Resistor Code Calculator is a free iPhone app developed by Vivid Planet Software GmbH. This handy reference app is designed to help makers, engineers, students, and Arduino or Raspberry Pi tinkerers when working with electronics. With its easy-to-use interface, the app allows users to calculate resistor color codes quickly and accurately.

One of the main features of Resistor Code Calculator is its support for both 4 and 5-band resistors. This makes it versatile and suitable for a wide range of applications. The app utilizes the industry standard color-code system to identify the resistance value of resistors used in various electronic devices.

Whether you're a beginner or an experienced electronics enthusiast, Resistor Code Calculator provides a convenient tool to determine resistor values with ease. This app is a must-have for anyone working with electronics, from hobbyists to professionals.