Spectrum Analyzer is a free Android application developed by Commanche that allows users to analyze sound frequencies using their device's microphone. This simple yet powerful tool provides an easy way to visualize sound signals and identify frequency patterns.

Upon launching the app, users are presented with a real-time graph that shows the frequency spectrum of the sound being captured by the microphone. The graph is displayed in either a linear or logarithmic scale, and users can adjust the frequency range and resolution to suit their needs.

In addition to the real-time graph, Spectrum Analyzer also provides a peak hold function that captures the highest frequency peaks over time, as well as a pause function that allows users to freeze the graph and analyze specific frequency ranges. Overall, Spectrum Analyzer is a great tool for anyone looking to analyze sound frequencies on-the-go.