# Compare Flow vs Hydraulic System Calculator

The clearest difference is review sentiment: Compare Flow at 50% against Hydraulic System Calculator's 0%. Compare Flow also leads on rating (4.6 vs 4.0). Hydraulic System Calculator's advantage is update cadence (every 7 months vs every 32 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Compare Flow holds the better App Store score, 4.6 against 4.0. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews point the same way: 50% of Compare Flow's written reviews are positive against 0% of Hydraulic System Calculator's.

Compare Flow ships an update every 32 months, Hydraulic System Calculator every 7 months. The most recent releases landed on September 17, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Compare Flow | Hydraulic System Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (5 ratings)](https://appshunter.io/ios/app/compare-flow/id581217854/reviews)** | [4.0 (3 ratings)](https://appshunter.io/ios/app/hydraulic-system-calculator/id826281445/reviews) |
| Number of ratings | **5** | 3 |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 32 months | **Every 7 months** |
| Monetization | Free | Free |
| Size | 23 MB | 94 MB |
| Requires iOS | 15.1 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [iENGINEERING Corporation](https://appshunter.io/developer/419618955) | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) |

## What reviewers say

### Compare Flow

[App page](https://appshunter.io/ios/app/compare-flow/id581217854)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### Hydraulic System Calculator

[App page](https://appshunter.io/ios/app/hydraulic-system-calculator/id826281445)

Calculate key parameters for hydraulic cylinders, pumps, motors, and pipes. Design individual components, view formulas, and switch between metric and imperial units for precise engineering.

**Highlights:** Calculate cylinder, pump, and motor parameters, Design single/double-acting cylinders, View and switch units (Metric/Imperial), Calculate piping parameters, Dynamic result updates, Copy and share results

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Compare Flow free?

Compare Flow is free to download, with no in-app purchases.

### Is Hydraulic System Calculator free?

Hydraulic System Calculator is free to download, with no in-app purchases.

### Which has better reviews, Compare Flow or Hydraulic System Calculator?

Compare Flow is rated higher. Compare Flow averages 4.6 out of 5 from 5 ratings, while Hydraulic System Calculator averages 4.0 from 3 ratings.

### Do Compare Flow or Hydraulic System Calculator have ads?

Neither Compare Flow nor Hydraulic System Calculator shows ads.

### Which is updated more often, Compare Flow or Hydraulic System Calculator?

Compare Flow ships an update every 32 months, and Hydraulic System Calculator every 7 months. Most recently, Compare Flow was updated on September 17, 2026 and Hydraulic System Calculator on September 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*