LEDs are the future of modern lighting, but they require resistors to function properly. LED Calculator Pro is an Android app that helps you find the perfect resistor for your LED applications. The app comes with a new design and is free to use.

The app allows you to adjust current and voltage and shows the next standard-resistor value and its color code. It features a lot of preprogrammed LEDs and several power sources such as car-battery or 1.5V battery. LED Calculator Pro also calculates power rating, lets you set the number of rows and LEDs per row, and offers a circuit preview with simple editing. The best part is that it is completely ad-free.

If you find this app useful, you can support the developer by making a donation from the menu. LED Calculator Pro is a must-have app for anyone who works with LEDs and needs to find the perfect resistor for their applications.