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.
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.
- Cylinder Calculation
- Power Calculation
- Pressure Difference
- Piston Diameter
- Speed Calculation
- Lifting Time
- Volume Flow
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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.
Mathgra Math Grapher
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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.
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Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
| Parameter | Hydraulic Calculator Engineer | Mathgra Math Grapher |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (9 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 9 — better | — |
| Update frequency | Every 22 months | Daily — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 21 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Arsosa Network Inc. | Hideyuki Inada |
In-app purchases
Hydraulic Calculator Engineer
No in-app purchases
Mathgra Math Grapher
No in-app purchases
Questions
Is Hydraulic Calculator Engineer free?
Is Mathgra Math Grapher free?
Do Hydraulic Calculator Engineer or Mathgra Math Grapher have ads?
Which is updated more often, Hydraulic Calculator Engineer or Mathgra Math Grapher?
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