Comparison

EngineCalc vs Hydraulic Calculator Engineer

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

Head to head
About

EngineCalc

This utility app provides a collection of essential formulas and calculators for powersports and engine tuning. It allows users to perform complex calculations directly on their iPhone, eliminating the need for a laptop or desktop computer.

Highlights
  • Powersports formulas
  • Engine tuning calculators
  • Actual Volume Flow
  • Air Density
  • Compression Ratio
  • Cylinder Displacement
  • Volumetric Efficiency
Features
Currently charting
Read full description

EngineCalc is a collection of useful formulas (calculators) for those involved with powersports or engine tuning, in general. Instead of carrying around a laptop or relying on access to a desktop computer with a spreadsheet, you can get the calculations you need right on the handy iPhone in your pocket. Here is a partial list of the "calculators" provided here in EngineCalc: * Actual Volume Flow * Air Density * BHP Loss * Compression Height * Compression Ratio * Corrected BHP * Cylinder Displacement * Horsepower * Mass Flow * Piston Dome Volume * Piston Speed * Rod Length * Simple Horsepower * Theoretical Volume Flow * Torque * Volumetric Efficiency

About

Hydraulic Calculator Engineer

This app offers a suite of hydraulic calculations for technicians and engineers. It simplifies complex hydraulics by automatically computing results based on user-entered values, eliminating the need for manual formula application.

Highlights
  • Cylinder Calculation
  • Power Calculation
  • Pressure Difference
  • Piston Diameter
  • Speed Calculation
  • Lifting Time
  • Volume Flow
Features
Read full description

Hydraulic Engineer Calculators is a practical hydraulic engineering calculator and formula app for engineers, technicians, students, contractors, operators, and anyone working with fluid flow, pipes, pumps, pressure, open channels, hydraulic cylinders, or fluid mechanics. Quickly enter your values, select units, calculate an estimate, review result details, and check the formula used. Hydraulic calculators included: Flow & Pipe Calculators - Pipe Flow Velocity - Calculate fluid velocity from flow rate and pipe diameter - Flow Rate - Calculate volumetric flow from flow area and average velocity - Required Pipe Diameter - Estimate pipe diameter from design flow and velocity - Reynolds Number - Calculate Reynolds number for internal fluid flow Head Loss Calculators - Darcy-Weisbach Head Loss - Estimate pipe friction head loss - Hazen-Williams Head Loss - Estimate water pipe friction loss - Minor Loss - Calculate losses from fittings, valves, entrances, exits, and components Pressure & Head Calculators - Pressure to Head - Convert pressure to hydraulic head - Head to Pressure - Convert hydraulic head to pressure - Hydrostatic Pressure - Calculate pressure caused by fluid depth - Bernoulli Total Head - Calculate total hydraulic head Pump Calculators - Pump Power - Estimate hydraulic pump power from flow, head, and efficiency - Pump Head from Pressure - Calculate pump head from pressure difference - NPSH Available - Estimate Net Positive Suction Head Available Open Channel Flow Calculators - Manning Rectangular Channel - Estimate rectangular channel flow - Froude Number - Calculate the Froude number - Critical Depth - Estimate critical water depth - Orifice Flow - Calculate fluid discharge through an orifice Hydraulic System Calculators - Water Hammer Pressure - Estimate pressure rise from a rapid velocity change - Hydraulic Cylinder Force - Calculate cylinder force from pressure and piston area - Hydraulic Cylinder Speed - Calculate piston speed from flow rate and bore diameter Fluid Properties Calculator - Specific Gravity - Calculate specific gravity from fluid density Useful for: - Hydraulic engineering - Fluid mechanics - Pipe flow and pipe sizing - Water flow and pressure - Head loss and pipe friction - Pump systems and pump power - NPSH calculations - Open channel flow - Hydraulic cylinders - Water hammer - Irrigation, plumbing, water, and wastewater systems - Civil and mechanical engineering Supported units include: - m, mm, cm, ft, in - m², cm², mm², ft², in² - m³/s, m³/h, L/s, L/min, US gpm, ft³/s - Pa, kPa, MPa, bar, psi - m/s, ft/s - W, kW, hp Built-in formula guide Each calculator includes its formula, and the app links to a Hydraulic Engineer Guide with additional information about formulas, variables, units, calculation steps, practical uses, and important considerations. Selected calculators also include dynamic diagrams to help visualize values used in pipe, pressure, head, open channel, tank, and hydraulic cylinder calculations. Simple workflow: - Choose a calculator - Enter your known values - Select units - Tap Calculate - Review the result and details - Check the formula - Open the related guide for more information The built-in search makes it easy to find a specific hydraulic calculator by category or name. Important disclaimer These calculators provide preliminary hydraulic estimates only. Results are not a substitute for professional engineering judgment, certified calculations, manufacturer specifications, site-specific analysis, or applicable codes and standards. Always verify input values, units, fluid properties, pipe specifications, equipment limitations, safety factors, operating conditions, site conditions, and governing requirements before using a calculation for design, procurement, installation, testing, operation, maintenance, or any safety-critical application.

Screenshots

EngineCalc3 screens
Hydraulic Calculator Engineer4 screens

Verdict

The call

The clearest difference is review sentiment: EngineCalc at 60% against Hydraulic Calculator Engineer's 0%. EngineCalc also leads on update cadence (every 2 months vs every 22 months) and chart position (#184 vs unranked). Hydraulic Calculator Engineer's advantage is price (Free vs $0.99) and rating (4.3 vs 2.3). On ads, in-app purchases and device support 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

Hydraulic Calculator Engineer is free to download; EngineCalc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Hydraulic Calculator Engineer holds the better App Store score, 4.3 against 2.3. Both are backed by a comparable volume of ratings — 3 and 9 respectively. Written reviews complicate that: 60% of EngineCalc's written reviews are positive against 0% of Hydraulic Calculator Engineer's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

EngineCalc ships an update every 2 months, Hydraulic Calculator Engineer every 22 months. The most recent releases landed on August 14, 2026 and September 28, 2026 respectively.

Scorecard8 real differences · 3 level
EngineCalc versus Hydraulic Calculator Engineer: the parameters behind the verdict, then further details
ParameterEngineCalcHydraulic Calculator Engineer
Price$0.99Free — better
Rating2.3 (3 ratings)4.3 (9 ratings) — better
Positive reviews60.0% of reviews — better0.0% of reviews
Number of ratings39 — better
Update frequencyEvery 2 months — betterEvery 22 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#184 — better—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS6.0 — better15.0
Further details — not scored
Size8 MB21 MB
Age rating4+4+
DeveloperiTrinity, Inc.Arsosa Network Inc.

Customer experience

EngineCalc

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews5 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

Hydraulic Calculator Engineer

All ratings9 ratings
Positive88.9%
Neutral0.0%
Negative11.1%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

EngineCalc

No in-app purchases

None

Hydraulic Calculator Engineer

No in-app purchases

Questions

Is EngineCalc free?
EngineCalc costs $0.99, with no in-app purchases.
Is Hydraulic Calculator Engineer free?
Hydraulic Calculator Engineer is free to download, with no in-app purchases.
Which has better reviews, EngineCalc or Hydraulic Calculator Engineer?
Hydraulic Calculator Engineer is rated higher. EngineCalc averages 2.3 out of 5 from 3 ratings, while Hydraulic Calculator Engineer averages 4.3 from 9 ratings.
Do EngineCalc or Hydraulic Calculator Engineer have ads?
Neither EngineCalc nor Hydraulic Calculator Engineer shows ads.
Which is updated more often, EngineCalc or Hydraulic Calculator Engineer?
EngineCalc ships an update every 2 months, and Hydraulic Calculator Engineer every 22 months. Most recently, EngineCalc was updated on August 14, 2026 and Hydraulic Calculator Engineer on September 28, 2026.

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