# SJ Resistor Calculator vs Resistor color decoder

The clearest difference is in-app purchases: Resistor color decoder at none against SJ Resistor Calculator's 5. On price, update cadence, 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 color decoder asks for nothing beyond the download.

SJ Resistor Calculator ships an update every 2 weeks, Resistor color decoder every 9 days. The most recent releases landed on July 18, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | SJ Resistor Calculator | Resistor color decoder |
| --- | --- | --- |
| 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 | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 6 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Stephane JAILLIARD](https://appshunter.io/developer/1749751077) | [Michal Pajdak](https://appshunter.io/developer/1794089424) |

## What reviewers say

### 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 |


### Resistor color decoder

[App page](https://appshunter.io/ios/app/resistor-color-decoder/id6744559438)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SJ Resistor Calculator free?

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

### Is Resistor color decoder free?

Resistor color decoder is free to download, with no in-app purchases.

### Do SJ Resistor Calculator or Resistor color decoder have ads?

Both SJ Resistor Calculator and Resistor color decoder show ads.

### Which is updated more often, SJ Resistor Calculator or Resistor color decoder?

SJ Resistor Calculator ships an update every 2 weeks, and Resistor color decoder every 9 days. Most recently, SJ Resistor Calculator was updated on July 18, 2026 and Resistor color decoder on September 9, 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.*