This app will show current sound wave and will allow you to generate a random number from 1 to 6 based on some basic maths over the bytes contained in the last sound wave.
Device random generator functions are not used. This random number should be more truly random than that!

This app requires RECORD_AUDIO permission, however sound bytes are only displayed in screen and destroyed inmediately. No real recording is done here: This app does not store waves in persistent storage, neither it send the sounds to any app/web/server.
This app is also free with no ads. Enjoy it!