My understanding is that the question bank is used for commercial (CPL+) level across Europe - not PPL level.
http://easa.europa.eu/easa-and-you/a...tion-bank-ecqb
Airquiz is certainly UK focused. However as the topics and syllabus are the same Europe wide, the websites are still going to be useful. You may find that the exams are split in different ways but the content will be similar.