Open Channel Flow Pro vs FlowAnalyzer Viewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Open Channel Flow Pro
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.
- Basic Hydraulic Parameters
- Flow Characteristics
- Critical Flow Analysis
- Rating Curves
- Wetted Perimeter, Area, Hydraulic Radius
- Velocity, Froude Number, Hydraulic Depth
Read full descriptionHide full description
Open Channel Flow Pro is a hydraulic calculator for open channels. It solves uniform and critical flow, draws the water surface profile, and reports energy, momentum and the hydraulic jump, for six channel shapes. It is made for civil and irrigation engineers, and for students of hydraulics. SIX CHANNEL SHAPES • Rectangular • Trapezoidal • Triangular • Circular • Parabolic • Natural: a cross-section you enter point by point, with separate overbank roughness WHAT IT CALCULATES • Uniform flow by Manning's equation: solve for discharge, depth, bed slope and more • Area, wetted perimeter, hydraulic radius, top width, velocity, Froude number and hydraulic depth • Critical depth, critical velocity and critical slope • Specific energy, momentum and the sequent depth of a hydraulic jump • Water surface profiles: gradually varied flow from a control depth by the direct step method • Rating curves of discharge against depth • Design aids: most efficient section, freeboard and shear stress MADE FOR REAL WORK • Metric or English units on every form; values you have typed convert • A list of Manning's n values to choose from • Charts on every results screen • PDF reports you can share or print • Worksheets that keep your calculations • Messages under each field when an input is not valid • Built-in documentation of the equations and terms • Works offline, on iPhone and iPad Disclaimer: results should be checked before they are used in design. Professional use is at the discretion of the user.
FlowAnalyzer Viewer
Read full descriptionHide full description
FlowAnalyzer Viewer opens water network models (.inp files) on your iPhone or iPad, runs a hydraulic simulation with the EPANET 2.2 engine, and lets you inspect the results element by element. WHAT YOU CAN DO • Open .inp files from Files, Mail, AirDrop or cloud storage • Run a hydraulic simulation and step through the time periods • See the network on an interactive map: zoom, pan, touch and hold any node to see its data • Read pressure, head, demand, flow, velocity and headloss for junctions, pipes, pumps, tanks, reservoirs and valves • Review hydraulic and time options • Works offline. Your files stay on your device EDIT IN FLOWANALYZER Tap "Edit & simulate in FlowAnalyzer" on the network screen to send the network to FlowAnalyzer (if installed) to edit it. If FlowAnalyzer is not installed, its App Store page opens inside the viewer. The two apps are separate. They use different EPANET engine versions (2.2 and 2.3.5); results may differ. FREE FlowAnalyzer Viewer is free, with no limit on network size. To edit and create networks, there is FlowAnalyzer. PRIVACY No account, no ads, no tracking. The app collects no data. FlowAnalyzer Viewer uses the EPANET 2.2 engine to read and simulate .inp files. It is an independent app, not affiliated with, endorsed by or sponsored by the U.S. Environmental Protection Agency (EPA).
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Open Channel Flow Pro | FlowAnalyzer Viewer |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 1.7 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 2 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Alexius Academia | Transparent Blue Water LLC |
In-app purchases
Open Channel Flow Pro
No in-app purchases
FlowAnalyzer Viewer
No in-app purchases
Questions
Is Open Channel Flow Pro free?
Is FlowAnalyzer Viewer free?
Do Open Channel Flow Pro or FlowAnalyzer Viewer have ads?
Which is updated more often, Open Channel Flow Pro or FlowAnalyzer Viewer?
Other comparisons















