# Hydraulic System Calculator vs Thread Calculator

The clearest difference is ads: Hydraulic System Calculator at none against Thread Calculator's shown. Hydraulic System Calculator also leads on update cadence (every 7 months vs every 18 months) and monetization model (free vs ad-supported). Thread Calculator's advantage is review sentiment (33% vs 0%) and rating (4.3 vs 4.0). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Thread Calculator holds the better App Store score, 4.3 against 4.0. Both are backed by a comparable volume of ratings — 3 and 13 respectively. Written reviews point the same way: 0% of Hydraulic System Calculator's written reviews are positive against 33% of Thread Calculator's.

Hydraulic System Calculator ships an update every 7 months, Thread Calculator every 18 months. The most recent releases landed on September 24, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Hydraulic System Calculator | Thread Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (3 ratings)](https://appshunter.io/ios/app/hydraulic-system-calculator/id826281445/reviews) | **[4.3 (13 ratings)](https://appshunter.io/ios/app/thread-calculator/id1559560290/reviews)** |
| Number of ratings | 3 | **13** |
| Positive reviews | 0.0% of reviews | **33.3% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 7 months** | Every 18 months |
| Monetization | **Free** | Ad-supported |
| Size | 94 MB | 25 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) | [GSR Gustav Stursberg GmbH](https://appshunter.io/developer/1559560292) |

## 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


### Thread Calculator

[App page](https://appshunter.io/ios/app/thread-calculator/id1559560290)

This app provides a quick and easy way to calculate thread dimensions for various units, including tap hole sizes and bolt specifications. It helps metalworkers find precise measurements for internal and external threads without consulting tables.

**Highlights:** Thread cutting calculator for multiple units, Cold forming calculator, Thread repair calculator, Tap hole and bolt diameter calculation, Saves time compared to tables

**Features:** macOS Compatibility

**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 Thread Calculator free?

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

### Which has better reviews, Hydraulic System Calculator or Thread Calculator?

Thread Calculator is rated higher. Hydraulic System Calculator averages 4.0 out of 5 from 3 ratings, while Thread Calculator averages 4.3 from 13 ratings.

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

Thread Calculator shows ads; Hydraulic System Calculator does not.

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

Hydraulic System Calculator ships an update every 7 months, and Thread Calculator every 18 months. Most recently, Hydraulic System Calculator was updated on September 24, 2026 and Thread Calculator on September 9, 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.*