# Resistor Tools vs SMD decoder

The clearest difference is in-app purchases: SMD decoder at none against Resistor Tools's 1. SMD decoder also leads on update cadence (every 2 days vs every 2 months). Resistor Tools's advantage is ratings volume (10 vs 1). On price, rating, ads and device support there is nothing between them.

Both are free to download. Resistor Tools sells 1 one-off in-app purchase. SMD decoder asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Resistor Tools against 5.0 for SMD decoder. That said, the two scores are not equally well evidenced: Resistor Tools has 10 ratings behind it against 1, so its average is the more settled of the two.

Resistor Tools ships an update every 2 months, SMD decoder every 2 days. The most recent releases landed on September 24, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Resistor Tools | SMD decoder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (10 ratings)](https://appshunter.io/ios/app/resistor-tools/id826045228/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/smd-decoder/id6473452077/reviews) |
| Number of ratings | **10** | 1 |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 4 MB | 43 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Arkadiusz Fryszkowski](https://appshunter.io/developer/1142676058) |

## What reviewers say

### Resistor Tools

[App page](https://appshunter.io/ios/app/resistor-tools/id826045228)

This utility app provides a suite of tools for calculating and determining resistor values. It assists hobbyists and engineers with series, parallel, and voltage divider calculations, as well as inverting amplifier gain.

**Highlights:** Series and parallel resistor calculation, Resistor combination finder, Voltage divider ratio and value calculation, Inverting amplifier gain calculation, Save combinations to CSV

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock pro feature | $0.99 | one-time |


### 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


## Frequently asked questions

### Is Resistor Tools free?

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

### Is SMD decoder free?

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

### Which has better reviews, Resistor Tools or SMD decoder?

Resistor Tools and SMD decoder are both rated 5.0 out of 5 on the App Store, from 10 and 1 ratings respectively.

### Do Resistor Tools or SMD decoder have ads?

Neither Resistor Tools nor SMD decoder shows ads.

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

Resistor Tools ships an update every 2 months, and SMD decoder every 2 days. Most recently, Resistor Tools was updated on September 24, 2026 and SMD decoder on June 1, 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.*