Looks pretty good My suggestions for now is if you are running on a bigger screen, the tabs on the bottom are packed to the left. I think it would be better to align them in the center, but that's just my opinion. I could understand if you want to add more tabs later on or something.
The other is to increase the font-weight to bold or something as it is hard for me to read the thin font.
Thx for taking a look! It's funny the way things work, but everything you mentioned is because I chose to use no icons in the tabbar, and it was a b#@ch getting these four tabs to fit on a phone screen. Thx again!