Is there an ELI5 for what NextDNS is/does? I downloaded and enabled it because I see it recommended often enough, but I have no idea what it does for me or if there's anything else I need to be doing with it.
NextDNS is a privacy respecting DNS service. You can learn more HERE. If you’re unable to self host your own PiHole or Adguard Home, it’s the next best option.
No apps, just use a DNS server that blocks ads. I like Control D. They have servers with many major blocklists and can be used with DoH, DoT, or just old unencrypted DNS if needed.