# Hydraulic System Calculator vs docustry

The clearest difference is update cadence: docustry at weekly against Hydraulic System Calculator's every 7 months. docustry also leads on iOS requirement (11.0 vs 14.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Hydraulic System Calculator ships an update every 7 months, docustry weekly. The most recent releases landed on September 24, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Hydraulic System Calculator | docustry |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/hydraulic-system-calculator/id826281445/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Weekly** |
| Monetization | Free | — |
| Size | 94 MB | 24 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [endless webservices GmbH](https://appshunter.io/developer/1709291113) |

## What reviewers say

### 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


### docustry

[App page](https://appshunter.io/ios/app/docustry/id6473211663)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Hydraulic System Calculator free?

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

### Is docustry free?

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

### Do Hydraulic System Calculator or docustry have ads?

Neither Hydraulic System Calculator nor docustry shows ads.

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

Hydraulic System Calculator ships an update every 7 months, and docustry weekly. Most recently, Hydraulic System Calculator was updated on September 24, 2026 and docustry on September 8, 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.*