Actually, i've got an app for Android. It's quite well localized and is easy to use
That app you downloaded are not created by Bitcointalk Staff, I suggest to delete those as it might hijack your account in later dates.
This has happened before and you better be safe than lose your account for a little convenience.
Just use your Android/iPhone browsers, the forum is not heavy to load as it doesn't have flashy effects or gigantic plugins installed, your phone should be able to handle it fine.
I used to have that app on my Android too (can't recall where I found it) but it never worked. Glad I came across that post to hunt it may be a threat... Thanks, I deleted it now!