I put dns.adguard.com on their browsers and phones.

Last I tried Technitium, it took over 100ms to resolve domain names that take 1ms otherwise.

Even if that were true, it would not matter since the source code is open and you can take a look at it to put this phobia of yours to rest.

Also FYI, AdGuard is based in Cyprus.

With AdGuard Home you don't even need to have log files, there's built in options to store it in-memory.

Tried all three over the years... I have to say AdGuard Home due to how feature-rich it is. Currently have two instances running, one at home the other for remote usage. AGH is better than the other two at nearly everything.

I've been using Pi 4 since 2019 and it's helped me manage stuff through the pandemic. I also overall agree with this post since I've spent many many hours diagnosing issues with the Pi that otherwise would not have happened on other mini PCs.

That said, there really isn't a market for mini PCs in my region so this is what I'm stuck with for the foreseeable future.