Android
Per-App Volume POL
Set each app’s media volume separately—no more one master slider.
Per-App Volume POL keeps a saved media level per app and applies it when you switch. One master volume often fights you: louder music means louder everything.
It uses Android AccessibilityService only to detect the foreground app and apply your volume preference. It does not read other apps’ screen contents for ads, and you can turn the service off anytime.
Live on Google Play — open the Play Store link on this page.