Naked Browser in phone. Icecat on desktop.
Nothing. If the website is usable like this site or 4chan's then just use the website and don't use the phone apps. I use a minimalist approach regarding these stuff.
However I have installed the following apps other than what's standard ok most phones.
Netguard(Get the github one which has hostblocker)
Orbot(Use with netguard's SOCK5 routing)
Alternatively if you have root you can use adaway and afwall instead of netguard
WPS Office(Uninstall all jewgle docs apps)
Naked Browser Pro(Remove Chrome)