Voltage Regulator is a free Android application developed by Peter Ho, which aims to help hobbyists and electronic engineers in their projects. The app allows users to find combinations of two resistors that can produce a desired output voltage, and also calculates the resistor values for a given output voltage. In addition, users can export the results to a CSV file for further analysis.

The app has a simple and easy-to-use interface, making it accessible to users with varying levels of technical expertise. It is a useful tool for anyone working with adjustable voltage regulators, as it helps to save time and effort in calculating the required resistor values. However, it is important to note that some features, such as calculating thermal resistance of heatsink, are only available in the PRO version.