# Resistor Code Calculators vs SJ Resistor Calculator

The clearest difference is in-app purchases: Resistor Code Calculators at none against SJ Resistor Calculator's 5. Resistor Code Calculators also leads on iOS requirement (13.4 vs 16.0). SJ Resistor Calculator's advantage is update cadence (every 2 weeks vs every 7 months). On price, ads and device support there is nothing between them.

Both are free to download. SJ Resistor Calculator sells 5 one-off in-app purchases. Resistor Code Calculators asks for nothing beyond the download.

Resistor Code Calculators ships an update every 7 months, SJ Resistor Calculator every 2 weeks. The most recent releases landed on September 17, 2026 and July 18, 2026 respectively.

## The numbers

| Metric | Resistor Code Calculators | SJ Resistor Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sj-resistor-calculator/id6504838457/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 6 MB | 4 MB |
| Requires iOS | **13.4** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kanta Kikubo](https://appshunter.io/developer/1450598215) | [Stephane JAILLIARD](https://appshunter.io/developer/1749751077) |

## What reviewers say

### Resistor Code Calculators

[App page](https://appshunter.io/ios/app/resistor-code-calculators/id1465336419)

**Features:** macOS Compatibility

**In-app purchases:** none


### SJ Resistor Calculator

[App page](https://appshunter.io/ios/app/sj-resistor-calculator/id6504838457)

This tool simplifies resistor calculations for electronics enthusiasts, students, and professionals. It accurately decodes resistor color codes and performs series/parallel calculations for complex circuit analysis. Avoid manual errors and streamline your electronics projects.

**Highlights:** Resistor color code decoding (4, 5, 6 band), Series resistor calculations, Parallel resistor calculations, Accurate resistance and tolerance values, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A coffee | $0.99 | one-time |
| A cookie | $2.99 | one-time |
| No ads | $4.99 | one-time |
| A lemon tart | $4.99 | one-time |
| A pizza | $9.99 | one-time |


## Frequently asked questions

### Is Resistor Code Calculators free?

Resistor Code Calculators is free to download, with no in-app purchases.

### Is SJ Resistor Calculator free?

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

### Do Resistor Code Calculators or SJ Resistor Calculator have ads?

Both Resistor Code Calculators and SJ Resistor Calculator show ads.

### Which is updated more often, Resistor Code Calculators or SJ Resistor Calculator?

Resistor Code Calculators ships an update every 7 months, and SJ Resistor Calculator every 2 weeks. Most recently, Resistor Code Calculators was updated on September 17, 2026 and SJ Resistor Calculator on July 18, 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.*