Looks nice! Just a small bit of feedback, since many of the values you're collecting are quite specific (i.e. I weigh 58kg and ate 212 calories) then probably a slider is not the right way to go.
From the Nielsen group:
Selecting a precise value using a slider is a difficult task requiring good motor skills, even if the slider is well designed. If picking an exact value is important to the goal of the interface, choose an alternate UI element.
Good feedback, thanks! Will look into that.