I have in my backlogs of projects (one day I will have time for them...) an extreme "dumb smartphone".<p>I want to have maps, whatsapp, chatgpt, a document scanner, my banking app, a guitar tuner... these are tools.<p>So I need both an app whitelist (there are only so many apps that I actually use on my phone) and a website blacklist (no more HN, reddit, twitter, facebook, news websites, etc). I can use those on my computer but it won't be a mindless scroll whenever I have 5 minutes.<p>Unfortunately I don't think this is feasible on iOS (I have tried Opal but it was so buggy I gave up). A custom Android launcher seems promising, but I have not found how to install a system wide firewall yet. Maybe creating a custom Android OS is the only way to have enough control?