Open Channel Flow Pro
Open channel calculator
$2.99 · Designed for iPad. Not verified for macOS.
Uniform flow, critical flow, water surface profiles, hydraulic jumps and rating curves for six channel shapes, with charts and PDF reports. Metric and English units.
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.
Ratings & Reviews
Version 1.8 is the largest update yet.
New
• Water surface profiles: a Profile tab on every channel computes gradually varied flow from a control depth by the direct step method
• Specific energy, momentum and hydraulic jump in every result
• Triangular and parabolic channels
• Natural channels: solve for water elevation or bed slope, with separate overbank roughness
• Design aids: most efficient section, freeboard and shear stress
• A list of Manning's n values to choose from
• Metric or English units on every form; typed values convert
• PDF export and charts on every results screen
• Messages under each field when an input is not valid
Fixed
• Froude number and hydraulic depth for rectangular and circular channels
• Accuracy of depth solvers in English units
• Rating curves that mixed feet and metres
• Cross-section preview at zero or negative elevations
Now requires iOS 15 or later.
The developer, Alexius Academia, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Alexius Academia
- Size
- 2.2 MB
- Category
- Productivity
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Syncsoft Solutions
