Comparison

Resistor Tools Pro vs Pipe Working Pressure Calc

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

Head to head
About

Resistor Tools Pro

This utility app offers a suite of tools for calculating and finding resistor combinations. It's designed for electronics enthusiasts and professionals needing to determine series, parallel, and voltage divider configurations. Save and share your calculations easily.

Highlights
  • Calculate series/parallel resistance
  • Find resistor combinations for desired resistance
  • Voltage divider ratio and value calculation
  • Inverting amplifier gain calculation
  • Save combinations to CSV
  • Share via AirDrop
  • Upload CSV to iCloud Drive
Read full description

This app is a collection of resistor calculators. It is suitable for hobbyist or electronic engineer. * Calculate resistance of 2 resistors in series or parallel * Find out combinations of 2 resistors in series/parallel making a desired resistance * Calculate ratio of R1/R2 and voltage divider * Find out resistor values of making voltage divider ratio * Find out resistor values of making inverting amplifier gain * Save combination values in CSV file * Share document via AirDrop * Upload CSV file to iCloud Drive (For iOS8 or later)

About

Pipe Working Pressure Calc

Calculate fluid pressure, pipe wall thickness, outside diameter, safety factor, or material strength. This physics/math tool provides instant results with support for multiple units and high precision.

Highlights
  • Instant calculations
  • Copy results to other apps
  • Formulas included
  • Supports 16 decimal places
  • Supports various units
  • Works on iPhone and iPad
  • Ad-free and private
Features
Read full description

Pipe Burst Working Pressure Calculator is a physics/math tool designed to calculate fluid pressure, pipe wall thickness, pipe outside diameter, safety factor, or material strength. Features: - Instant calculations. - Results can be copied to other apps. - Formulas included for reference. - Supports up to 16 decimal places. - Supports various units for each input. - Works seamlessly on both iPhone and iPad. - Lightweight, compact app optimized for everyday use. - Ad-free and built with privacy in mind. To find the burst pressure of a pipe, Barlow's Formula is used, along with associated equations to determine the working pressure of a pipe with a known diameter. Barlow’s Formula establishes the relationship between internal pressure, allowable stress, nominal thickness, and diameter. Equation: P = (2*S*T)/(OD*SF) Where: P = Fluid Pressure (psi) T = Pipe Wall Thickness (in) OD = Pipe Outside Diameter (in) SF = Safety Factor (for general calculations, use 1.5 – 10; use 1 for bursting pressure) S = Material Strength (psi), minimum yield strength Thank you for your support! Visit nitrio.com for more apps for your iOS devices.

Screenshots

Resistor Tools Pro4 screens
Pipe Working Pressure Calc4 screens

Verdict

The call

The clearest difference is update cadence: Resistor Tools Pro at every 2 months against Pipe Working Pressure Calc's every 28 months. Resistor Tools Pro also leads on price ($0.99 vs $2.99). On rating, ratings volume, 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

Resistor Tools Pro costs $0.99 and Pipe Working Pressure Calc $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.0 for Resistor Tools Pro against 4.0 for Pipe Working Pressure Calc. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

UpkeepUpdate frequency

Resistor Tools Pro ships an update every 2 months, Pipe Working Pressure Calc every 28 months. The most recent releases landed on November 4, 2026 and November 2, 2026 respectively.

Scorecard2 real differences · 7 level
Resistor Tools Pro versus Pipe Working Pressure Calc: the parameters behind the verdict, then further details
ParameterResistor Tools ProPipe Working Pressure Calc
Price$0.99 — better$2.99
Rating4.0 (1 ratings)4.0 (2 ratings)
Number of ratings12 — better
Update frequencyEvery 2 months — betterEvery 28 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better13
Further details — not scored
Size4 MB1 MB
Age rating4+4+
DeveloperSiu Yuen HoNitrio

Customer experience

Resistor Tools Pro

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Pipe Working Pressure Calc

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Resistor Tools Pro

No in-app purchases

None

Pipe Working Pressure Calc

No in-app purchases

Questions

Is Resistor Tools Pro free?
Resistor Tools Pro costs $0.99, with no in-app purchases.
Is Pipe Working Pressure Calc free?
Pipe Working Pressure Calc costs $2.99, with no in-app purchases.
Which has better reviews, Resistor Tools Pro or Pipe Working Pressure Calc?
Resistor Tools Pro and Pipe Working Pressure Calc are both rated 4.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do Resistor Tools Pro or Pipe Working Pressure Calc have ads?
Neither Resistor Tools Pro nor Pipe Working Pressure Calc shows ads.
Which is updated more often, Resistor Tools Pro or Pipe Working Pressure Calc?
Resistor Tools Pro ships an update every 2 months, and Pipe Working Pressure Calc every 28 months. Most recently, Resistor Tools Pro was updated on November 4, 2026 and Pipe Working Pressure Calc on November 2, 2026.

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