# SJ Resistor Calculator vs GameDropRadar

The clearest difference is price: SJ Resistor Calculator at Free against GameDropRadar's $0.99. SJ Resistor Calculator also leads on update cadence (every 2 weeks vs monthly). GameDropRadar's advantage is in-app purchases (none vs 5) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

SJ Resistor Calculator is free to download; GameDropRadar costs $0.99 up front. SJ Resistor Calculator sells 5 one-off in-app purchases. GameDropRadar asks for nothing beyond the download.

SJ Resistor Calculator ships an update every 2 weeks, GameDropRadar monthly. The most recent releases landed on November 4, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | SJ Resistor Calculator | GameDropRadar |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| 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 | **No** |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 10 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Stephane JAILLIARD](https://appshunter.io/developer/1749751077) | [HASAN BERAT GURBUZ](https://appshunter.io/developer/1788124139) |

## 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, Vision Pro support

**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 |


### GameDropRadar

[App page](https://appshunter.io/ios/app/gamedropradar/id6792497198)

**Features:** macOS Compatibility, Vision Pro support, iPhone Duo support

**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 GameDropRadar free?

GameDropRadar costs $0.99, with no in-app purchases.

### Do SJ Resistor Calculator or GameDropRadar have ads?

SJ Resistor Calculator shows ads; GameDropRadar does not.

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

SJ Resistor Calculator ships an update every 2 weeks, and GameDropRadar monthly. Most recently, SJ Resistor Calculator was updated on November 4, 2026 and GameDropRadar on November 6, 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.*