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Archived App (Last seen on 11 May 2026)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
About
Calculate Ohm's Law, find equivalent resistor circuits, and decode resistor color codes for through-hole and SMD components. It also provides statistics for closest resistors in different E Series.
✓Ohm's Law calculator
✓Equivalent circuit finder (series/parallel)
✓Through-hole resistor color code tool
✓SMD resistor code tool
✓Closest resistor statistics (E Series)
✓5-band resistor tool
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What's New in Resistor ToolKit, Color Codes
1.6.0
March 7, 2022
The R ToolKit now also runs on Mac computers with Apple silicon
1
In-App Purchases
$0.99
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FAQ
What is Resistor ToolKit's primary function?
Resistor ToolKit primarily serves as a convenient Ohm's Law calculator and provides tools for decoding resistor color codes for both through-hole and SMD components. It also helps in finding equivalent resistor circuits and statistics for resistors in different E Series.
Does Resistor ToolKit have ads?
No, Resistor ToolKit is ad-free. The description explicitly states that all ads are removed, and the 'hasAds' flag is false.
What devices does Resistor ToolKit support?
Resistor ToolKit is available for iPhone, iPad, and iPod. It is designed for iOS devices.
How often is Resistor ToolKit updated?
The latest version, 1.6.0, was released on March 7, 2022. While the last update was in 2022, the app has been stable since its initial release in 2015.
What is the age rating for Resistor ToolKit?
Resistor ToolKit has an age rating of 4+, making it suitable for a wide range of users, including younger learners interested in electronics.
Can I find equivalent resistor circuits with Resistor ToolKit?
Yes, Resistor ToolKit allows you to find the equivalent circuit for a specific resistor value, whether it's in series or parallel configuration.
What extra features can be unlocked in Resistor ToolKit?
Additional features that can be unlocked include a 5-band resistor tool, an SMD code resistor tool, example functionality, and info screens with more material and explanations. These are available through in-app purchases.
What is the user sentiment for Resistor ToolKit?
Based on the provided data, Resistor ToolKit has a rating of 4.3 stars from 3 ratings, indicating a generally positive user reception.
