UWorld's Qbank Mobile App allows you to access your USMLE STEP 1, STEP 2 CK/Shelf and STEP 3 on your Android phone and tablet devices. Please use the "UWorld Boards" app for ABIM and ABFM Qbanks. This app REQUIRES a valid UWorld USMLE Qbank or Self assessment subscription to access the course material, which can be purchased from UWorld website (.