# LED Resistor Calculator & SMD vs Resistor Color Code Reader

The clearest difference is update cadence: Resistor Color Code Reader at every 4 weeks against LED Resistor Calculator & SMD's every 4 months. LED Resistor Calculator & SMD's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.4). On price, ads and in-app purchases there is nothing between them.

Both are free to download. LED Resistor Calculator & SMD sells 1 one-off in-app purchase and Resistor Color Code Reader sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

LED Resistor Calculator & SMD ships an update every 4 months, Resistor Color Code Reader every 4 weeks. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | LED Resistor Calculator & SMD | Resistor Color Code Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 weeks** |
| Size | 60 MB | 58 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | +4 | 4+ |
| Developer | [Sachinbhai Surani](https://appshunter.io/developer/1838685550) | [Ravinderjeet Dhillon](https://appshunter.io/developer/1896491671) |

## What reviewers say

### LED Resistor Calculator & SMD

[App page](https://appshunter.io/ios/app/led-resistor-calculator-and-smd/id6758712387)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime premium | $12.99 | one-time |


### Resistor Color Code Reader

[App page](https://appshunter.io/ios/app/resistor-color-code-reader/id6799727676)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Workbench Tools | $3.99 | one-time |


## Frequently asked questions

### Is LED Resistor Calculator & SMD free?

LED Resistor Calculator & SMD is free to download, with in-app purchases available.

### Is Resistor Color Code Reader free?

Resistor Color Code Reader is free to download, with in-app purchases available.

### Do LED Resistor Calculator & SMD or Resistor Color Code Reader have ads?

Neither LED Resistor Calculator & SMD nor Resistor Color Code Reader shows ads.

### Which is updated more often, LED Resistor Calculator & SMD or Resistor Color Code Reader?

LED Resistor Calculator & SMD ships an update every 4 months, and Resistor Color Code Reader every 4 weeks. Most recently, LED Resistor Calculator & SMD was updated on October 12, 2026 and Resistor Color Code Reader 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.*