Openwrt on my flint 2
With adgaurd/pihole
I know its not technically an app, but lots of people forget there routers exist and are a very big security hole
You would not believe what my samsung tv pings
Tiktok (somehow came preinstalled)
Hulu(we dont have a hulu account)
Tubi(we dont use tubi)
Amazon(it seems to be for samsung tv plus)
I ended up blocking everything except amazon, samsung tv, and netflix on the dns level
Its also really good for stopping non power users (aka family member's) from getting malware/phished