These mobile apps are outside the realm of HTalk and are not supported by us.
If you are having issues using a mobile app then all I can say is "sorry". I use TapaTalk and have no issues with it at all.
But, I don't view attached files of any kind while on the road nor do I try to adjust my user settings or profile while using a mobile app. I use the "remember me" box when I log in and the site opens for me every time.
The best and only support we can offer is to install their updates on the site as they come in.