Oscilloscope is a real-time audio spectrum analyzer, waveform sound visualizer, and microphone level meter. It provides reasonable frequency resolution across the entire available frequency spectrum. This Android application is designed to help users quickly evaluate audio signal features without the need for more accurate devices or extensive knowledge of math and physics.

The Oscilloscope allows users to understand various aspects of audio signals, such as car engine RPM, musical instrument peak frequency, voice characteristics, sound signal level, waveform, and FFT waterfall history. It offers a graphic representation of the signal, eliminating the need for dB values on the grid. This simplifies the evaluation of frequency and its history without overwhelming users with excessive and potentially inaccurate data.

Although zooming in on the spectrum plot is not currently supported, the developers are open to user feedback and feature requests. The application is free to use and offers a valuable tool for analyzing audio signals on the go.