Not to shill but if you're struggling with apps on your (i)phone, I can't recommend https://www.foqos.app/ enough. My weekly screentime (as measured by my iphone, not true screen time) is <1hr. NFC tag is optional you can literally buy a candy bar and tape the barcode to an index card and that will work. The physical layer is massive. Now my problem is just limited to desktop which is easier to control.