- 4 and 5 Band Resistor Support- Reverse Lookup Support- Ability to save frequently used resistors- Now Ad-Free!This Resistor Tool can display the resistance value based on the color bands. In addition, it can also display the resistor colors based on an inputted resistance value.In other words, whether you have a resistor and want to find out its value or vice versa, this app can get it done.For frequently used resistors, this app also allows you to save them to a custom list.