Comparison

Hydraulic vs Thread Calculator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Hydraulic

Perform essential hydraulic calculations for cylinders, pumps, and fluid lines. Solve for forces, speeds, torque, power, and pressure drop. Supports metric and imperial units, with advanced features unlocked via in-app purchase.

Highlights
  • Cylinder force and speed calculations
  • Pump displacement, flow, and pressure calculations
  • Hydraulic line fluid velocity and pressure drop
  • Orifice flow and pressure calculations
  • Speed, torque, and power calculations
  • Metric and imperial unit support
  • Copy results to clipboard
Features
Read full description

The Hydraulic Calculator includes many basic hydraulic calculations. Cylinder calculations can be done to solve for extension / retraction forces or speeds. Pump calculations can also be done by entering combinations of displacement, oil flow and pressure to determine values for speed, torque and power. Both mechanical and volumetric efficiencies can be used in these calculations. Hydraulic line calculations can also be done for fluid velocity, cross sectional area, Reynolds number and pressure drop. The free version is limited to 1” or 25mm line diameters. Orifice calculations can also be made using three parameters: Oil Flow, Orifice Diameter and Pressure Drop. Enter any two values and have the third calculated. Speed - Torque - Power page: Enter any two values have the third calculated. Unit conversions built into the page. Calculations can be done in either metric or imperial units. Basic unit conversions are also available. With the in-app purchase, all features from the Hydraulic Calculator will become active: Cylinder characteristics can be entered in a number of different ways. Enter hydraulic flow, cylinder velocity, or stroke time and calculate the other two. User can also enter Hydraulic pressure, extend force or retract force and have the other two calculated. One application for this is to measure the stroke time of a cylinder. By entering this with the bore diameter and stroke length, the system flow is calculated. Full motor & pump calculation page. The motor & pump calculator are flexible tools in which the user can enter any three known values to have the remaining values calculated. Values include: displacement, oil flow, pressure, rotational speed, torque, and motor power. Both mechanical and volumetric efficiency values are used. Results can be copied to the clipboard in a text format for use in e-mails, messages, or other documentation.

About

Thread Calculator

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
Read full description

The app includes: - A calculator for thread cutting for the following units: M, MF, UNC, UNEF, UNF, UNR, UNS, NPT, NPTF, NPSC, NPSF, NPSL, NPSM, BA, BSP, BSF, BSW, BSPP, TR, and TRF - A calculator for cold forming - A calculator for thread repair You want to know which tap hole you should drill for threading or which bolt you should use? With this app, you will find the desired measures in no time: Simply select the desired thread type, nominal size, and pitch and you will get the matching diameter for your project. This saves precious time you would have spent tediously searching for internal and external thread dimensions in tables. As this app is still in its development phase, new features will follow soon, so stay tuned! GSR Gustav Stursberg GmbH is a manufacturer for high-quality thread cutting tools with 130 years of operational experience in the area of threading tool production. The product portfolio includes a wide selection of tools for different areas of application. GSR taps, twist drills, round dies, and tool holders are manufactured to the highest quality standards in our own production facilities. The constant quality control during the production process guarantees a consistent good quality in all national as well as international production facilities. This requires enormous precision, which is reflected by our tools. Precision is in the details. Since 1889.

Screenshots

Hydraulic4 screens
Thread Calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: Thread Calculator at none against Hydraulic's 2. Thread Calculator also leads on rating (4.4 vs 4.1). Hydraulic's advantage is ads (none vs shown) and update cadence (every 6 weeks vs every 18 months). On price, ratings volume, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Hydraulic sells 2 one-off in-app purchases. Thread Calculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Thread Calculator holds the better App Store score, 4.4 against 4.1. Both are backed by a comparable volume of ratings — 17 and 14 respectively. Written reviews complicate that: 50% of Hydraulic's written reviews are positive against 33% of Thread Calculator's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Hydraulic ships an update every 6 weeks, Thread Calculator every 18 months. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 4 level
Hydraulic versus Thread Calculator: the parameters behind the verdict, then further details
ParameterHydraulicThread Calculator
PriceFreeFree
Rating4.1 (17 ratings)4.4 (14 ratings) — better
Positive reviews50.0% of reviews — better33.3% of reviews
Number of ratings17 — better14
Update frequencyEvery 6 weeks — betterEvery 18 months
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size24 MB25 MB
Age rating4+4+
DeveloperZanthic Automation Inc.GSR Gustav Stursberg GmbH

Customer experience

Hydraulic

All ratings16 ratings
Positive81.3%
Neutral12.5%
Negative6.3%
Written reviews8 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Thread Calculator

All ratings13 ratings
Positive84.6%
Neutral7.7%
Negative7.7%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

2 purchases

Hydraulic

One-time2
  • Full Version$7.99
  • Pro Version$7.99
None

Thread Calculator

No in-app purchases

Questions

Is Hydraulic free?
Hydraulic is free to download, with in-app purchases available.
Is Thread Calculator free?
Thread Calculator is free to download, with no in-app purchases.
Which has better reviews, Hydraulic or Thread Calculator?
Thread Calculator is rated higher. Hydraulic averages 4.1 out of 5 from 17 ratings, while Thread Calculator averages 4.4 from 14 ratings.
Do Hydraulic or Thread Calculator have ads?
Thread Calculator shows ads; Hydraulic does not.
Which is updated more often, Hydraulic or Thread Calculator?
Hydraulic ships an update every 6 weeks, and Thread Calculator every 18 months. Most recently, Hydraulic was updated on October 20, 2026 and Thread Calculator on October 24, 2026.

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