Compare Flow vs Hydraulic Power Unit
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.
Hydraulic Power Unit
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The Hydraulic Power Unit Calculator can be used to determine the electrical power required for specific flow and pressure parameters. User can enter values for pump efficiency, oil flow and hydraulic pressure. Calculations will be made to determine required motor power. The user can then select or enter custom power source specifications (Voltage, Single/3 Phase, Power Factor, Motor Efficiency) to determine the amperage draw required. Reservoir design page includes calculations for tank size, oil volume and heat dissipation. Values are entered in either metric or imperial units. Results are shown for both metric and imperial. There is also a Speed - Torque - Power calculator. Enter any two variables and have the third calculated. Unit conversions are built into the calculation page.
Screenshots
Verdict
The clearest difference is iOS requirement: Hydraulic Power Unit at 6.0 against Compare Flow's 15.1. On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Compare Flow ships an update every 32 months, Hydraulic Power Unit every 37 months. The most recent releases landed on September 17, 2026 and December 9, 2025 respectively.
| Parameter | Compare Flow | Hydraulic Power Unit |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (5 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 32 months — better | Every 37 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 6.0 — better |
| Further details — not scored | ||
| Size | 23 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | iENGINEERING Corporation | Zanthic Automation Inc. |
In-app purchases
Compare Flow
No in-app purchases
Hydraulic Power Unit
No in-app purchases
Questions
Is Compare Flow free?
Is Hydraulic Power Unit free?
Do Compare Flow or Hydraulic Power Unit have ads?
Which is updated more often, Compare Flow or Hydraulic Power Unit?
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