AudioUtil Audio Analysis Tools is a free Android app developed by Sound-Base Audio LLC that offers a range of tools for capturing and analyzing audio signals in real-time. The app allows users to view sound waves in the time domain, measure amplitude by dragging on the screen, and set a trigger level to freeze the display if audio exceeds amplitude threshold. Additionally, it displays time and amplitude in readout and provides an amplitude readout with variable time falloff.

AudioUtil also features a linear and logged frequency axis, peak tracking for up to five peaks, and a definable frequency limit to zoom in on desired frequencies. The app has four themes/color maps to choose from which can be adjusted along with multiple parameters like sample rate, buffer size, zero padding, and window type. The app requests minimal permissions to record audio and write to storage, which are required to successfully capture sound and save screenshots to the device.

Overall, AudioUtil Audio Analysis Tools is an excellent app for those who need to capture and analyze audio signals in real-time. It is user-friendly, offers a range of features, and is available for free on the Android platform.