Not explicitly, but I guess sort of!
My product is a weather alerting tool which texts you when the forecast looks good for a hike / bike / sail / whatever... So I guess that reduces screen time by making you get out and adventure!
Is the question prompted by an idea you've got Sai?
@matt_harbord I think this info is available every where, but I am looking for an app where I can customise my screentime on individual apps and then get done with that