Comparison

Fluid Mechanics Calculator vs Graycode

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

Head to head
About

Fluid Mechanics Calculator

This app provides 97 calculators for fluid mechanics and civil engineering parameters. It supports both Imperial (USCS) and Metric (SI) units, offering automatic and accurate calculations with unit changes.

Highlights
  • 97 fluid mechanics and civil engineering calculators
  • Supports SI and USCS (Imperial) units
  • Automatic calculations with unit changes
  • Wide range of parameters covered
  • Civil engineering applications
Features
Read full description

Fluid Mechanics Calculator contains 97 calculators to compute different Fluid Mechanics and Civil Engineering parameters — now with a solve-for-any-variable engine: in every calculator, choose the value you want to find and enter the rest. Available in both USCS (Imperial Units) and SI (Metric Units). What's new in this version: • Filter calculators by category — pressure, open channel, pipe, groundwater, pump, and dimensionless numbers • Solve for any variable — pick the unknown in each calculator; no more fixed inputs and outputs • Share any calculation as an image Features: • 97 Fluid Mechanics and Civil Engineering calculators • Automatic, instant results on every value and unit change • USCS (Imperial) and SI (Metric) units throughout • Clear formulas and definitions for every calculator Calculator List: Absolute Pressure Brake Horsepower Bernoulli Theorem for Head Loss Bulk Modulus Buoyant Force Chezy Coefficient Chezy Velocity Compressibility External Hydrostatic Pressure Flow Rate Fluid Density with Pressure Fluid Pressure Hydraulic Radius Kinematic Viscosity Liquid Phase Diffusion Coefficient Pump Efficiency Manning Flow Velocity Mean Depth Minor Losses Net Positive Suction Head and Cavitation Specific Gas Constant Specific Gravity with Water Weight Specific Gravity with Water Weight Loss Specific Volume Thrust Block Water Horsepower Acoustic Flow Meter Bazin's Weir Flow Broad Crested Weir Curb Capture Flow Rate Curb Gutter Flow Rate French Drain Seepage Rate Gutter Capture Efficiency Gutter Carryover Gutter Interception Capacity Rectangular Weir Rectangular Weir Discharge - Francis Equation Orifice Flow Rate Parshall Flume Flow Rate Permeameter Porous Medium Flow Rate Unconfined Aquifer Well Flow Rate V notch Weir Venturi Meter for Flow Rate Hazen Williams - Fluid Flow Rate Hazen Williams - Mean Fluid Velocity Aluminum Pipe - Pressure Rating Buried Corrugated Metal Pipe Thrust - Cross Sectional Area Buried Corrugated Metal Pipe Thrust - Pipe Wall Buried Corrugated Metal Pipe Thrust - Pressure Ductile Iron Pipe - Pressure Ductile Iron Pipe - Wall Thickness Pipe Vacuum Pressure Load Pipe Water Buoyancy Factor Plastic Pipe - AWWA C900 Pressure Class Plastic Pipe - Inside Diameter Controlled Plastic Pipe - Outside Diameter Controlled Plastic Pipe - Outside Diameter Controlled Short Term Strength Plastic Pipe - Short Term Pressure Rating Slotted Pipe Gutter Interception Smooth Wall Steel Pipe - Pressure Rating Soil Load Per Linear Length of Pipe Restrained Anchored Pipe Stress Pipe Soil Weight Pressure Unrestrained Pipe Length Change Poiseuille's Law Stokes Law Cauchy Number Cavitation Number Eckert Number Euler Number Fourier Number Froude Number Knudsen Number Lewis Number Mach Number Prandtl Number Reynolds Number Schmidt Number Sherwood Number Nusselt Number Peclet Number Strouhal Number Threshold Odor Number Weber Number Darcy Weisbach - Head Loss Darcy's Law - Flow Rate Darcy's Law - Flux Darcy's Law - Hydraulic Gradient Darcy's Law - Porosity Darcy's Law - Saturated Soil Darcy's Law - Seepage Velocity Darcy's Law - Seepage Velocity and Porosity Darcy's Law - Void Ratio Water Hammer - Maximum Surge Pressure for a Fluid Water Hammer - Maximum Surge Pressure for Water Water Hammer - Maximum Surge Pressure Head Water Hammer - Pressure Increase

About

Graycode

This utility converts numbers between decimal, hexadecimal, binary, and Gray code formats. Changes to one value automatically update the others, making it a convenient tool for engineers. It also features an animated demonstration of the Tower of Hanoi puzzle.

Highlights
  • Decimal, hex, binary, Gray code conversion
  • Real-time updates
  • Handy calculator for engineers
  • Animated Tower of Hanoi solution
  • Supports iPhone, iPad, iPod
Features
Read full description

This app is used to convert numbers among decimal, hex, binary and gray code. If a user changes any one of these numbers, the other ones will change accordingly. It is a handy calculator for engineers to obtain the binary or gray code values from a decimal, or vise versa. In addition, an animated solution of a Hanoi Tower with three disks is also demonstrated based on the input number.

Screenshots

Fluid Mechanics Calculator4 screens
Graycode4 screens

Verdict

The call

The clearest difference is review sentiment: Graycode at 67% against Fluid Mechanics Calculator's 0%. Graycode also leads on iOS requirement (12.0 vs 16.1). Fluid Mechanics Calculator's advantage is rating (4.5 vs 3.0) and ratings volume (21 vs 2). On price, update cadence, ads and in-app purchases 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

Fluid Mechanics Calculator costs $2.99 and Graycode $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Fluid Mechanics Calculator holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: Fluid Mechanics Calculator has 21 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 0% of Fluid Mechanics Calculator's written reviews are positive against 67% of Graycode's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Fluid Mechanics Calculator ships an update every 7 months, Graycode every 10 months. The most recent releases landed on October 7, 2026 and September 25, 2026 respectively.

Scorecard4 real differences · 6 level
Fluid Mechanics Calculator versus Graycode: the parameters behind the verdict, then further details
ParameterFluid Mechanics CalculatorGraycode
Price$2.99$2.99
Rating4.5 (21 ratings) — better3.0 (2 ratings)
Positive reviews0.0% of reviews66.7% of reviews — better
Number of ratings21 — better2
Update frequencyEvery 7 months — betterEvery 10 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.112.0 — better
Further details — not scored
Size11 MB2 MB
Age rating4+4+
DeveloperV PUGAZHENTHIDuo Pisceses, Inc.

Customer experience

Fluid Mechanics Calculator

All ratings21 ratings
Positive85.7%
Neutral9.5%
Negative4.8%
Written reviews3 reviews
Positive0.0%
Neutral33.3%
Negative66.7%

Graycode

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews6 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

Fluid Mechanics Calculator

No in-app purchases

None

Graycode

No in-app purchases

Questions

Is Fluid Mechanics Calculator free?
Fluid Mechanics Calculator costs $2.99, with no in-app purchases.
Is Graycode free?
Graycode costs $2.99, with no in-app purchases.
Which has better reviews, Fluid Mechanics Calculator or Graycode?
Fluid Mechanics Calculator is rated higher. Fluid Mechanics Calculator averages 4.5 out of 5 from 21 ratings, while Graycode averages 3.0 from 2 ratings.
Do Fluid Mechanics Calculator or Graycode have ads?
Neither Fluid Mechanics Calculator nor Graycode shows ads.
Which is updated more often, Fluid Mechanics Calculator or Graycode?
Fluid Mechanics Calculator ships an update every 7 months, and Graycode every 10 months. Most recently, Fluid Mechanics Calculator was updated on October 7, 2026 and Graycode on September 25, 2026.

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