Comparison

Hydraulic Engineer vs NORO

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

Head to head
About

Hydraulic Engineer

This comprehensive calculator app offers over 1,000 hydraulic engineering formulas across 13 categories. It includes temperature conversions, reference tables, and the ability to save and share calculations. Works offline and supports both US Customary and SI Metric units.

Highlights
  • Over 1,000 hydraulic formulas
  • 13 specialized calculator categories
  • Temperature scale converters
  • Professional reference tables
  • Save and share calculations
  • Works offline
  • US Customary and SI Metric units
Features
Read full description

HYDRAULIC ENGINEER is the most comprehensive hydraulic engineering calculator available on the App Store, featuring over 1,000 formulas across 13 specialized calculator categories, 8 temperature scale converters, and 8 professional reference tables. CALCULATOR CATEGORIES - Actuator Formulas — cylinder force, stroke, speed, and rod calculations - Fluid Power — pressure, flow, horsepower, and torque calculations - Pump Laws — affinity laws for speed, flow, pressure, and power - Vehicle Drive — drive speed, tractive effort, gradeability, and drawbar pull - Hydraulic Tubing — wall thickness, burst pressure, and working pressure - Cylinder Calculations — extend/retract speed, rod end area, and cycle times - Thermal Hydraulics — heat generation, reservoir cooling, heat exchangers, and energy to heat fluid - Oil Velocity & Pressure Loss — pipe velocity, pressure drop per foot, and total system losses - Pipe Flow — Reynolds number, Darcy-Weisbach head loss, laminar friction, and orifice flow - Accumulator Sizing — discharge volume, precharge pressure, adiabatic and isothermal gas volumes - Reservoir Sizing — open/closed circuit sizing, cylinder-based sizing, and oil weight calculations - AC/DC Electrical — Ohm's law, power, resistance, inductance, and motor selection - Area Formulas — 60 geometric area calculations for every common shape 700+ CONVERSION FORMULAS Pressure, horsepower, BTU, flow rates, linear measure, square measure, cubic measure, liquid measure, weights, watts, power, HVAC, metric, sand-to-volume, and fraction conversions. 8 TEMPERATURE SCALES Convert between Celsius, Fahrenheit, Kelvin, Rankine, Reaumur, Newton, Delisle, and Romer — 56 conversion formulas covering every combination. 8 PROFESSIONAL REFERENCE TABLES - Pipe Schedule (Schedule 40 & 80) - ISO Viscosity Grades - Recommended Flow Velocities - Hydraulic Hose Sizing (SAE) - JIC Thread Sizes - Pipe Roughness Values - O-Ring Sizes (AS568) - Wire Rope Working Load Limits KEY FEATURES - Save and share any calculation result - Share reference tables - Calculation history - Favorites for quick access to your most-used formulas - Switch between US Customary and SI Metric units - Dual-unit display shows both US and metric values simultaneously - Dark mode optimized interface - Works offline — no internet connection required PREMIUM UPGRADE Unlock sharing, advanced calculator sections, and unlimited history with a one-time lifetime purchase — no subscriptions. HYDRAULIC ENGINEER is designed for working hydraulic engineers, technicians, maintenance professionals, and engineering students. If there are formulas or reference tables you'd like to see added, just use the built-in feedback feature to let us know.

About

NORO

Access 3D CAD data for a standard product range of pipes, mouldings, and distribution systems. Engineers and project managers can view models for steel and chromium-nickel steel components directly on mobile devices.

Highlights
  • 3D CAD data access
  • Standard product range
  • Pipes, mouldings, distribution systems
  • Steel and chromium-nickel steel
  • Compatible with major CAD systems
  • Mobile device access
Features
Read full description

The NORO app is a free download service for 3D CAD data of the standard product range of NORO Germany and provides engineers and project managers with direct access via mobile devices. Our product range includes pipes, mouldings and distribution systems with diameters of 80 to 600 mm made from steel (powder coated or galvanised) and chromium-nickel steel as well as associated pipe connection elements. The 3D CAD models are compliant with major world standards and are suitable for use in current CAD systems, such as CATIA®, Autodesk® Inventor®, SolidWorks®, Creo™ Parametric, NX™, AutoCAD®, Solid Edge®, etc.

Screenshots

Hydraulic Engineer4 screens
NORO4 screens

Verdict

The call

The clearest difference is review sentiment: NORO at 100% against Hydraulic Engineer's 25%. NORO also leads on price (Free vs $4.99) and in-app purchases (none vs 1). Hydraulic Engineer's advantage is update cadence (every 6 months vs every 66 months). On ads 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

NORO is free to download; Hydraulic Engineer costs $4.99 up front. Hydraulic Engineer sells 1 one-off in-app purchase. NORO asks for nothing beyond the download.

UpkeepUpdate frequency

Hydraulic Engineer ships an update every 6 months, NORO every 66 months. The most recent releases landed on October 6, 2026 and October 3, 2026 respectively.

Scorecard6 real differences · 4 level
Hydraulic Engineer versus NORO: the parameters behind the verdict, then further details
ParameterHydraulic EngineerNORO
Price$4.99Free — better
Rating4.0 (1 ratings) — better—
Positive reviews25.0% of reviews100.0% of reviews — better
Number of ratings1 — better—
Update frequencyEvery 6 months — betterEvery 66 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.613.0 — better
Further details — not scored
Size19 MB52 MB
Age rating4+17+
DeveloperHistorycentral.comNORO GmbH

Customer experience

Hydraulic Engineer

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews8 reviews
Positive25.0%
Neutral25.0%
Negative50.0%

NORO

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Hydraulic Engineer

One-time1
  • Hydraulic Pro$3.99
None

NORO

No in-app purchases

Questions

Is Hydraulic Engineer free?
Hydraulic Engineer costs $4.99, and also offers in-app purchases.
Is NORO free?
NORO is free to download, with no in-app purchases.
Do Hydraulic Engineer or NORO have ads?
Neither Hydraulic Engineer nor NORO shows ads.
Which is updated more often, Hydraulic Engineer or NORO?
Hydraulic Engineer ships an update every 6 months, and NORO every 66 months. Most recently, Hydraulic Engineer was updated on October 6, 2026 and NORO on October 3, 2026.

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