Cant create account

As of right now the settings on the "make an account" page dont allow my "old" iPhone 4s to finish creating a required account because after I finish filling out the boxes my keyboard gets stuck over the "done" button. I cant even move the page up or down to get to the "done" button or hide my keyboard. Im sure this was made perfectly for iPhone 5 and newer. However, this renders the app entirely useless to me as its required to make an account. Please fix it for my "ancient" iPhone 4s and for every iPhone 4 that would like to use this potentially useful app. As for now, I shall delete wholesome and hope for an update.

Svfreebird about Wholesome - Healthy eating, v4.0