Apologies for the delay. I missed this thread originally. I will look into it as soon as I can. Maintenance of the app is made more difficult by Apple updates that break it.
In the meantime, please try to use the web version. It is possible to add an icon to your home screen that starts the web version, and it is designed to format itself correctly for the phone size screen.
To add an icon to your home screen go to the front page of the forum (or the main home page, whichever you prefer) then tap the share icon in safari. You can scroll the bottom row of actions and you will find one called “add to home screen”.
