dynamic ringer volume1

When you receive a phone call the app will check the noise level around you. And depending on how noisy it is,

It will either raise or lower the ringer volume.

for this app to work it needs a plugin called autovoice that will detect the ambient noise. get it from the app store

https://play.google.com/store/apps/details?id=com.joaomgcd.autovoice&hl=en