A simple real-time Oscilloscope that uses your phone’s microphone to collect and display audio wave data. Tap on the screen to freeze the display, and drag to show dB readout. Take and save screenshots to your phone through the context menu.
For more audio analysis tools download AudioUtil Spectrum Analyzer: https://play.google.com/store/apps/details?id=org.sbaudio.audiotoolsfree
*This app requires minimal permissions, but must have permission to access your microphone and record audio, as well as permission to write screenshots to your phone’s storage. No microphone data is stored and/or sent anywhere.