Ask HN: Can you recommend any website blocking apps for Android?

I used it use a Firefox addon but I’m not sure the state of those on android.

You could a dns level blocker like nextdns or AdGuard, you’ll pick up added benefits of blocking ads across whole device

If any of your browsers support uBlock then in uBlock's My Filters add

    ||someDomain1.tld^
    ||someDomain2.tld^