[GeoAtreides]

not sure where the problem is?

look at maps only in the car, mute whatsapp and then check it from time to time.

seems pretty straightforward.

[n4r9]

Addictive behaviour is rarely cured by telling the addict to "just stop doing it".

[Izkata]

Maybe they can get addicted to something else?

There's an app for Android called "Forest" that gamifies not using your phone: https://play.google.com/store/apps/details?id=cc.forestapp

[GeoAtreides]

is OP addicted to checking out maps and the parents group on whatsapp?

[jb1991]

Nope, addicted to everything else that comes with it. Hence the desire for an alternative.