Comparison

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.

Head to head
About

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.

Highlights
  • Basic Hydraulic Parameters
  • Flow Characteristics
  • Critical Flow Analysis
  • Rating Curves
  • Wetted Perimeter, Area, Hydraulic Radius
  • Velocity, Froude Number, Hydraulic Depth
Features
Read 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.

About

FlowAnalyzer Viewer

Features
Read 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

Open Channel Flow Pro4 screens
FlowAnalyzer Viewer4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard1 real difference · 8 level
Open Channel Flow Pro versus FlowAnalyzer Viewer: the parameters behind the verdict, then further details
ParameterOpen Channel Flow ProFlowAnalyzer Viewer
Price$2.99Free — better
Rating1.7 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size2 MB1 MB
Age rating4+4+
DeveloperAlexius AcademiaTransparent Blue Water LLC

In-app purchases

None

Open Channel Flow Pro

No in-app purchases

None

FlowAnalyzer Viewer

No in-app purchases

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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