Comparison

Hydraulic Calculator Engineer vs Mathgra Math Grapher

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

Head to head
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.

About

Mathgra Math Grapher

Features
Read full description

FEATURES: • Simple, intuitive UI for plotting math expressions • Enter formulas or functions in fields y1 to y5 • Expressions can be as simple as "x" or as complex as needed • Plot multiple functions at once and view them on the same graph • Built-in function keyboard includes: sin, cos, tan, log, sqrt, pow, and more • Enter values using custom keyboards: Numbers, Letters, Functions • Adjust graph range with Min/Max for x and y • Tap Edit to modify long formulas in a full-screen editor • Save and load formulas • Pan graph using arrow buttons • Zoom in and out with + and – Perfect for students, educators, and anyone who wants to explore math visually.

Screenshots

Hydraulic Calculator Engineer4 screens
Mathgra Math Grapher3 screens

Verdict

The call

The clearest difference is ads: Hydraulic Calculator Engineer at none against Mathgra Math Grapher's shown. Hydraulic Calculator Engineer also leads on iOS requirement (15.0 vs 18.0). Mathgra Math Grapher's advantage is update cadence (daily vs every 22 months). On price, 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

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

UpkeepUpdate frequency

Hydraulic Calculator Engineer ships an update every 22 months, Mathgra Math Grapher daily. The most recent releases landed on September 28, 2026 and June 3, 2026 respectively.

Scorecard3 real differences · 7 level
Hydraulic Calculator Engineer versus Mathgra Math Grapher: the parameters behind the verdict, then further details
ParameterHydraulic Calculator EngineerMathgra Math Grapher
PriceFreeFree
Rating4.3 (9 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings9 — better—
Update frequencyEvery 22 monthsDaily — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better18.0
Further details — not scored
Size21 MB8 MB
Age rating4+4+
DeveloperArsosa Network Inc.Hideyuki Inada

In-app purchases

None

Hydraulic Calculator Engineer

No in-app purchases

None

Mathgra Math Grapher

No in-app purchases

Questions

Is Hydraulic Calculator Engineer free?
Hydraulic Calculator Engineer is free to download, with no in-app purchases.
Is Mathgra Math Grapher free?
Mathgra Math Grapher is free to download, with no in-app purchases.
Do Hydraulic Calculator Engineer or Mathgra Math Grapher have ads?
Mathgra Math Grapher shows ads; Hydraulic Calculator Engineer does not.
Which is updated more often, Hydraulic Calculator Engineer or Mathgra Math Grapher?
Hydraulic Calculator Engineer ships an update every 22 months, and Mathgra Math Grapher daily. Most recently, Hydraulic Calculator Engineer was updated on September 28, 2026 and Mathgra Math Grapher on June 3, 2026.

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