# Resistor Tools Pro vs PeakTech Safety Tester

The clearest difference is price: PeakTech Safety Tester at Free against Resistor Tools Pro's $0.99. PeakTech Safety Tester also leads on iOS requirement (9.0 vs 12.0). Resistor Tools Pro's advantage is update cadence (every 2 months vs every 7 months). On ads, in-app purchases and device support there is nothing between them.

PeakTech Safety Tester is free to download; Resistor Tools Pro costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Resistor Tools Pro ships an update every 2 months, PeakTech Safety Tester every 7 months. The most recent releases landed on October 21, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Resistor Tools Pro | PeakTech Safety Tester |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/resistor-tools-pro/id825620924/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 7 months |
| Monetization | Paid | — |
| Size | 4 MB | 9 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [PeakTech GmbH](https://appshunter.io/developer/1055634501) |

## 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


### PeakTech Safety Tester

[App page](https://appshunter.io/ios/app/peaktech-safety-tester/id1537039783)

**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 PeakTech Safety Tester free?

PeakTech Safety Tester is free to download, with no in-app purchases.

### Do Resistor Tools Pro or PeakTech Safety Tester have ads?

Neither Resistor Tools Pro nor PeakTech Safety Tester shows ads.

### Which is updated more often, Resistor Tools Pro or PeakTech Safety Tester?

Resistor Tools Pro ships an update every 2 months, and PeakTech Safety Tester every 7 months. Most recently, Resistor Tools Pro was updated on October 21, 2026 and PeakTech Safety Tester on October 27, 2026.

---

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