# Resistor Tools Pro vs Pipe Working Pressure Calc

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.

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.

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.

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.

## The numbers

| Metric | Resistor Tools Pro | Pipe Working Pressure Calc |
| --- | --- | --- |
| Price | **$0.99** | $2.99 |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/resistor-tools-pro/id825620924/reviews) | [4.0 (2 ratings)](https://appshunter.io/ios/app/pipe-working-pressure-calc/id1447338544/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 28 months |
| Monetization | Paid | Paid |
| Size | 4 MB | 1 MB |
| Requires iOS | **12.0** | 13 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### Resistor Tools Pro

[App page](https://appshunter.io/ios/app/resistor-tools-pro/id825620924)

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

**In-app purchases:** none


### Pipe Working Pressure Calc

[App page](https://appshunter.io/ios/app/pipe-working-pressure-calc/id1447338544)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*