# Resistor Tools vs SKTrack

The clearest difference is in-app purchases: SKTrack at none against Resistor Tools's 1. Resistor Tools's advantage is update cadence (every 2 months vs every 10 months) and ratings volume (10 vs 1). On price, rating, ads and device support there is nothing between them.

Both are free to download. Resistor Tools sells 1 one-off in-app purchase. SKTrack asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Resistor Tools against 5.0 for SKTrack. That said, the two scores are not equally well evidenced: Resistor Tools has 10 ratings behind it against 1, so its average is the more settled of the two.

Resistor Tools ships an update every 2 months, SKTrack every 10 months. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Resistor Tools | SKTrack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (10 ratings)](https://appshunter.io/ios/app/resistor-tools/id826045228/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/sktrack/id1569155332/reviews) |
| Number of ratings | **10** | 1 |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 10 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 4 MB | 14 MB |
| Requires iOS | **12.0** | 14.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [SignaKey LLC](https://appshunter.io/developer/1438620034) |

## What reviewers say

### Resistor Tools

[App page](https://appshunter.io/ios/app/resistor-tools/id826045228)

This utility app provides a suite of tools for calculating and determining resistor values. It assists hobbyists and engineers with series, parallel, and voltage divider calculations, as well as inverting amplifier gain.

**Highlights:** Series and parallel resistor calculation, Resistor combination finder, Voltage divider ratio and value calculation, Inverting amplifier gain calculation, Save combinations to CSV

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock pro feature | $0.99 | one-time |


### SKTrack

[App page](https://appshunter.io/ios/app/sktrack/id1569155332)

This app provides immutable traceability for items by using tamper-evident seals with unique encryption. It records the date, time, and geospatial coordinates of item scanning events, ensuring secure chain of custody from origin to destination.

**Highlights:** Tamper-evident seals, Immutable traceability, Unique encryption, Geospatial coordinate recording, Chain of custody assurance, On-location scanning

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Resistor Tools free?

Resistor Tools is free to download, with in-app purchases available.

### Is SKTrack free?

SKTrack is free to download, with no in-app purchases.

### Which has better reviews, Resistor Tools or SKTrack?

Resistor Tools and SKTrack are both rated 5.0 out of 5 on the App Store, from 10 and 1 ratings respectively.

### Do Resistor Tools or SKTrack have ads?

Neither Resistor Tools nor SKTrack shows ads.

### Which is updated more often, Resistor Tools or SKTrack?

Resistor Tools ships an update every 2 months, and SKTrack every 10 months. Most recently, Resistor Tools was updated on October 5, 2026 and SKTrack on October 3, 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.*