Oura Ring or Ultrahuman Ring?

I have been debating getting a smart ring for some time now. I am not sure if an oura or ultrahuman is better?

I know that the ultrahuman ring and oura track your body temp (which I want to track my cycles natrually). Do both rings take temp automatically? Can I just enter data manually in flo app?

If anybody has any feedback on this that would be great