# Resistor Color Code Calc + — Ohm's Law, LED & SMD Tool

> Ohm's Law, LED & SMD Tool (iPhone/iPad app by heekyung moon.)

- Source: https://appshunter.io/ios/app/resistor-color-code-calc-plus/id6790018644 (this page in markdown: same URL + `.md`)
- Developer: [heekyung moon](https://appshunter.io/developer/6779193748)
- Category: Utilities, Education
- Price: Free
- Age rating: 17+
- Requires: iOS 16.4 · 51 MB
- Languages: American English
- Released: 2026-07-20
- Data updated: 2026-09-08
- User reviews in markdown: https://appshunter.io/ios/app/resistor-color-code-calc-plus/id6790018644/reviews.md

## What is Resistor Color Code Calc +?

▶ Decode any resistor in seconds. Tap the color bands on a big, clear resistor graphic and the value, tolerance and temperature coefficient update live — 4, 5 or 6 bands, with the nearest E24 or E96 standard shown too.

▶ Go the other way. Type a value like 4.7k and the app snaps it to the nearest standard part and paints the color bands back onto the resistor, with the error against your input.

▶ Everyday electronics math in one place. Ohm's law solves V, I, R or P from any two; the LED resistor tool sizes a series resistor from supply voltage, LED forward voltage and current.

▶ Read SMD codes fast. Enter a 3-digit, 4-digit, R-notation or EIA-96 code and get the value, plus series and parallel resistance helpers for quick combinations.

▶ Works fully offline with a clean history of your calculations. Share a result, switch languages, no account needed.

Color names and values follow the standard IEC bands; always double-check critical parts against the printed markings and a meter. This is a reference and learning tool, not a substitute for measuring your actual components.


## Version history (last 5 releases)

### 1.2.5 — 2026-08-05

Alerts now arrive properly on Android instead of landing silently, and the app no longer interrupts you in the middle of what you came to do.

### 1.2.2 — 2026-08-03

Performance improvements, bug fixes, and refinements for the latest iOS.

### 1.2.1 — 2026-08-01

Performance improvements, bug fixes, and refinements for the latest iOS.

### 1.1.1 — 2026-07-30

Performance improvements, bug fixes, and refinements for the latest iOS.

### 1.1 — 2026-07-28

Performance improvements, bug fixes, and refinements for the latest iOS.

## More apps by heekyung moon

- [Blur & Mosaic Privacy](https://appshunter.io/ios/app/blur-and-mosaic-privacy/id6779193648)
- [Aurora Northern Lights](https://appshunter.io/ios/app/aurora-northern-lights/id6779193746)
- [Golden Hour Sun Tracker](https://appshunter.io/ios/app/golden-hour-sun-tracker/id6779194270)
- [GIF Maker & Editor Studio](https://appshunter.io/ios/app/gif-maker-and-editor-studio/id6779194430)
- [Slow Shutter Long Exposure](https://appshunter.io/ios/app/slow-shutter-long-exposure/id6780141566)
- [Rain Alert Nowcast](https://appshunter.io/ios/app/rain-alert-nowcast/id6780142286)

All apps by heekyung moon: https://appshunter.io/developer/6779193748

## Related topics

[resistor color code calc](https://appshunter.io/ios/topics/resistor-color-code-calc) · [resistor color codes calc](https://appshunter.io/ios/topics/resistor-color-codes-calc) · [smd resistor](https://appshunter.io/ios/topics/smd-resistor)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-08.*