Ask HN: Are there any good hard blocking apps / mechanisms on Mobile

I use MacOS as my primary device. On it I have edited /etc/hosts to block most of sites which I find I am impulsively visiting (news, social media etc.). Since unblocking required editing the file which requires a password (and I have a long inconvenient password) and clearing the cache, this is a good enough barrier to block the impulse.

I use an Android device for mobile and I wanted to the same here - block at device level. Router level blocking is not something I want since on mobile I can just connect to the mobile network and I guess that will bypass router level blocking. Is there any similar process I can use to block the sites on mobile as well ? Used NetGuard for a while but it was so easy to turn it off.