What expression is more natural for native speakers?
I'm tired, more every day.
Or
I'm tired, every day more.
What expression is more natural for native speakers?
I'm tired, more every day.
Or
I'm tired, every day more.
Your examples sound a little unnatural. It's not 100% clear what you are trying to say. Correct me if I am wrong, but I assume you are trying to say that with each day that passes you feel more tired than the previous day. If that is your intended meaning, I would use something like the following:
I feel more and more tired (with) every day.
I'm getting more and more tired (with) every day.
or
I feel more and more tired with every passing day.
... although admittedly that final sentence has a slightly formal feel to it.
Neither sounds natural to me. I might say:
I'm tired, more and more every day. [You could say this to your doctor.]
or I might say:
Every day, I feel tireder than the day before. [You could also say this to your doctor. Or you might say it to a friend as a prelude to asking your friend if he or she thinks you should go to a doctor.]