I've just tested one very simple auditing Crystal report on BI Mobie app. : "Users - most active".
=> Very disappointing... 
Prompts are displayed but no lists of values so it's very difficult to type right data, especially date in good format !
I didn't manage to get data from this report but no error message was displayed, just a grey screen.
This report works well in CMC (4 prompts, 1 is not mandatory, LOV and calendar well displayed).