I'm trying to find a structured vocabulary list that I can use for flashcards. It seems that you are expected to just build your own, but I would have thought it someone would have built one based on word frequency. Or better still, based on an approved qualification system. I realise that there are some books about, but I want it electronically so I can use a flashcard app on my smart phone (preferably Anki). There are some flashcard sets online but these seem to be based on the whims of whoever constructed it, and in some cases inaccurate or full of mistakes.
I'm happy to pay for it ... I just can't find anything.
Any suggestions would be greatly appreciated.