Comparison

A vs Open Channel Flow Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

A

This app simplifies structural analysis for engineers and architects. It uses Direct Stiffness Analysis to calculate shear forces, bending moments, and deflections for beams, trusses, and frames. Get instant results and detailed reports for documentation and learning.

Highlights
  • Direct Stiffness Analysis
  • Beam, truss, and frame analysis
  • Shear force, bending moment, deflection calculations
  • User-friendly interface
  • Detailed analysis reports
  • Educational resource
Read full description

A-Projects: Structural Analysis Simplified Unlock the power of structural analysis with A-Projects, your ultimate companion for engineers and architecture enthusiasts! Whether you’re designing beams, trusses, or frames, our app utilizes Direct Stiffness Analysis to deliver accurate solutions for shear forces, bending moments, and deflections. Key Features: User-Friendly Interface: Intuitive navigation that allows you to easily input data and visualize results. Comprehensive Design Tools: Analyze various structures including beams, trusses, and frames with precision. Instant Results: Get quick calculations for shear forces, bending moments, and deflections at your fingertips. Detailed Reports: Generate in-depth analysis reports to help in documentation and presentations. Educational Resource: Ideal for students and professionals alike, enhancing learning and reinforcing concepts in structural engineering. Transform your approach to structural design with smart analysis tools that fit in your pocket. Download A-Projects today and step confidently into the world of structural engineering!

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.

Screenshots

A4 screens
Open Channel Flow Pro4 screens

Verdict

The call

The clearest difference is rating: A at 3.0 against Open Channel Flow Pro's 1.7. A also leads on update cadence (every 3 weeks vs every 3 months). Open Channel Flow Pro's advantage is price ($2.99 vs $8.99) and iOS requirement (15.0 vs 18.0). On ratings volume, ads, in-app purchases and monetization model 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

A costs $8.99 and Open Channel Flow Pro $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

A holds the better App Store score, 3.0 against 1.7. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

UpkeepUpdate frequency

A ships an update every 3 weeks, Open Channel Flow Pro every 3 months. The most recent releases landed on October 6, 2026 and October 17, 2026 respectively.

Scorecard4 real differences · 6 level
A versus Open Channel Flow Pro: the parameters behind the verdict, then further details
ParameterAOpen Channel Flow Pro
Price$8.99$2.99 — better
Rating3.0 (2 ratings) — better1.7 (3 ratings)
Positive reviews35.7% of reviews—
Number of ratings23 — better
Update frequencyEvery 3 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.015.0 — better
Further details — not scored
Size59 MB2 MB
Age rating4+4+
DeveloperJutarus RatanasethakulAlexius Academia

Customer experience

A

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews14 reviews
Positive35.7%
Neutral7.1%
Negative57.1%

Open Channel Flow Pro

All ratings2 ratings
Positive0.0%
Neutral50.0%
Negative50.0%

In-app purchases

None

A

No in-app purchases

None

Open Channel Flow Pro

No in-app purchases

Questions

Is A free?
A costs $8.99, with no in-app purchases.
Is Open Channel Flow Pro free?
Open Channel Flow Pro costs $2.99, with no in-app purchases.
Which has better reviews, A or Open Channel Flow Pro?
A is rated higher. A averages 3.0 out of 5 from 2 ratings, while Open Channel Flow Pro averages 1.7 from 3 ratings.
Do A or Open Channel Flow Pro have ads?
Neither A nor Open Channel Flow Pro shows ads.
Which is updated more often, A or Open Channel Flow Pro?
A ships an update every 3 weeks, and Open Channel Flow Pro every 3 months. Most recently, A was updated on October 6, 2026 and Open Channel Flow Pro on October 17, 2026.

Other comparisons