On March 30, 2018, an iPhone app "Diet bitcoin wallet" should be available, but it is not in search engine in the AppStore. So when will it be available? I respect that programmers have been bugging their heads for creating applications and programs.
It is already completed, however, Apple has been taking over a week of back and forth for approvals, so we are waiting for such in order for it to be public. But it is already uploaded, just not public.