The page where you enter body measurements does not format properly on my phone. Therefore I can only see whether I'm putting in details for the left or right side of my body by watching the blue suggestion ring moving (it's also backwards, left measurement highlights the right side of the figure) and this makes it difficult to work out if I've entered the right bicep, calf, etc. measurements (which are offscreen) correctly.
Perhaps easiest formatting would be to have the right side listed under the left?