One of the oldest programs but stil funny to play with. It uses autocorrelation function to analyze a sound. The most funny thing is that the program was used to make scientific
measurements of growing sunflowers.

Download sonar.

The program uses ols sound system but should work.

Android version:

Upload the APK file to your Google Drive. Download

Download and open the APK from Google Drive to install it.

Follow the on-screen instructions carefully (do not rush).