolbox on September 9, 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.*