i haven’t been able to use the Wanikani App on iPhone, but i think it’s because it doesn’t work on iPhone X. I get stuck after login with a spinning “Doge”
I think that one is not supported anymore. None of these apps are official, they have been made by Wanikani users. Try Tsurukame or Allicrab.
I now use both. Tsurukame for all reviews. Alicrab for the dashboard. For lessons: Alicrab if creating custom mnemonics (usually kanji), otherwise Tsurukame (usually vocab).
i’m using allicrab for now. i like how it includes the browser plugins, which i didn’t really know about.