Yes, it’s why I stopped using DuckDNS and decided to buy my own domain. I used Porkbun and got a cheap one (~$15/year?). It was super easy, and DNS results are lightning fast now; no timeouts/errors/etc. like when I was using DuckDNS.
My router supports Porkbun for DDNS; it handles updating the A/AAAA records for my domain when my IP changes, but if your router doesn’t have that option, I’m sure there’s a script you could run on a PC or Raspberry Pi, etc. to handle that for you.
I honestly don’t know why I didn’t do this sooner! I’ve changed DDNS providers a few times over the years and it’s always a pain to update everything that references the old names. It’s great having peace of mind knowing that I own the domain now and won’t have to change again (even if I wanted to leave Porkbun, I could just transfer the domain registration to any number of good alternatives and not have to change my domain name).
I switched to a paid domain in the last few months and regret not doing it sooner - it just works, and it’s nice knowing that I won’t have to reconfigure all my stuff to point at a different domain name again in the future. Price was maybe $15/year on porkbun - very much worth it imo.
I’ve also used freedns in the past and had no complaints about them, except that I think wildcard subdomains are limited to paid supporters (very cheap though) and at the time my SWAG docker image maybe didn’t support them? It’s been a while. The service was great though. Never had problems like I did with duckdns.