If you mean MDroid app:
There is a link to e-mail the developer on there / visit website.
Having read this one, it was made to work with one specific moodle primarily, then they've tried to generalise it work with all of them - but it seems not everyone has got it to work with theirs. Perhaps if they publish the fix for how they've changed their moodle for it to work, it would help.
I can recommend the official Android app - Moodle Mobile. It's getting better too the way they maintain it now.
More details and Play store link here: