# GKB 全宅控 vs SJ Resistor Calculator

The clearest difference is in-app purchases: GKB 全宅控 at none against SJ Resistor Calculator's 5. GKB 全宅控 also leads on ads (none vs shown) and iOS requirement (10.0 vs 16.0). SJ Resistor Calculator's advantage is update cadence (every 2 weeks vs every 6 months). On price and device support there is nothing between them.

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

GKB 全宅控 ships an update every 6 months, SJ Resistor Calculator every 2 weeks. The most recent releases landed on October 6, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | GKB 全宅控 | 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 | **No** | Yes |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 9 MB | 4 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [科霖 李](https://appshunter.io/developer/556548399) | [Stephane JAILLIARD](https://appshunter.io/developer/1749751077) |

## What reviewers say

### GKB 全宅控

[App page](https://appshunter.io/ios/app/gkb/id556548396)

**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, 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 |


## Frequently asked questions

### Is GKB 全宅控 free?

GKB 全宅控 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 GKB 全宅控 or SJ Resistor Calculator have ads?

SJ Resistor Calculator shows ads; GKB 全宅控 does not.

### Which is updated more often, GKB 全宅控 or SJ Resistor Calculator?

GKB 全宅控 ships an update every 6 months, and SJ Resistor Calculator every 2 weeks. Most recently, GKB 全宅控 was updated on October 6, 2026 and SJ Resistor Calculator on October 24, 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.*