# Open Channel Flow Pro vs FlowAnalyzer Viewer

The clearest difference is price: FlowAnalyzer Viewer 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.

FlowAnalyzer Viewer 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 3 months, FlowAnalyzer Viewer every 2 months. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Open Channel Flow Pro | FlowAnalyzer Viewer |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[1.7 (3 ratings)](https://appshunter.io/ios/app/open-channel-flow-pro/id1576457515/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 2 MB | 1 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alexius Academia](https://appshunter.io/developer/1209840214) | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) |

## 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, Vision Pro support

**In-app purchases:** none


### FlowAnalyzer Viewer

[App page](https://appshunter.io/ios/app/flowanalyzer-viewer/id6754879365)

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

**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 FlowAnalyzer Viewer free?

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

### Do Open Channel Flow Pro or FlowAnalyzer Viewer have ads?

Neither Open Channel Flow Pro nor FlowAnalyzer Viewer shows ads.

### Which is updated more often, Open Channel Flow Pro or FlowAnalyzer Viewer?

Open Channel Flow Pro ships an update every 3 months, and FlowAnalyzer Viewer every 2 months. Most recently, Open Channel Flow Pro was updated on November 7, 2026 and FlowAnalyzer Viewer on October 30, 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.*