Comparison

Viscosity Conversion vs Fluid Mechanics Calc

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

Head to head
About

Viscosity Conversion

Features
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Viscosity Conversion - Easily convert between various types of units for Dynamic Viscosity, Kinematic Viscosity, and Dynamic Viscosity for Oil and Water. Viscosity is the state of being thick, sticky, and semi-fluid in consistency, primarily due to internal friction. It is quantified by a measure of the magnitude of internal friction, typically represented as the force per unit area resisting flow between parallel layers at a unit distance apart moving at unit speed relative to each other. Viscosity of a fluid indicates its resistance to gradual deformation under shear stress or tensile stress. In everyday terms, it's akin to the concept of "thickness." For instance, honey exhibits significantly higher viscosity compared to water. Fluid viscosity reflects its resistance to shear or flow and serves as an indicator of its adhesive, cohesive, or frictional properties. This resistance arises due to internal molecular friction within the fluid, resulting in a frictional drag effect. There are two key measures of fluid viscosity: dynamic and kinematic viscosity. Viscosity Types: 1. Dynamic Viscosity - Characteristic of fluids and plastic solids, dynamic viscosity quantifies a substance's resistance to deformation and is informally known as "thickness." 2. Dynamic Viscosity for Oil and Water - Conversion factors for viscosity, encompassing various oils, water, glycerin, and different temperatures. 3. Kinematic Viscosity - Includes units such as Stokes, centistokes, lentor, square meter/second, square foot/second, poise cubic centimeter/gram, and more. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.

About

Fluid Mechanics Calc

This utility app provides a comprehensive calculator for fluid mechanics, civil, and structural engineering parameters. It offers over 130 formulas and 360 calculation methods, supporting seamless unit system switching for analysis, design, and operation of fluid-related systems.

Highlights
  • 130+ fluid mechanics formulas
  • 360+ calculation methods
  • Unit system conversion (metric/US)
  • Favorite formula marking
  • High mathematical precision
  • Seamless unit switching
Features
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The app is useful for the fluid thinkers. This app covers a wide variety of topics and helps in analysis, design, maintenance and operation of fluid related systems. The calculator will provide results for different fluid mechanics, civil, structural, pipe flow and engineering parameters. It is useful in the fields of automotive, aviation, geology, space, biological applications, petroleum, marine systems and cylinder manufacturing. This app comes handy to students, engineers, analysts, researchers and the curious. Here are the useful features of this app LISTS 130+ FORMULAE Memorizing hundreds of formula is not the way to go when it comes to learning fluid mechanics 360+ METHODS OF CALCULATION This calculator allows a user to change subject of formula based on the variable he/she wants to calculate. The formula applied is displayed in the app CALCULATE FOR ANSWERS Key in the numbers, set units and see results. Switch upto three conversion units. The app accepts input and provides results to the highest mathematical precision MARK FAVORITES Easy markups for easy recall HOP SEAMLESSLY BETWEEN BETWEEN METRIC AND US (INCH) UNIT SYSTEMS The app maintains separate functioning of these unit systems. The app has a predefined library of units designated to each of them It would be a good idea to kill the app and re-open it once in a while with the internet. We constantly strive to update, increase and enrich the content of the app. Go fluid with this app in your pocket!

Screenshots

Viscosity Conversion4 screens
Fluid Mechanics Calc4 screens

Verdict

The call

The clearest difference is price: Fluid Mechanics Calc at Free against Viscosity Conversion's $2.99. Viscosity Conversion's advantage is iOS requirement (13 vs 15.6). On update cadence, 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

Fluid Mechanics Calc is free to download; Viscosity Conversion costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Viscosity Conversion ships an update every 30 months, Fluid Mechanics Calc every 22 months. The most recent releases landed on October 29, 2026 and October 12, 2026 respectively.

Scorecard2 real differences · 7 level
Viscosity Conversion versus Fluid Mechanics Calc: the parameters behind the verdict, then further details
ParameterViscosity ConversionFluid Mechanics Calc
Price$2.99Free — better
Rating—5.0 (3 ratings) — better
Number of ratings—3 — better
Update frequencyEvery 30 monthsEvery 22 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13 — better15.6
Further details — not scored
Size1 MB108 MB
Age rating4+4+
DeveloperNitrioTrelleborg Sealing Solutions

In-app purchases

None

Viscosity Conversion

No in-app purchases

None

Fluid Mechanics Calc

No in-app purchases

Questions

Is Viscosity Conversion free?
Viscosity Conversion costs $2.99, with no in-app purchases.
Is Fluid Mechanics Calc free?
Fluid Mechanics Calc is free to download, with no in-app purchases.
Do Viscosity Conversion or Fluid Mechanics Calc have ads?
Neither Viscosity Conversion nor Fluid Mechanics Calc shows ads.
Which is updated more often, Viscosity Conversion or Fluid Mechanics Calc?
Viscosity Conversion ships an update every 30 months, and Fluid Mechanics Calc every 22 months. Most recently, Viscosity Conversion was updated on October 29, 2026 and Fluid Mechanics Calc on October 12, 2026.

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