# SMD decoder vs SJ Resistor Calculator

The clearest difference is in-app purchases: SMD decoder at none against SJ Resistor Calculator's 5. SMD decoder also leads on ads (none vs shown) and update cadence (every 2 days 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. SMD decoder asks for nothing beyond the download.

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

SMD decoder ships an update every 2 days, SJ Resistor Calculator every 2 weeks. The most recent releases landed on June 1, 2026 and July 18, 2026 respectively.

## The numbers

| Metric | SMD decoder | SJ Resistor Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/smd-decoder/id6473452077/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/sj-resistor-calculator/id6504838457/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Every 2 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 43 MB | 4 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Arkadiusz Fryszkowski](https://appshunter.io/developer/1142676058) | [Stephane JAILLIARD](https://appshunter.io/developer/1749751077) |

## What reviewers say

### SMD decoder

[App page](https://appshunter.io/ios/app/smd-decoder/id6473452077)

Decode SMD resistors with this practical tool. It supports three-digit, four-digit, and EIA-96 encoded resistor values, providing quick and accurate identification.

**Highlights:** Decodes 3-digit SMD codes, Decodes 4-digit SMD codes, Decodes EIA-96 SMD codes, Resistor value identification

**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 SMD decoder free?

SMD decoder 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.

### Which has better reviews, SMD decoder or SJ Resistor Calculator?

SMD decoder and SJ Resistor Calculator are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

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

SJ Resistor Calculator shows ads; SMD decoder does not.

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

SMD decoder ships an update every 2 days, and SJ Resistor Calculator every 2 weeks. Most recently, SMD decoder was updated on June 1, 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.*