Comparison

Ohms Law Calc. vs Pipe Flow Liquid Pipe Diameter

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

Head to head
About

Ohms Law Calc.

This app provides a comprehensive suite of electrical calculations, including Ohm's Law, voltage drop, wire sizing, and impedance. It also offers numerous converters for various electrical units and parameters, aiding in circuit design and analysis.

Highlights
  • Ohm's Law calculations
  • Voltage drop calculator
  • Wire size calculator
  • Impedance calculations (R, L, C)
  • Electrical unit converters
  • Power and current conversions
  • Circuit design tools
Features
Read full description

Ohm's Law Calc. consists of 60 Electrical Calculators with Formulas and Circuits and 16 Electrical Converters. • Voltage Calculator • Current Calculator • Resistance Calculator • Power Calculator • Voltage Drop Calculator • Wire Size Calculator • DC Generator Calculator • Transformer Calculations (Voltage & Current) Impedance Calculators Calculate impedance for combinations of resistors (R), inductors (L), and capacitors (C) in both series and parallel configurations: • R and L in Series / Parallel • R and C in Series / Parallel • L and C in Series / Parallel • R, L and C in Series / Parallel Power and Current Conversions • kVA to Amps (Single Phase & Three Phase) • Amps to kVA (Single Phase & Three Phase) • Single Phase & Three Phase Power Calculators • Horsepower Calculators (DC, Single Phase, Three Phase) Efficiency and Power Factor Tools • Efficiency Calculators (DC, Single Phase, Three Phase) • Power Factor Calculators (Single Phase & Three Phase) Energy Storage Calculators • Energy Cost Calculator • Energy Storage Calculators (Resistance, Inductance, Capacitance) Circuit Design Tools • Star-to-Delta and Delta-to-Star Conversions • Inductive & Capacitive Reactance Calculators • Resonant Frequency Calculator • Inductor and Capacitor Sizing Equations Component Calculations • Series and Parallel Calculators for Resistance, Inductance, and Capacitance • Unknown Resistance and Capacitance Calculators (Series & Parallel) More Calculations • Neutral Current (3-Phase Unbalanced Loads) • Characteristic Impedance (Parallel & Coaxial) • Transformer Calculator • Voltage Divider Calculator Illumination Calculators • Luminous Intensity Calculator • Luminous Flux Calculator • Solid Angle Calculator Electrical Converters • Field Strength Converter • Electrical Potential Converter • Resistance and Resistivity Converters • Conductance and Conductivity Converters • Capacitance and Inductance Converters • Charge Converters: Handles conversions for electrical charge, including: • Linear Charge Density • Surface Charge Density • Volume Charge Density • Linear Current Density • Surface Current Density • Power Converter App works with both iPhones, iPads and Mac Multiple Unit Compatibility: Supports a wide range of units for all electrical parameters, including Ohms, kiloOhms, Farads, Henrys, kVA, Volts, Weber, and more.

About

Pipe Flow Liquid Pipe Diameter

This app calculates the minimum internal pipe diameter required for a specific flow rate and maximum pressure loss. It offers comprehensive results, customizable databases for materials and fluids, and generates professional reports.

Highlights
  • Pipe diameter calculation
  • Friction loss calculation
  • Customizable material and fluid databases
  • Imperial and Metric unit support
  • Professional Excel and PDF reports
  • Results verification against published data
Features
Read full description

Pipe Flow Liquid Pipe Diameter is a pipe sizing calculator app from Pipe Flow Software that calculates the minimum internal pipe diameter needed for a given flow rate at a specified maximum pressure loss. Pipe Flow Software applications are used by engineers in over 100 countries worldwide. The Pipe Diameter App has an intuitive user interface that allows for easy entry of the input data, including changes in elevation, and selection of valves & fittings. Comprehensive results include Reynolds number, friction factor, friction losses, fitting losses, fluid velocities and more. Each result is clearly displayed using expandable sections that reveal further information as needed. Users can select pipe materials, pipe diameters, pipe fittings (k factors) and liquids from the integrated databases, and these can also be extended with user specific data for custom pipe materials, diameters, fittings, and liquids. The App can operate in Imperial or Metric units and each individual field can be further customised to use a specific unit. Results values can be displayed to a specified number of decimal places. Pipe Flow Liquid Pipe Diameter calculation results have been verified against multiple cases of published data from well known sources. The results of these calculations are included in the Results Verification PDF document which can be accessed from within the App. Engineers can easily perform their pipe sizing calculations in the office or on site. Professional Excel and PDF reports can easily be shared with others. Results can also be saved to the library within the App. The Pipe Flow Liquid Pipe Diameter software has unrivalled functions and features: - Liquid properties database for water, oils, acids, and other fluids. - Pipe material database for various Steel, Aluminium, Copper, HDPE, and other pipes. - Fitting database for standard valves and bends, with associated K factor values. - User definable custom materials, fluids and fittings. - Professional Excel and PDF reports showing calculation results. - Results verification against published data to provide confidence in the calculation results. - Configurable post decimal places for display on screen and in reports. - Automatic conversion between a wide range of units. - Compatibility with Pipe Flow Wizard files for iOS, macOS and Windows. - Calculation results based on the same reliable calculation engine that is used by Pipe Flow Software's premier Pipe Flow Expert software, which is trusted by users in over 100 countries worldwide. - High quality, reliable software, and unrivalled customer support. Pipe Flow Liquid Pipe Diameter is offered as a free trial download and can be purchased for a one-time fee within the App. Terms of Use: https://www.pipeflow.com/pipe-flow-mobile-software/pipe-flow-mobile-software-license-terms

Screenshots

Ohms Law Calc.4 screens
Pipe Flow Liquid Pipe Diameter4 screens

Verdict

The call

The clearest difference is ads: Pipe Flow Liquid Pipe Diameter at none against Ohms Law Calc.'s shown. Pipe Flow Liquid Pipe Diameter also leads on update cadence (fortnightly vs every 2 months) and iOS requirement (11.0 vs 17.6). Ohms Law Calc.'s advantage is ratings volume (1.3K vs 5). On price, rating, in-app purchases and monetization model 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. Ohms Law Calc. sells 1 one-off in-app purchase and Pipe Flow Liquid Pipe Diameter sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Ohms Law Calc. against 4.6 for Pipe Flow Liquid Pipe Diameter. That said, the two scores are not equally well evidenced: Ohms Law Calc. has 1.3K ratings behind it against 5, so its average is the more settled of the two.

UpkeepUpdate frequency

Ohms Law Calc. ships an update every 2 months, Pipe Flow Liquid Pipe Diameter fortnightly. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
Ohms Law Calc. versus Pipe Flow Liquid Pipe Diameter: the parameters behind the verdict, then further details
ParameterOhms Law Calc.Pipe Flow Liquid Pipe Diameter
PriceFreeFree
Rating4.7 (1.3K ratings) — better4.6 (5 ratings)
Positive reviews50.0% of reviews—
Number of ratings1.3K — better5
Update frequencyEvery 2 monthsFortnightly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.611.0 — better
Further details — not scored
Size59 MB67 MB
Age rating4+4+
DeveloperV PUGAZHENTHIPipe Flow Software

Customer experience

Ohms Law Calc.

All ratings1,328 ratings
Positive92.8%
Neutral3.5%
Negative3.7%
Written reviews44 reviews
Positive50.0%
Neutral6.8%
Negative43.2%

Pipe Flow Liquid Pipe Diameter

All ratings5 ratings
Positive80.0%
Neutral20.0%
Negative0.0%

Bugs and requests

Ohms Law Calc.

Reported bugs

3 issues
  • Paid version not unlocking
  • Repeatedly prompting for payment after already paid
  • Keyboard overlaying results making it difficult to see

Requested features

3 requests
  • Add more electrical conversions and calculations
  • Add ability to input voltage and resistance to get amps and watts
  • Add kVA, rms, and other popular needed conversions

Pipe Flow Liquid Pipe Diameter

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Ohms Law Calc.

One-time1
  • Ohms Law Calc.$3.99
1 purchases

Pipe Flow Liquid Pipe Diameter

One-time1
  • Pipe Flow Pipe Diameter$4.99

Questions

Is Ohms Law Calc. free?
Ohms Law Calc. is free to download, with in-app purchases available.
Is Pipe Flow Liquid Pipe Diameter free?
Pipe Flow Liquid Pipe Diameter is free to download, with in-app purchases available.
Which has better reviews, Ohms Law Calc. or Pipe Flow Liquid Pipe Diameter?
Ohms Law Calc. is rated higher. Ohms Law Calc. averages 4.7 out of 5 from 1.3K ratings, while Pipe Flow Liquid Pipe Diameter averages 4.6 from 5 ratings.
Do Ohms Law Calc. or Pipe Flow Liquid Pipe Diameter have ads?
Ohms Law Calc. shows ads; Pipe Flow Liquid Pipe Diameter does not.
Which is updated more often, Ohms Law Calc. or Pipe Flow Liquid Pipe Diameter?
Ohms Law Calc. ships an update every 2 months, and Pipe Flow Liquid Pipe Diameter fortnightly. Most recently, Ohms Law Calc. was updated on October 27, 2026 and Pipe Flow Liquid Pipe Diameter on October 24, 2026.

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