# Resistor Calculator & Ohms Law — Resistor Color Band Calculator

> Resistor Color Band Calculator (iPhone/iPad app by Alper Sumer Guc.)

- Source: https://appshunter.io/ios/app/resistor-calculator-and-ohms-law/id6769907481 (this page in markdown: same URL + `.md`)
- Developer: [Alper Sumer Guc](https://appshunter.io/developer/1896672915)
- Category: Utilities, Reference
- Price: Free
- Age rating: 4+
- Requires: iOS 16.6 · 5 MB
- Languages: English, French, German, Hindi, Italian, Japanese, Korean, Portuguese, Russian, Chinese and 2 more
- Released: 2026-05-19
- Data updated: 2026-07-06
- User reviews in markdown: https://appshunter.io/ios/app/resistor-calculator-and-ohms-law/id6769907481/reviews.md

## What is Resistor Calculator & Ohms Law?

The complete resistor toolkit for makers, students, hobbyists, and engineers.

Decode color bands, SMD codes, and run Ohm's Law calculations — all in one fast, beautifully designed app. No internet required, no ads, no tracking.

KEY FEATURES

- Color Band Decoder — Full support for 4, 5, and 6-band resistors. Tap any band to change its color and watch the value update instantly with tolerance range.
- Reverse Lookup — Enter a resistance value in Ω, kΩ, or MΩ and instantly see the matching color bands at your preferred tolerance (±1%, ±2%, ±5%, ±10%).
- SMD Code Decoder — Handles all four major formats: 3-digit (like 103 = 10 kΩ), 4-digit (like 1002 = 10 kΩ), R-notation (like 4R7 = 4.7 Ω), and precision EIA-96 codes (like 01A = 100 Ω).
- Ohm's Law Calculator — Calculate voltage, current, resistance, or power from any two known values. Every formula combination supported: V=IR, I=V/R, P=VI, P=V²/R, P=I²R.
- Favorites & History — Save frequently-used values to favorites. Recent calculations are kept in your history automatically.
- E-Series Standards — Visual indicators show when a value matches the standard E6, E12, or E24 series — perfect for BOM verification and component selection.
- Dark & Light Mode — Auto-adapts to your system theme. Easy on the eyes whether you're soldering at midnight or debugging in daylight.
- 10 Languages — English, Turkish, German, Spanish, French, Italian, Russian, Portuguese, Japanese, Chinese.

PERFECT FOR

- Electronics hobbyists and makers
- Engineering and electronics students
- Arduino, Raspberry Pi, and DIY enthusiasts
- Field technicians and repair professionals
- Educators teaching electronics
- Anyone working with through-hole or SMD resistors

Built with care by Deve Apps — software that respects you.


## Version history (last 5 releases)

### 1.4 — 2026-06-29

• NEW — Voltage Divider: output voltage, ratio, current and power at a glance, with an optional load.
• NEW — In-app language picker: change the app's language anytime, right from the menu.
• Added two new languages: Korean and Hindi.
• Polish and small fixes.

Thanks for using Resistor Code!

### 1.3 — 2026-05-28

New: Capacitor color code decoder with 5-band support
New: Numeric code decoder (104 = 100 nF, 4R7 = 4.7 pF)
New: Tap any saved item to open in Bands view
- Improved capacitor band visualization
- Banner ads added to support free development
- Performance and UI refinements

### 1.2 — 2026-05-22

New: LED Resistor Calculator with presets for Red, Yellow, Green, Blue, White, UV, and IR LEDs
New: Series & Parallel Combinations — calculate up to 10 resistors at once
New: Modern sidebar navigation with iPad support
- Tap any favorite or saved value to open in Bands view
- Visual feedback when saving to history
- Improved keyboard handling across all input screens

### 1.1 — 2026-05-19

- Fixed keyboard blocking content on the Find (reverse lookup) tab
- Updated share and rate links
- Minor UI improvements

### 1.0 — 2026-05-19

No release notes.

## More apps by Alper Sumer Guc

- [Stock Market Hours Tracker](https://appshunter.io/ios/app/stock-market-hours-tracker/id6769607614)
- [Chess Puzzles Trainer](https://appshunter.io/ios/app/chess-puzzles-trainer/id6770581711)
- [Tapline: Endless Runner](https://appshunter.io/ios/app/tapline-endless-runner/id6771515307)
- [Latitude and Longitude Finder](https://appshunter.io/ios/app/latitude-and-longitude-finder/id6771930378)
- [Bin Hex Converter](https://appshunter.io/ios/app/bin-hex-converter/id6772515584)

All apps by Alper Sumer Guc: https://appshunter.io/developer/1896672915

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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 2026-07-06.*