# SJ Resistor Calculator vs 小海豚模拟器

The clearest difference is in-app purchases: 小海豚模拟器 at none against SJ Resistor Calculator's 5. 小海豚模拟器 also leads on ads (none vs shown) and update cadence (daily vs every 2 weeks). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. SJ Resistor Calculator sells 5 one-off in-app purchases. 小海豚模拟器 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for SJ Resistor Calculator against 5.0 for 小海豚模拟器. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

SJ Resistor Calculator ships an update every 2 weeks, 小海豚模拟器 daily. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | SJ Resistor Calculator | 小海豚模拟器 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/sj-resistor-calculator/id6504838457/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/id6777438014/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 33 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Stephane JAILLIARD](https://appshunter.io/developer/1749751077) | [Luzhou Jinzhijiang Technology Co., Ltd.](https://appshunter.io/developer/1737226765) |

## 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 |


### 小海豚模拟器

[App page](https://appshunter.io/ios/app/id6777438014)

**Features:** macOS Compatibility, Vision Pro 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 小海豚模拟器 free?

小海豚模拟器 is free to download, with no in-app purchases.

### Which has better reviews, SJ Resistor Calculator or 小海豚模拟器?

SJ Resistor Calculator and 小海豚模拟器 are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do SJ Resistor Calculator or 小海豚模拟器 have ads?

SJ Resistor Calculator shows ads; 小海豚模拟器 does not.

### Which is updated more often, SJ Resistor Calculator or 小海豚模拟器?

SJ Resistor Calculator ships an update every 2 weeks, and 小海豚模拟器 daily. Most recently, SJ Resistor Calculator was updated on October 24, 2026 and 小海豚模拟器 on October 28, 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.*