PiHole is a DNS based content-blocker (not a IP firewall), whilst PfSense is a packet filter (it doesn't know which app's packets its allowing/dropping, for exa

PiHole is a DNS based content-blocker (not a IP firewall), whilst PfSense is a packet filter (it doesn't know which app's packets its allowing/dropping, for example). The RethinkDNS android app is comparable to Glasswire / LittleSnitch / LuLu firewalls that are OS-specific and can help keep tabs on the network activity of installed apps and services.