Compare Flow vs Open Channel Flow Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Compare Flow
This application helps engineers and designers evaluate the hydraulic flow capacity of various non-pressure sewer pipe types. It allows for comparisons between different pipe geometries and materials, including concrete, thermoplastic, and metal options.
- Manning's Formula calculation
- Compare hydraulic flow capacity
- Evaluate pipe geometry alternatives
- Compare pipe material options
- Supports concrete, thermoplastic, and metal pipes
- Circular, elliptical, arch, and box sections
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Compare Flow app uses Manning's Formula, the most widely accepted formula for evaluating the hydraulic capacity of non-pressure sewers. In order to evaluate possible alternatives in either pipe geometry or material, use this app to compare the hydraulic flow capacity among various concrete pipes including circular, elliptical, arch and box sections with circular thermoplastic and corrugated metal pipes.
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
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Transform complex hydraulic calculations into simple, accurate, and professional results with Open Channel Flow Pro - the comprehensive hydraulic engineering calculator designed for civil engineers, students, and professionals working with open channel hydraulics. Key Calculations: - Basic Hydraulic Parameters - Wetted perimeter, area, hydraulic radius - Flow Characteristics - Velocity, Froude number, hydraulic depth - Critical Flow Analysis - Critical depth, velocity, and slope - Rating Curves - Discharge vs. water depth relationships
Screenshots
Verdict
The clearest difference is price: Compare Flow at Free against Open Channel Flow Pro's $2.99. Compare Flow also leads on rating (4.6 vs 2.0). Open Channel Flow Pro's advantage is update cadence (every 2 months vs every 32 months). On ratings volume, 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
Compare Flow 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.
Compare Flow holds the better App Store score, 4.6 against 2.0. Both are backed by a comparable volume of ratings — 5 and 2 respectively.
Compare Flow ships an update every 32 months, Open Channel Flow Pro every 2 months. The most recent releases landed on September 17, 2026 and September 13, 2026 respectively.
| Parameter | Compare Flow | Open Channel Flow Pro |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 4.6 (5 ratings) — better | 2.0 (2 ratings) |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 5 — better | 2 |
| Update frequency | Every 32 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 14.0 — better |
| Further details — not scored | ||
| Size | 23 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | iENGINEERING Corporation | Alexius Academia |
Customer experience
Compare Flow
Open Channel Flow Pro
In-app purchases
Compare Flow
No in-app purchases
Open Channel Flow Pro
No in-app purchases
Questions
Is Compare Flow free?
Is Open Channel Flow Pro free?
Which has better reviews, Compare Flow or Open Channel Flow Pro?
Do Compare Flow or Open Channel Flow Pro have ads?
Which is updated more often, Compare Flow or Open Channel Flow Pro?
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