Jon-Do-Nym is a paid proxy provider with a similar structure to Tor. But nodes aren't hosted by volunteers, they are hosted by themselves. There was one free server the last time I've tested it and it was a German IP in Dresden. Speed was slow. And afaik they do log user IPs.

Wouldn't recommend them. I would use a VPN like Mullvad combined with Tor. But maybe a VPN or Tor alone is sufficent in your case.

Edit: Looks like there was an option to selfhost nodes (link doesn't work anymore), the whole project looks dead too (old website, old entries). And no info about the AN.ON app...