Has anyone found a reliable way of blocking websites / apps (ideally on a time-restricted basis) on iPhone? Short of routing all your traffic through a remote S

Has anyone found a reliable way of blocking websites / apps (ideally on a time-restricted basis) on iPhone? Short of routing all your traffic through a remote SOCKS proxy. I'm tempted to move to Android just to customise my /etc/hosts but I'd rather there be a simpler way...